Most commercial roof problems are visible before they become expensive. The trouble is that most property managers don’t know what they’re looking at when they’re up there, so small deficiencies compound quietly until someone calls about water coming through a ceiling tile.

This checklist gives you a structured way to walk a commercial flat roof and document what you find. You need good eyes, a phone camera, and the discipline to do it twice a year.

If you prefer to have a professional handle inspections, our professional flat roof assessment team can provide a written condition report with repair priorities and estimated remaining life, which most institutional landlords and property insurers now expect.

Before you go up: safety and access requirements

Ontario requires fall protection when working within 2 metres of an unprotected roof edge. If your building has guardrails or a permanent fall arrest anchor system installed, confirm they’re rated and in good condition before putting weight on them.

If your rooftop does not have compliant edge protection, you should not be up there without a proper harness and an anchor point rated for the activity. Our rooftop safety system installation team installs permanent guardrail and anchor systems that make routine roof access safe and code-compliant.

At minimum before any roof walk: check weather (don’t walk a wet membrane), tell someone you’re going up, wear soft-soled shoes, and bring your phone for documentation.

Membrane surface inspection

Walk the full surface area in a grid pattern rather than wandering. You’ll miss things if you don’t systematically cover the roof.

Blistering. A small blister under 6 inches in diameter that feels firm is usually a cosmetic concern. A large blister or one that feels soft and spongy when you press it means there’s moisture or air trapped in the assembly beneath. Mark it for professional evaluation.

Cracks and splits. Any visible crack in the membrane surface is a potential water entry point. Particularly watch the perimeter area within 2 feet of parapet walls, where thermal movement stress concentrates.

Open or lifted seams. Run your hand along seams. On TPO and PVC, seams should be solid and fused. Any seam you can get a fingernail under is a problem.

Granule loss on modified bitumen. Patchy areas where the granule surface has worn off expose the underlying asphalt to UV. Widespread granule loss is a sign of accelerated aging.

Surface debris and ponding water. Standing water 48 or more hours after rain is a drainage problem. Check if drains are clogged. Debris mounds trap moisture against the membrane.

Drainage system check

Every drain, scupper, and overflow drain on the roof needs to be clear.

Roof drains: remove the strainer and check the drain body for debris. Pour a bucket of water slowly and confirm it drains at a reasonable rate rather than backing up.

Scuppers: look through them from the roof side. Any bird nesting material, leaves, or debris blocking a scupper is a potential ponding problem during heavy rain. Ontario had several significant late-summer rain events in 2024 and 2025 where blocked scuppers caused interior flooding that proper drainage would have prevented.

Overflow drains: these emergency relief drains are set higher than primary drains. If they show signs of consistent flow (rust staining, debris rings), your primary drains aren’t doing their job.

Flashings and terminations

Flashings are the strips of material that transition from the membrane surface up and over any vertical element: parapet walls, expansion joints, curbs. They’re the most common failure point on commercial roofs.

Base flashings. At every parapet wall, the membrane should turn up the wall face a minimum of 8 inches. The termination bar at the top should be firmly anchored, with sealant at the top edge intact. If the sealant is cracked or the termination bar is pulling away, water can get behind the flashing.

Expansion joints. These should have a continuous flexible bellows or cover above them. Any cracking or splitting in an expansion joint cover needs professional repair because the joint is designed to move, and a rigid repair won’t last.

Penetrations and equipment curbs

Every penetration through the membrane is a potential failure point. On older commercial buildings, penetrations accumulate over years of tenant improvements and HVAC upgrades, sometimes with no formal flashing at all.

For each penetration, check is there a proper curb? Is the flashing continuous and in contact with the curb sides? Is sealant at the top of the curb flashing intact and not cracked? For conduit, is the entry point sealed?

Pay particular attention to areas where multiple penetrations cluster together, typically around HVAC units. Crowded penetration areas are hard to flash properly and often have overlapping repair history that creates complex water paths.

Rooftop equipment condition

You’re not doing an HVAC inspection. But the condition of rooftop equipment affects your roof.

Condensate discharge: HVAC condensate should discharge through a proper line to a drain. If condensate is draining directly onto the membrane, it concentrates water in one spot and can contain refrigerant oil that degrades some membrane types over time.

Unit mounting: check that equipment legs are sitting on proper curbs or isolation pads, not directly on the membrane. Equipment resting directly on the membrane creates abrasion and puncture risk during servicing.

Parapet walls and coping

Parapet walls are the short walls around the perimeter of most commercial flat roofs. They take significant weather exposure and are a common source of leaks that appear to come from the roof but actually enter through the wall.

Coping: the metal cap on top of the parapet should be continuously seamed with no open joints. Water that enters through a coping joint runs down inside the wall cavity and can exit at ceiling level inside the building, nowhere near the roof perimeter. Property managers frequently assume the roof is leaking when the actual failure is coping.

Mortar joints: on masonry parapet walls, check mortar joints for deterioration. Spalling brick or eroded mortar is a water infiltration path that has nothing to do with the roof membrane.

Documentation: what to photograph and record

After every roof walk, document what you found. A photo log that goes nowhere is useless. For each deficiency, take a wide-angle photo showing location relative to a fixed reference, take a close-up of the defect, and write a brief description of what it is and approximate size.

Keep this documentation in a folder per building, organized by inspection date. When you’re negotiating a capital repair budget or making a warranty claim with the membrane manufacturer, this record is what gets decisions made quickly.

When to call a professional

Do the semi-annual walk yourself. Call a professional when you find a blister larger than 12 inches, there is standing water that hasn’t drained within 48 hours of the last rain, a seam has opened, you find any deficiency you can’t clearly categorize, the roof is over 15 years old without a recent condition assessment, or you’re buying, selling, or refinancing the building.

A professional flat roof inspection includes non-destructive testing, documented condition ratings, and repair prioritization. If you suspect wet insulation, add infrared scanning to the scope. An infrared scan after a clear day will show thermal anomalies where wet insulation retains heat differently from dry areas.

Printable commercial roof inspection checklist Download PDF

The post Commercial roof inspection checklist: what property managers should look for appeared first on Industrial Roofing.

1. Why roofing material is the single biggest lifespan factor
2. Commercial flat roof lifespan by material type
3. What shortens or extends your roof life
4. Repair vs replace calculator
5. How to find out what type of roof you have
6. Signs your roof is nearing end of life
7. FAQ

Knowing how long your commercial roof will last sounds like a simple question. The honest answer depends almost entirely on what it’s made of, how it was installed, and how consistently it gets maintained.

Most property managers in the GTA are working with roofs installed by the previous building owner, sometimes 15 or 20 years ago. They don’t always know the membrane type, let alone the installation date. This guide will help you identify what you have, what to expect from it, and when replacement starts making more financial sense than continued patching.

If you’ve been dealing with recurring leaks or drainage issues, our team has been fixing flat roofs for years and can help you figure out what’s worth fixing and what isn’t.

Why Roofing Material is the Single Biggest Lifespan Factor

A flat roof isn’t one thing. It’s a system, and the membrane at the top of that system is what determines whether you get 15 years out of it or 30. Everything else, installation quality, drainage design, deck condition, maintenance frequency, operates within the ceiling set by the membrane choice.

Ontario’s climate is genuinely brutal on commercial roofs. You get freeze-thaw cycles from October through April, UV radiation in summer, and ponding water events that stress seams and flashings every spring. A membrane that handles one of these factors poorly will fail early, full stop.

The good news is all of the major membrane systems used in Ontario can hit their rated lifespan when installed correctly and maintained. Most early failures come from installation shortcuts or deferred maintenance, not inherent material flaws.

Commercial Flat Roof Lifespan by Material Type

Here’s what the data looks like across the main systems you’ll find on commercial and industrial buildings in southern Ontario.

TPO (thermoplastic polyolefin)

Rated lifespan: 15 to 20 years. Real-world average: 20 years with good maintenance.

TPO has become the dominant single-ply membrane in Ontario commercial construction over the past decade. It’s heat-welded, which means seams fuse together into a continuous waterproof layer rather than relying on adhesive or tape. That’s a significant advantage over older systems.

The variability in lifespan comes down to two things: membrane thickness and seam quality. A 45-mil TPO installed at minimum spec will age out faster than an 80-mil membrane with wide, properly welded seams. On industrial roofs, 60-mil or heavier is strongly recommended. Cheap installation is the main reason TPO roofs fail early.

EPDM (ethylene propylene diene monomer)

Rated lifespan: 20 to 25 years. Real-world average: 20 to 25 years.

EPDM is the older rubber membrane that built up the single-ply market in Ontario before TPO took over. It’s still widely used on re-covers and where chemical exposure is a concern. Some industrial rooftops have exhaust or runoff that degrades TPO faster than EPDM. Any EPDM roof over 15 years old is worth a seam inspection.

PVC (polyvinyl chloride)

Rated lifespan: 20 to 25 years. Real-world average: 25 years.

PVC performs similarly to TPO in most Ontario climates, with one specific advantage: chemical resistance. Restaurant chains and food processing facilities in the GTA use PVC heavily for this reason. After year 20, any rooftop work should be done carefully to avoid cracking an aged PVC membrane.

Modified bitumen (mod bit)

Rated lifespan: 15 to 25 years. Real-world average: 18 to 22 years.

Modified bitumen is still very common on Ontario industrial and commercial buildings built before 2005. A well-installed mod bit roof is genuinely tough. Multi-ply systems resist puncture better than single-ply membranes, which matters on roofs with heavy foot traffic for HVAC maintenance.

Built-up roofing (BUR)

Rated lifespan: 15 to 30 years (highly variable). Real-world average: 25-30 years under good conditions.

Built-up roofing, also known as ‘tar and gravel’, is the oldest commercial flat roofing system still in service in Ontario. BUR systems can last a very long time when the gravel surface protects the underlying felts from UV exposure.

What Shortens a Flat Roof’s Life

Membrane type sets the ceiling. What happens above and below that ceiling is largely within a property manager’s control.

Deferred maintenance is the single biggest accelerator of roof failure. A small blister that costs less to fix becomes a full flashing failure that costs a lot more to repair if it sits through two more winter cycles. Ontario buildings with annual or semi-annual inspection schedules consistently outlast those with reactive maintenance programs by 5 to 8 years on the same membrane system.

Ponding water is the second major factor. Flat roofs aren’t actually flat; they’re designed with slope to drain. When drains clog or the deck deflects and holds water, that water works on the membrane continuously. Even a small pond sitting for 48 hours after a rain event accelerates membrane degradation at the contact point.

Unauthorized penetrations are a silent killer. Every time an HVAC, electrical, or telecom contractor cuts into or anchors through a membrane without proper flashing protocol, they create a potential leak point.

A formal roof maintenance program reliably adds years. Flat roof maintenance contracts cover drain clearing, flashing checks, membrane surface inspection, and documentation of any deficiencies. That documentation also gives you leverage when negotiating manufacturer warranty claims.

How to Find out What Type of Roof you Have

TPO is white or light grey with a smooth, slightly plasticky surface. Seams are welded and slightly raised. EPDM is black and feels like thick rubber. PVC looks similar to TPO but tends to be slightly shinier. Modified bitumen has a granulated surface on the cap sheet, similar to shingle granules.

When in doubt, a flat roof inspection will document the membrane type, condition rating, and estimated remaining life. A flat roof infrared scan adds another layer, it identifies wet insulation beneath the surface that cannot be seen in a visual inspection.

Signs your Commercial Roof is Nearing end of Life

These are the signals that shift the calculation from repair to replace.

Blistering is widespread. Small, isolated blisters are repairable. When blistering covers 20% or more of the field membrane, the underlying insulation is almost certainly compromised.

Seam failures are recurring. One seam failure is a repair. Recurring seam failures across multiple areas means the membrane has aged past the point where individual repairs hold.

You’ve had three or more leak events in one year. A roof generating three or more calls per season is consuming maintenance budget that would be better applied to replacement.

The system is past 85% of rated lifespan. Once you cross that threshold, capital reserve planning should start. Lead time for scoping, tendering, and scheduling a major commercial roof project can run 6 to 12 months.

Commercial flat roof lifespan quick guide Download PDF

The post How long does a commercial flat roof last? A lifespan guide by material appeared first on Industrial Roofing.

What is a Cool Roof Coating

A cool roof coating is a liquid-applied elastomeric membrane, usually white, rolled or sprayed over an existing roof surface. The coating bonds to the substrate, cures into a flexible monolithic skin, and reflects 75 to 90 percent of incoming solar radiation. Most coatings used in the GTA are one of three chemistries:

• Acrylic. The most common, lowest cost, breathable. Best for sloped roofs and dry climates. Limited ponding water resistance, which matters on flat roofs.
• Silicone. The premium choice for flat industrial roofs. Excellent ponding water resistance, holds reflectivity for 15+ years without yellowing, and bonds to almost any substrate including weathered single-ply.
• Polyurethane. Highest impact and abrasion resistance. Used on roofs with foot traffic or hail exposure. Higher cost and harder to recoat in 10 years.

How Much Energy a Cool Coating Actually Saves

The Lawrence Berkeley National Laboratory cool roof studies (replicated by ENERGY STAR) consistently find 10 to 30 percent reductions in summer cooling load on coated buildings versus uncoated dark roofs. On a 100,000 square foot Toronto warehouse with 200 tons of installed cooling, that translates roughly to:

• 15 to 25 percent lower peak demand in July and August (smaller demand charges)
• $8,000 to $20,000 per year in cooling-related electricity savings, depending on building use, insulation, and HVAC efficiency
• Surface temperature drops of 30 to 40 degrees Celsius at peak
• Roof membrane lifespan extension of 5 to 10 years (the coating absorbs the UV the membrane no longer has to)

For air-conditioned facilities the math is direct. For unconditioned warehouses, the savings come indirectly through worker comfort, less product heat damage, and slower membrane aging. If you’re looking to get your flat roof professionally fixed, let our team with 50+ years of experience get the job done quickly, safely, and properly!

When a Coating is the Right Answer

Cool coatings are the right answer when:

• The existing membrane is structurally sound but UV-aged, chalky, or losing reflectivity
• The roof is not leaking widely (small repairable leaks are fine, widespread saturation is not)
• Insulation is dry (verified by infrared scan and core samples)
• The building owner wants 10 to 15 more years out of the existing assembly before committing to a re-roof
• The building has air conditioning load worth lowering, or qualifies for Toronto Green Standard credit

Coatings are the wrong answer when:

• The insulation is wet anywhere on the roof (a coating will trap the moisture and accelerate deck corrosion)
• The membrane has more than 10 percent of its area in active failure
• Seams are open or fasteners are backing out
• Drainage is broken (coating cannot fix slope)

An honest pre-coating inspection always includes an infrared moisture scan and core samples. Skip that step and the coating becomes a 5-year mistake instead of a 15-year extension.

Toronto Green Standard and Incentive Programs

The Toronto Green Standard sets a minimum solar reflectance index (SRI) on roofs for new construction and many major retrofits inside the City of Toronto. White cool roof coatings on aged commercial roofs are one of the cheapest ways to bring an existing building up to the SRI threshold, particularly when paired with energy retrofit financing. The ENERGY STAR roof products program certifies coatings that meet a baseline reflectance and emittance and is the easiest credential to use when documenting a coating for green building certifications.

Save On Energy and various IESO retrofit programs in Ontario have historically offered rebates on cool roof installations as part of broader energy retrofit packages. Programs change yearly, so confirm current incentives with your roofing contractor or energy consultant before pricing the project.

Building Code and Warranty Considerations

Cool roof coatings are recognized under the Ontario Building Code as roof restoration systems and do not by themselves require a building permit. Any work that affects the structural deck, drainage, or insulation does. The bigger watch-out is membrane warranties: applying a coating over a single-ply membrane that is still under manufacturer warranty often voids the warranty. Always check the existing manufacturer’s recoat policy before committing. Some manufacturers explicitly approve coatings as a service-life extension and will register the coating into the existing warranty.

What a Coating Project Looks Like

A typical 50,000 square foot coating job on a GTA warehouse takes 5 to 10 working days, depending on weather and surface prep. The sequence is:

1. Pre-project inspection: infrared scan, core samples, drainage check, membrane probe
2. Repair scope: patch active leaks, replace wet insulation cuts, re-attach loose flashings
3. Pressure wash and detergent clean, full surface dry
4. Primer if the substrate requires it (silicone needs none; acrylic over old EPDM needs a primer)
5. Base coat application by spray or roller at the manufacturer-specified mil thickness
6. Cure time, then topcoat at the second specified mil thickness
7. Final wet-mil and dry-mil thickness verification, photo documentation, warranty registration

Lifespan and Recoat Schedule

A properly installed silicone coating on a flat industrial roof in the GTA holds up for 15 to 20 years. Acrylic coatings hold for 10 to 12 years. Polyurethane holds for 12 to 15 years and tolerates more abuse. All coatings can be recoated at the end of their life rather than removed, which means the building moves into a perpetual renewal cycle of 15-year coating extensions instead of 25-year tear-offs. For long-hold industrial owners, that math is significantly cheaper over a 50-year horizon than the conventional re-roof cycle.

Get a Coating Evaluation for Your Roof

If you have a 10 to 20 year old commercial roof in the GTA that is structurally sound but losing performance, a cool roof coating can buy you another decade of service for a quarter of the cost of a re-roof, with energy savings on top. Industrial Roofing Services Limited has been coating and restoring industrial roofs across Southern Ontario since 1973, and we always start with a moisture scan and core sample before quoting. request a free quote and we will tell you honestly whether a coating or a re-roof is the right answer for your building.

Frequently asked questions

Can I coat a TPO roof?

Yes, with a silicone coating and the proper primer. Manufacturer approval is required to maintain any remaining warranty. Do not coat a TPO roof that is less than 8 years old without checking with the membrane manufacturer.

Will a cool coating cool my warehouse without air conditioning?

Yes, but indirectly. Surface and roof deck temperatures drop 25 to 35 degrees Celsius. Inside air temperature drops 3 to 8 degrees Celsius depending on insulation and air change rates. For warehouses without air conditioning, the worker comfort and product protection benefit is meaningful but harder to monetize than HVAC savings.

Does a cool roof void my existing membrane warranty?

Sometimes. Always check with the original manufacturer before applying any coating. Some manufacturers (Carlisle, GAF, Firestone) have approved restoration coating programs that maintain the warranty. Others void it on contact.

What about ponding water?

Silicone is the only coating chemistry that handles long-term ponding without breaking down. If your roof has chronic ponding (no drainage repair planned), specify silicone. Acrylic will fail at the ponding edges within 3 to 5 years.

Can a coating fix an active leak?

A coating patches small leaks at penetrations and minor seam openings. It cannot fix wet insulation, broken drains, structural movement cracks, or large membrane failures. Repairs go in before the coating, not after.

The post Cool Roof Coatings vs Re-Roofing for Industrial Buildings appeared first on Industrial Roofing.

The Quick Answer

Most GTA commercial buildings under 100,000 square feet end up with TPO. It is the cheapest of the three, welds clean, and the warranty options are now competitive with PVC. EPDM still wins on a few specific buildings (cold-only environments, simple geometry, owners who plan to hold the building 20+ years and do not mind a black roof). PVC wins where there are rooftop chemical exhausts, kitchen grease vents, or rooftop solar panels going in. It may seem simple, but there’s more to this than you think.

What Each Membrane Actually is

TPO (thermoplastic polyolefin)

A blend of polypropylene and ethylene-propylene rubber, reinforced with a polyester scrim. Comes off the roll white (the most common colour in the GTA), grey, or tan. Sheets are seamed with hot-air welding which creates a chemical fusion stronger than the membrane itself. Average installed thickness is 60 mil for commercial work, 80 mil where the warranty calls for it.

EPDM (ethylene propylene diene monomer)

A synthetic rubber, almost always black, sometimes white-coated. The original “rubber roof” that took over the North American flat roof market in the 1980s. Sheets are seamed with adhesive tape and primer rather than heat-welded. Standard thickness is 60 mil, with 90 mil available where impact resistance matters.

PVC (polyvinyl chloride)

A thermoplastic membrane reinforced with polyester or fibreglass. White or grey on most GTA installs. Hot-air welded like TPO. Standard thickness 50 to 80 mil. PVC was the original single-ply heat-welded membrane, and it is still the gold standard for chemical and grease resistance.

Lifespan and Warranty

All three membranes carry 20 to 25 year manufacturer warranties when installed by a certified contractor. Based on our team’s experience, this is what we found for real world cases.

• EPDM: 20 – 25 years years on a well-maintained roof. The longest service life of the three. Black EPDM gets brittle after about 25 years but rarely fails catastrophically.
• PVC: 25 years. The plasticizers in older PVC formulations migrated out of the membrane and caused shrinkage at corners. Modern PVC formulations have largely solved this.
• TPO: 20 years on the newer formulations (post-2010). Earlier TPO had real durability problems and a deserved bad reputation. The current generation is significantly improved.

Chemical and Grease Resistance

This is the single biggest reason to pick PVC over TPO. Animal fats, kitchen grease, jet fuel, and many industrial solvents will degrade TPO and EPDM but have almost no effect on PVC. If your building has rooftop kitchen exhausts, food processing, or chemical exhaust stacks, the membrane around those penetrations needs to be PVC even if the rest of the roof is TPO. Most roofers will install PVC walk pads and curb wraps in those zones as a hybrid solution.

Energy Performance and Cool Roofs

White TPO and white PVC reflect 75 to 85 percent of incoming solar radiation. Black EPDM reflects under 10 percent. On a hot Toronto July afternoon, a black EPDM roof can run 70 to 80 degrees Celsius on the surface while a white TPO next door runs 35 to 40 degrees. That heat transfers through the deck into the building and into the HVAC load. For air-conditioned warehouses and distribution centres, the cooling savings on a white roof typically pay for the membrane upgrade within 8 to 12 years. White-coated EPDM exists but commands a premium that erases the cost advantage.

Wind Uplift and Storm Performance

All three membranes can pass FM Global wind uplift testing for the GTA wind zone. The difference is in the installation method. Mechanically attached single-ply (TPO and PVC) handles wind uplift through fastener spacing engineered to the deck and the building height. Fully adhered systems use bonding adhesives. Ballasted EPDM relies on the ballast weight, which is the reason many newer GTA buildings cannot use it. After the major windstorms of 2018 and 2022 in Southern Ontario, several improperly designed ballasted roofs lost ballast over the parapet, exposing the membrane to point loads.

Welding and Seam Reliability

This is where TPO and PVC have a real advantage over EPDM. A hot-air weld at 540 degrees Celsius fuses two sheets into a single piece of plastic. The seam is stronger than the membrane itself, and a proper welder can probe-test every seam before leaving the roof. EPDM seams use seam tape with primer. The tape is reliable when installed correctly, but adhesive seams are slower to inspect, and any contamination during application creates a weak point. Over 25 years on a roof, the most common EPDM failure mode is tape seam separation at corners and penetrations.

Which membrane to Pick

• Standard GTA warehouse, distribution centre, big box retail: TPO. Best price, best welding, current formulations are reliable, white reflects heat. Pick a tier-one manufacturer and install at 60 mil minimum.
• Long-hold owner, simple roof, no rooftop equipment, comfortable with black: EPDM. Longest service life, lowest maintenance over the holding period, and the simplest field-installed system in the trade.
• Restaurant, food processing, industrial chemical exhaust, rooftop solar: PVC. The chemical resistance and weldability are worth the premium, and PVC is the only membrane some solar manufacturers will warrant against.
• Cold storage warehouse: Either TPO or PVC, fully adhered, with vapour control on the warm side of the insulation. EPDM is harder to detail at the cold-side penetrations.

Good Installation vs a Bad One

Membrane choice matters less than installation quality. The same TPO that lasts 20 years on a careful install will fail in 8 years on a sloppy one. Look for:

1. Manufacturer certification of the installing contractor (not just the company, the foreman on your job).
2. Proper insulation board layout with staggered joints and full coverage adhesive or fastener pattern.
3. Detailed flashing at every penetration, parapet, and equipment curb. Field welds at corners, not patched membrane.

Final Thoughts

Every GTA commercial building has a single membrane that is the right answer when you weigh cost, lifespan, energy savings, and the equipment on the roof. Industrial Roofing Services Limited has installed all three systems across Southern Ontario since 1973, and we will give you a comparison quote across TPO, EPDM, and PVC for the same scope before you commit. request a free quote and we will walk through your roof, and put real numbers against each option.

Frequently Asked Questions

Is white TPO required by Toronto Green Standard?

Toronto Green Standard requires a minimum solar reflectance index (SRI) on roofs for new construction and major retrofits in many zones. White TPO and white PVC meet the requirement. Black EPDM does not. White-coated EPDM does. Check with your designer for your specific building tier under the standard.

How thick should my membrane be?

60 mil is the standard for commercial work in the GTA. 80 mil is recommended for high-traffic roofs (frequent maintenance access), high-hail-risk locations, or any building where a 30-year warranty is on the table. The cost increase from 60 to 80 mil is usually 15 to 20 percent and is almost always worth it on a building you plan to hold for two decades.

What about ballasted EPDM over insulation?

Older buildings with deck capacity for ballast can still use it. New steel decks rarely have the structural margin. Always have the structural engineer sign off on dead load before specifying ballast on any post-1990 building.

Do single-ply roofs need maintenance?

Yes. Twice-yearly inspections, drain cleaning, and seam checks at penetrations are standard. A maintained roof routinely outlasts its warranty. An ignored roof routinely fails inside the warranty period and the manufacturer voids the claim because of the lack of maintenance records.

The post TPO vs EPDM vs PVC Roof for GTA Commercial Buildings appeared first on Industrial Roofing.

For us, commercial flat roofing isn’t just about installing materials – it’s about doing the job properly, safely, and to a standard that we’d be confident putting our name behind every single time.

That’s why we’ve made it a priority to align ourselves with leading industry organizations and follow strict safety practices on every project we take on.

Members of the Canadian Roofing Contractors Association

We are proud members of the Canadian Roofing Contractors Association (CRCA), one of the leading organizations representing roofing professionals across Canada.

For us, this isn’t just a badge, it’s a way of staying connected to the wider industry and making sure we’re always working in line with the latest standards, materials, and best practices.

Being part of CRCA means we stay aligned with:

• National roofing standards and best practices
• Ongoing industry developments and innovations
• Professional guidelines that ensure consistent quality across every project

It also reflects our commitment to operating as a trusted, reputable commercial roofing contractor within the Canadian industry.

Members of the Ontario Industrial Roofing Contractors Association

We are also members of the Ontario Industrial Roofing Contractors Association (OIRCA), which focuses specifically on commercial and industrial roofing across Ontario.

Through OIRCA, we maintain:

• Up-to-date knowledge of Ontario-specific roofing standards
• Compliance with provincial regulations and safety requirements
• Access to ongoing training and industry resources

This ensures that every project we complete meets not only national standards, but also the specific demands of Ontario’s commercial roofing environment.

Fully Registered With Workplace Safety and Insurance Board (WSIB)

Safety on site is a top priority for our team.

We are fully registered with the Workplace Safety and Insurance Board (WSIB), which means:

• Our team is covered under Ontario’s workplace insurance program
• We meet strict safety and compliance requirements
• Our clients have peace of mind knowing they are working with a responsible contractor

Why It Matters for You

All of this isn’t just about memberships, it’s about how we actually work on site.

When you choose Industrial Roofing Services Limited, you can expect:

• Careful planning before any work begins
• Proper safety systems and equipment on every project
• A team that’s trained, experienced, and accountable
• Clear communication from start to finish

We know that hiring a commercial roofing contractor is a big decision. You’re trusting someone to work on your building, protect your investment, and make sure everything is done properly.

By working with a company that’s aligned with recognized industry organizations and safety standards, you’re reducing risk and gaining confidence that the job will be handled professionally from day one.

Let’s Talk About Your Roof

Whether you need an inspection, repairs, or a full replacement, our team is ready to support you.

Get in touch with Industrial Roofing Services Limited today to schedule a consultation.

The post Our Commitment to Industry Standards & Safety: Trusted Roofers in Ontario appeared first on Industrial Roofing.

The quickest way to tell is by looking at the surface:

• Gravel embedded in the top layer? Likely a Built-Up Roof (BUR).
• Dark, smooth rolled asphalt sheets with visible seams? Probably Modified Bitumen.
• Black rubber membrane? Typically EPDM.
• White membrane with heat-welded seams? Likely TPO or PVC.
• Visible metal panels? A metal roofing system.

Each flat roofing material has specific visual clues. The only way to know for certain, however, is through a professional roof inspection where we examine the membrane, seams, flashings, insulation, and overall system.

Let’s walk through how to identify the most common flat roofing materials in Ontario, and why it matters.

Table Of Contents:
Why Is It Important?
Types Of Flat Roof Systems
Asphalt Flat Roofs
Single Ply Roofs
Metal Roofs
Still Unsure?

Why Is It Important To Know What Type Of Material Your Roof Is Made From?

Knowing your roof system isn’t just a technical detail, it directly affects:

• How repairs are performed
• What maintenance schedule you should follow
• What type of replacement system is compatible
• Warranty coverage
• Expected lifespan
• Energy performance
• How your roof handles Ontario’s freeze-thaw cycles

For example, repairing a PVC membrane is completely different from repairing a built-up asphalt roof. Using the wrong method can shorten your roof’s life or void warranties.

When we visit a site, identifying the system is always our first step before recommending any solution.

Types Of Flat Roof Systems & How To Know Which One You Have

Flat roofs in Ontario typically fall into three main categories:

1. Asphalt-based systems (BUR and Modified Bitumen)
2. Single-ply membrane systems (EPDM, TPO, PVC)
3. Metal roofing systems

Each has distinct characteristics.

Let’s break them down.

Asphalt Flat Roofs

Asphalt systems are among the oldest and most trusted flat roofing materials. They are built in layers and are typically darker in appearance.

You’ll usually find these on older commercial and industrial buildings throughout Ontario.

1. BUR Roof (Built-Up Roofing)

Often called a “tar and gravel” roof.

Tell-Tale Characteristics Of BUR

• Gravel or small stones embedded on the surface
• Thick, layered appearance
• Dark asphalt beneath the aggregate
• Feels solid and heavy underfoot
• Often found on older buildings (20+ years old)

If you see loose gravel across your roof, chances are it’s a BUR system.

Repairs, Maintenance & Lifespan of BUR

BUR systems are durable because they are built with multiple plies (layers) of asphalt and reinforcing fabric.

• Lifespan: 20–30+ years with proper maintenance
• Repairs typically involve patching layers and resealing affected areas
• Gravel may need redistribution over time
• Drainage must be monitored carefully

In Ontario’s climate, ponding water and freeze-thaw cycles can stress older BUR systems.

When Is BUR Recommended

• Large commercial or industrial buildings
• Roofs with moderate foot traffic
• Owners looking for a proven, heavy-duty system

While newer membrane systems are more common today, BUR still performs reliably when properly maintained.

2. Mod-Bit Roofs (Modified Bitumen)

Modified Bitumen roofing is essentially an evolution of BUR, but more flexible and modern.

Tell-Tale Characteristics Of Mod-Bit

• Smooth or slightly granulated surface
• Rolled sheet appearance
• Visible seams between membrane rolls
• Torch-applied or self-adhered installation marks
• Usually black or dark grey

Unlike BUR, it doesn’t typically have loose gravel. It looks more uniform.

Repairs, Maintenance & Lifespan of Mod-Bit

Modified Bitumen systems are reinforced with polymers (SBS or APP) to improve flexibility.

• Lifespan: Around 20 years
• Repairs are typically torch-applied patches
• Seams and flashing areas require regular inspection
• Performs well in Ontario’s temperature swings due to flexibility

We often see these on mid-aged commercial buildings across the GTA.

When is Mod-Bit Recommended

• Buildings exposed to temperature fluctuations
• Roofs requiring flexibility
• Projects where durability and repairability are priorities

Single Ply Roofs

Single-ply systems are installed in large sheets and have fewer layers than asphalt systems.

They are lightweight, efficient, and very common in modern commercial construction.

1. EPDM Roof

A synthetic rubber membrane.

Tell-Tale Characteristics Of EPDM

• Black rubber appearance (sometimes white)
• Feels flexible and slightly elastic
• Seams are glued or taped
• Smooth, uniform surface

If your roof looks like a giant sheet of rubber, it’s likely EPDM.

Repairs, Maintenance & Lifespan of EPDM

EPDM roofing is known for durability and flexibility.

• Lifespan: 25-40+ years with proper care
• Repairs involve seam resealing or rubber patches
• Annual inspections recommended
• Handles freeze-thaw cycles well

EPDM is one of the most common systems we see across Ontario.

When Is EPDM Recommended

• Large commercial flat roofs
• Owners looking for long-term cost efficiency
• Roofs exposed to harsh weather

1. TPO Roof

A white thermoplastic membrane.

Tell-Tale Characteristics Of TPO

• White or light-coloured membrane
• Heat-welded seams (look like clean fused lines)
• Smooth, reflective surface
• Lightweight feel

If your roof is bright white and reflective, it’s likely TPO.

Repairs, Maintenance & Lifespan of TPO

TPO seams are heat-welded, which creates strong waterproof joints.

• Lifespan: 15-20 years
• Seam integrity is key
• Punctures are patched using heat-welded materials
• Reflectivity improves energy efficiency

TPO roofing is common on newer commercial builds.

When Is TPO Recommended

• Buildings looking for improved energy performance
• Large open roof areas
• Modern commercial construction

1. PVC Roof

Another white single-ply membrane, but more chemically resistant.

Tell-Tale Characteristics Of PVC

• White or light-coloured membrane
• Heat-welded seams (similar to TPO)
• Typically installed on restaurants or industrial buildings
• Often slightly more rigid than TPO

PVC roofing can look very similar to TPO, professional inspection is usually required to confirm.

Repairs, Maintenance & Lifespan of PVC

• Lifespan: 15–25 years
• Highly resistant to grease and chemicals
• Seam welding is critical
• Regular drainage checks prevent stress

When Is PVC Recommended

• Buildings exposed to oils, chemicals, or restaurant exhaust
• Industrial applications
• Owners prioritizing durability and fire resistance

Metal Roofs

While not a membrane system, metal is still used on some low-slope or flat-style roofs.

Tell-Tale Characteristics Of Metal Roofs

• Visible metal panels
• Raised seams or fasteners
• Can show signs of rust over time
• No membrane surface

Metal roofs are easier to identify because they are visibly metal.

Repairs, Maintenance & Lifespan of Metal Roofs

• Lifespan: 30-50+ years, depending on coating
• Repairs involve panel replacement or sealing fasteners
• Rust prevention is critical
• Expansion and contraction must be managed

When Is Metal Roofs Recommended

• Buildings seeking long-term durability
• Low-slope applications
• Industrial facilities

Still Not Sure What Your Roof Is Made Of?

Even with these visual clues, some systems look very similar, especially TPO and PVC, or older Mod-Bit and BUR systems.

The safest and most accurate way to identify your roof system is through a professional inspection.

When we visit a site at Industrial Roofing Services Limited, we:

• Examine the membrane type
• Check seam construction
• Review insulation layers
• Assess flashing details
• Identify drainage design
• Determine remaining lifespan

From there, we can explain exactly what you have, and what that means for repairs, maintenance, and long-term planning.

If you’re unsure what your flat roof is made of, book an inspection and let us walk the roof with you. We’ll identify the system and explain it clearly, just like we’ve done here.

The post How Do I Know What My Flat Roof Is Made Of? appeared first on Industrial Roofing.

Whether you manage an industrial facility, office building, retail plaza, warehouse, or multi-residential property, understanding when snow becomes a problem – and how it should be addressed – is critical to protecting your roof and your building

Table Of Contents:
24/7 Snow Removals for Flat Roofs
Do You Always Need to Remove Snow from a Flat Roof?
Warning Signs Of Excessive Snow Build-Up
How To Remove Snow From Flat Roofs
Why Choose a Professional Roofer for Snow Removal?
What Does “Flat Roof Snow Load” Mean?
How Much Does Snow Weigh?
How Often Do Roofs Collapse from Snow Weight?
How To Plan for Winter Roof Safety

Quick Answer: Do Commercial Flat Roofs Need Snow Removal?

Yes- but only when conditions warrant it, and only by professionals.

A well-designed and properly maintained flat roof can safely support snow up to its engineered load capacity. However, snow should be professionally removed when accumulation becomes excessive, uneven, wet, or begins to interfere with drainage, rooftop systems, or structural performance.

Snow removal should never be handled by property staff or general snow contractors, it requires commercial roofing expertise and safety compliance.

24/7 Snow Removals for Flat Roofs

At Industrial Roofing Services Limited, we provide professional commercial roof snow removal services throughout Toronto, the GTA, and Southern Ontario – including 24/7 emergency flat roof repairs during severe winter conditions.

Our approach is not about clearing every inch of snow. It’s about strategic, controlled removal that:

• Reduces the risk of structural stress and overloading from excessive snow accumulation
• Protects roofing membranes and flashing
• Supports proper roof drainage by keeping scuppers and drains clear
• Reduces the risk of leaks and helps prevent water overload
• Focuses on removals around HVAC units, drains, and vents, lowering the chance of snow being drawn into equipment, which can lead to interior leaks or system damage

Proactive removal can extend the lifespan of the roof membrane by minimizing ice damming and freeze-thaw damage. We work across all major commercial flat roofing systems, including TPO, PVC, EPDM, Modified Bitumen, and Built-Up Roofing, and we coordinate with structural engineers when snow load thresholds are a concern.

Do You Always Need to Remove Snow from a Flat Roof?

No, not always. But in heavy and continued snowfalls, being proactive with your roof snow removal can save you from issues later down the line.

Flat roofs are designed to carry snow loads defined by the National Building Code of Canada (NBCC). Small amounts of dry, evenly distributed snow may not pose a risk.

However, professional snow removal is recommended when:

• Heavy and continued snowfall
• Snow becomes wet, compacted, or unevenly drifted
• Roof drains or scuppers are blocked or frozen
• Standing water forms beneath snow cover
• Freeze-thaw cycles increase ice formation
• Additional heavy snowfall is forecasted
• Structural load limits may be approached

Snow removal should never be attempted by property managers, maintenance staff, or tenants. Improper removal techniques can damage roofing membranes and increase structural risk.

Warning Signs of Excessive Snow Build-Up on Commercial Flat Roofs

After heavy snowfall or repeated freeze-thaw cycles, snow-related roof problems don’t always show up right away. In many cases, the impacts of snow and ice first show inside the building or around its exterior, not on the roof itself. The warning signs below can help you spot potential issues early – without needing to step onto the roof.

1. Water Sitting on the Roof After Snow Starts Melting

When the snow melts, the water should drain away fairly quickly. If it doesn’t, that water can sit on the roof and slowly work its way into weak spots.

What you might notice:

• Water dripping from the ceiling or light fixtures on upper floors
• Ceiling tiles that look darker, soft, or swollen
• Leaks that only appear during the day when temperatures rise
• Ongoing moisture issues after snowstorms

This is often a sign that snow or ice is blocking the roof’s drainage points.

2. Water Not Draining Away From the Building

When the snow melts, you should see water flowing away from the building through downspouts (the vertical pipes attached to the outside of the building).

What you might notice:

• No water is coming out of the downspouts during melting
• Large icicles are forming where downspouts exit the building
• Ice or water stains running down the outside of the building
• Puddles are forming close to the building instead of water flowing away

These signs suggest water is trapped above and can’t drain properly.

3. Ceilings That Look Lower, Uneven, or Bowed

Heavy snow can place extra weight on the roof structure. In some cases, that stress shows up inside the building before it’s visible anywhere else.

What you might notice:

• Ceiling tiles that suddenly look uneven
• Light fixtures or sprinkler heads sitting lower than normal
• Sections of the ceiling that look slightly curved or dipped
• Changes that weren’t there before the snow

Even small changes can be an early warning sign and shouldn’t be ignored.

4. New or Unusual Noises After Heavy Snow

Buildings naturally make some noise, but heavy snow can introduce new sounds caused by materials shifting under extra weight.

What you might notice:

• Creaking, cracking, or popping sounds
• Noises coming from the ceiling or roof area
• Sounds that happen at night or when temperatures change
• Reports of unusual noises from tenants or staff

These noises can be a sign that the structure is under stress.

5. Water Stains, Drips, or Damp Smells Indoors

Snow doesn’t have to fully melt to cause leaks. Even small amounts of moisture can enter through seams or flashings under snow cover.

What you might notice:

• Brown or yellow stains on ceilings or walls
• Active dripping after snow or ice begins to melt
• Damp or musty smells near the top floor
• Wet ceiling tiles or insulation in mechanical rooms

These are often the earliest visible signs of a snow-related roof issue.

6. Doors or Windows Suddenly Hard to Open or Close

In some cases, excess roof weight can cause slight shifts in the building structure.

What you might notice:

• Doors that start sticking or rubbing
• Windows that no longer close smoothly
• Small cracks forming near door or window frames
• Changes that appeared after heavy snowfall

While this doesn’t always mean a roof problem, it can be related to structural stress.

7. Snow Piled Higher in Certain Areas of the Roof

Wind can push snow into certain parts of the roof, causing uneven build-up.

What you might notice (from safe locations only):

• Snow is visibly piled higher near the rooftop equipment
• Snow collecting along the roof edges or walls
• Large icicles are forming below those areas
• The same spots are causing issues every winter

These areas often carry much more weight than the rest of the roof.

What Not to Do

Do not access the roof without professional clearance
Do not attempt to shovel or chip ice yourself
Do not allow general snow removal contractors onto the roof
Do not ignore small leaks or assume they will resolve on their own

How To Remove Snow From Flat Roofs

Commercial snow removal is a controlled roofing operation – not general snow clearing. Here’s what property managers should expect when working with professionals:

1. Pre-Removal Assessment

Before any snow is touched, we take time to understand the roof itself. The roofing contractor reviews roof plans, identifies drainage locations, rooftop equipment, and known weak points.

If there is any concern that the snow load could be approaching structural limits, a structural engineer may be consulted before removal begins. This ensures snow is removed in a way that relieves stress rather than shifting it to another part of the roof.

2. Safety Planning

The crew establishes safe access points to the roof and sets up fall protection systems in accordance with Ontario Working at Heights requirements. Safe locations for snow disposal are identified in advance so that snow can be moved off the roof without creating hazards at ground level.

3. Priority Snow Relief

Snow is not removed all at once or evenly across the roof. Instead, professionals focus first on areas that pose the greatest risk.

These typically include:

• Roof drains and drainage paths, so that melting snow can escape
• Areas where wind has caused deeper snow buildup
• Around rooftop equipment, where snow can trap water or add extra weight
• Low spots in the roof where water and snow naturally collect

By relieving pressure in these areas first, the overall load on the roof is reduced more safely and effectively.

4. Controlled Snow Removal

Once priority areas are addressed, the remaining snow is removed in a controlled manner. Roofing professionals use tools and techniques designed to protect the roof membrane, avoiding sharp or heavy equipment that could tear or puncture the surface.

Snow is removed gradually and evenly to prevent sudden load shifts. Importantly, snow is never piled or stored on the roof, even temporarily, as this can create new stress points.

5. Ground-Level Snow Management

As snow is removed from the roof, it must be placed somewhere safe at ground level. Our contractors ensure snow is deposited away from:

• Building entrances and exits
• Emergency access routes
• Fire lanes and loading areas
• Pedestrian walkways

On large sites or in dense urban areas, snow may need to be transported off-site to prevent congestion or safety issues around the building.

6. Post-Removal Inspection

Once snow removal is complete, the roof is inspected to confirm that:

• Drainage is functioning properly
• No damage occurred during removal
• Previously hidden issues are identified early

If any vulnerabilities or minor damage are discovered, they can be addressed immediately – helping prevent leaks or emergency repairs later in the winter.

Why Choose a Professional Roofer for Snow Removal?

Snow removal on a commercial flat roof isn’t a routine maintenance task – it’s a specialized roofing service that directly affects the safety, performance, and lifespan of your roof system.

Professional commercial roofers understand that removing snow incorrectly can cause as much damage as leaving it in place. That’s why trained roofing crews follow controlled methods that reduce weight without compromising the roof itself.

Experienced roofing professionals:

• Are Working at Heights certified, ensuring safe access and fall protection
• Understand how snow weight is distributed across a flat roof
• Know how to clear snow without damaging membranes, seams, or flashing
• Use tools and techniques designed specifically for roofing surfaces
• Recognize early warning signs of structural stress or membrane failure
• Carry proper commercial insurance and liability coverage

At Industrial Roofing Services Limited, snow removal is approached as part of a broader roof protection strategy – not a quick clear-off. With over 45 years of experience working on commercial and industrial flat roofs across Toronto, the GTA, and Southern Ontario, our team understands how winter conditions impact different roofing systems.

What Does “Flat Roof Snow Load” Mean?

Snow load refers to the temporary (live) weight imposed by snow and ice on a roof structure. Unlike permanent loads, snow load changes constantly due to:

• Snowfall amount and density
• Wind drifting
• Roof geometry
• Building heat loss
• Melting and refreezing

Snow load capacity is defined during building design and documented in construction drawings. When records are unavailable, structural engineers can calculate safe load thresholds.

Importantly, snow does not distribute evenly – drifting often concentrates weight near parapets, rooftop equipment, and transitions.

How Much Does Snow Weigh?

Snow weight varies significantly depending on moisture content:

• Light, dry snow: ~7-10 lbs per cubic foot
• Wet, compacted snow: up to 30 lbs per cubic foot

Rain, partial melting, and refreezing can dramatically increase weight – even when snow depth appears reduced. Ice weighs the same as water, but occupies less space, further increasing load concentration.

Ground snow depth does not reliably indicate rooftop snow load – roof conditions must be assessed directly.

How Often Do Roofs Collapse from Snow Weight?

Complete roof collapse from snow alone is rare, particularly on modern, well-maintained buildings. However, risk increases due to:

• Aging roof systems
• Poor drainage
• Deferred maintenance
• Structural modifications
• Prolonged or extreme winter conditions

More commonly, excessive snow causes structural deflection, which can damage:

• Sprinkler systems
• Mechanical lines
• Electrical conduits
• Interior finishes

These issues can be just as costly – and disruptive – as structural failure.

How To Plan for Winter Roof Safety

Snow removal is most effective when it’s part of a proactive winter roof management strategy, including:

• Pre-winter roof inspections
• Flat Roof drainage maintenance
• Defined snow-removal thresholds
• Emergency response planning

Industrial Roofing Services Limited works with property managers, facility teams, and engineers across Toronto, the GTA, and Southern Ontario to manage winter risks safely and professionally.

If snow accumulation on your commercial flat roof is a concern – or if you want to be prepared before the next storm – our team is ready to help.

Protect your roof. Reduce risk. Stay operational all winter.

The post Commercial Roof Snow Removals in Toronto, the GTA & Southern Ontario appeared first on Industrial Roofing.

A leaking commercial roof can feel overwhelming. Water is coming in, people are asking questions, operations might be disrupted – and every minute counts. What you do right now can make the difference between a small repair and major structural damage.

At Industrial Roofing Services Limited, we specialize in 24/7 emergency roof repair, leak investigation, and infrared moisture scanning for commercial and industrial buildings across Toronto, the GTA, and Southern Ontario. Below is a clear, step-by-step guide to follow the moment you discover a leak.

Immediate Steps To Take Once You Notice the Leak

When a commercial roof begins leaking, your immediate priority is safety and damage control – not repairs.

Do not go on the roof yourself and do not attempt any temporary patches. Wet commercial roofs are extremely slippery, visibility is often poor, and DIY fixes typically worsen the damage or void warranties. Only trained professionals with proper equipment should access the roof.

Instead, follow these clear, safe steps:

1. Stay Calm and Keep People Safe

Your first responsibility is to protect the people inside your building.

Take these actions as soon as you spot water:

• Restrict access to the affected area using cones, barriers, or caution tape. This prevents slips, falls, and accidental contact with electrical hazards.
• Place wet floor signs or temporary warning markers so staff, tenants, or visitors know to avoid the area.
• If water is near light fixtures, outlets, machinery, or electrical panels, shut off power to that specific zone (only if it can be done safely).
• Ensure that ceiling tiles that appear swollen or sagging remain undisturbed – they can collapse under pressure and should be treated as a hazard.

Your main goal at this stage is simply to reduce risk and prevent a minor leak from escalating into a workplace injury or emergency evacuation.

2. Contain Interior Water

You cannot stop the source of the leak from inside the building, but you can reduce the amount of internal damage.

Here’s what to do immediately:

• Place buckets, bins, or large containers directly under active drips to catch incoming water.
• Put down towels, absorbent pads, or plastic sheets to prevent pooling water from spreading across floors.
• Cover vulnerable equipment – computers, electrical panels, production equipment, or merchandise – with plastic sheeting or tarps.
• Remove or relocate high-value items, stored goods, paper documents, or electronics away from the affected area.
• If possible, close nearby HVAC vents or diffusers to prevent water from circulating into the ventilation system.

These actions won’t fix the leak, but they significantly reduce the risk of:

• Ceiling collapse
• Electrical issues
• Damaged equipment
• Mould and mildew
• Business downtime

Think of this as buying time until the emergency roofing crew arrives.

3. Identify the Location – Not the Cause

Commercial roof leaks rarely appear directly underneath the source. Water travels along joists, insulation, conduits, and decking before dripping inside, so the visible leak location is not where the problem originated.

So you don’t need to diagnose the issue yourself. Instead, simply track what you see, including:

• Which room, unit, or area is being affected
• Exact spots where water is entering
• Whether the leak is slow, steady, or worsening
• Any secondary issues such as:

1. Ceiling bubbles or sagging tiles
2. Moisture on walls
3. Wet insulation
4. Flooring saturation
5. Flooding or pooling

When you provide this information, our emergency team can prioritize the severity, determine potential roof areas to inspect, and prepare the correct equipment before arriving on-site.

4. Call a Professional Roofing Company Immediately

This is the most critical step after securing the interior.

Commercial roof leaks spread surprisingly fast. What begins as a small drip can become a structural issue within hours. Calling a qualified roofing company ensures the problem is addressed quickly and safely.

Industrial Roofing Services Limited provides:

• 24/7 emergency response for commercial and industrial buildings
• Technicians dispatched within a few hours of your call
• Expertise in all major systems: EPDM, TPO, PVC, Modified Bitumen, Built-Up Roofing
• Safe roof access using proper fall protection and commercial equipment
• Temporary emergency control measures that do not void warranties or compromise your roofing system

Our team will:

1. Locate the source of the leak
2. Prevent further water entry
3. Document the condition of your roof
4. Provide a clear plan for permanent repair

This professional intervention is essential for protecting your building, your staff, and your insurance claim.

5. Document the Damage

The moment you notice the leak, begin gathering evidence. This helps both your roofing company and your insurance provider assess the full scope of the damage.

Document the following:

• Photos and videos of all visible water damage (multiple angles are best)
• Close-ups of active drips or saturated materials
• Wide shots of the affected area to show context
• Water entry points (ceilings, wall seams, light fixtures, etc.)
• Inventory or equipment that has been damaged
• Any operational disruptions, such as shutdowns or restricted areas

If the leak is spreading, take multiple sets of photos over time to show progression.

The more documentation you collect now, the smoother your insurance and repair process will be later.

6. Review Your Roofing History

Anything you know about the roof will help professionals diagnose the issue faster and more accurately.

Gather any records you have access to:

• Maintenance logs
• Warranty documentation (system, membrane, flashing, material suppliers)
• Past inspection reports
• Previous leak history
• Notes about past issues such as:

1. Drain clogging
2. Membrane shrinkage
3. Flashing damage
4. Ponding water areas

This background information helps us quickly determine whether the leak is likely caused by:

• Aging or deteriorating materials
• A weather-related event
• Mechanical damage (service technicians, HVAC contractors, etc.)
• Improper drainage
• A failed seam or flashing
• Structural issues beneath the membrane

This step often shortens the investigation time and ensures the repair plan is accurate.

Filing an Insurance Claim: What You Need To Do

Insurance coverage for commercial roof leaks can vary significantly depending on your policy, the type of roof, and the cause of the damage. Acting quickly and following the proper steps not only helps protect your property but also ensures your claim is processed smoothly, reducing stress and unnecessary costs.

Here’s a step-by-step guide to help you navigate the process:

1. Document Everything – Start Immediately

As soon as you discover a leak, start documenting everything. Your insurance company will require evidence of:

• When the leak was noticed
• Where water entered and how quickly it spread
• The extent of damage to ceilings, walls, floors, and contents
• The likely cause of the leak (our professional roofing report will support this)
• Any steps you took to limit further damage

Collect the following:

• Photos and videos of all visible water damage, both close-up and wide-angle
• Receipts for temporary containment measures, like emergency cleanup or protective tarps
• Maintenance and inspection records to demonstrate the roof was cared for
• Inventory lists or equipment records detailing items that were affected

A certified roofing professional can often determine the actual source of the leak, which is frequently required by insurers before claims are approved. Proper documentation here saves time and prevents disputes later.

2. Contact Your Insurer Right Away

Call your insurance provider immediately to report the damage. Provide clear, factual information:

• Date and time the leak was discovered
• Type of damage observed (interior, exterior, structural, or equipment)
• Steps already taken to protect your building and occupants

During this conversation, ask:

• If this type of loss is likely covered under your policy
• How long you have to submit documentation
• Whether temporary measures are required before an adjuster arrives

TIP: Let them know Industrial Roofing Services Limited is on-site or scheduled. Insurance adjusters often appreciate knowing a professional contractor is involved, as it ensures proper safety and accurate documentation.

3. Complete Your Claim and Provide Documentation

Your insurer will provide a proof of loss form or an online claim submission portal. This is your opportunity to clearly demonstrate the situation.

Include:

• All photos and videos of the damage
• Findings from our emergency roof inspection, including infrared moisture detection if performed
• Receipts for any emergency mitigation measures, like temporary coverings or interior water containment
• Estimates for permanent repairs or replacement, if available

Being thorough and precise here reduces delays and increases the likelihood your claim will be processed without unnecessary back-and-forth.

4. Allow the Adjuster to Inspect the Damage

Once your claim is filed, an insurance adjuster will inspect the property. Their job is to:

• Confirm the source of the leak
• Verify the extent of damage to both structure and contents
• Review all documentation provided

TIP: Having a roofing professional present during the adjuster’s visit ensures nothing is overlooked. Our team can explain:

• The exact cause of the leak
• Why it occurred (storm, accidental damage, or mechanical failure)
• What repairs are necessary to prevent further issues
• Whether moisture has spread beyond visible areas, using infrared scanning if needed

This professional presence often results in a smoother, faster claim settlement.

When Roof Leaks Are Covered Vs Not Covered By Insurance

When Commercial Roof Leaks ARE Typically Covered

Insurance generally covers roof leaks that are:

• Caused by storms (wind, heavy rain, hail)
• The result of sudden, accidental damage
• Due to vandalism
• Caused by falling trees or debris
• Resulting from unexpected mechanical damage (e.g., HVAC equipment failure or contractor accident)

The key principle is that the damage must be sudden and accidental, not gradual.

When Roof Leaks Are Often NOT Covered

Insurance usually does not cover leaks that result from:

• Long-term wear and tear on the roofing materials
• Neglected routine maintenance, including clogged drains or unchecked flashing
• Failure to inspect or maintain the roof, leading to preventable leaks
• Old age of the roof, beyond its expected lifespan
• Known issues that were left unaddressed

This is why regular inspections and proactive maintenance plans are critical – insurers often request logs or proof of maintenance before approving claims. Proper maintenance not only prevents leaks but also ensures your roof remains insurable.

How To Prevent Future Leaks

Once your emergency leak has been addressed, the next priority is making sure it doesn’t happen again. Preventative action protects your property, minimizes downtime, and reduces insurance claims.

Here’s what we recommend to every commercial property owner:

1. Schedule Regular Professional Roof Inspections

Routine inspections for commercial roofs are the cornerstone of a long-lasting roof. Even a small issue, if left unchecked, can turn into a costly emergency.

Recommended inspection schedule:

• Twice per year: Once in the spring and once in the fall, to catch damage from winter freeze-thaw cycles or spring storms.
• After major storms or severe weather events: High winds, hail, and heavy rain can cause hidden damage that may not be immediately visible.

Why professional inspections matter:

Industrial Roofing Services Limited provides comprehensive inspections for all major commercial roofing systems (EPDM, TPO, PVC, Modified Bitumen, BUR). Our team checks for:

• Punctures or membrane separations
• Loose or damaged flashing
• Signs of ponding or blocked drainage
• Potential weak points around roof penetrations

Early identification allows for timely repairs, preventing small issues from becoming emergency situations.

2. Invest in Infrared Moisture Scanning

Moisture damage is often invisible until it becomes severe. Water can travel laterally under roofing membranes for months before you see leaks indoors.

Infrared moisture scanning provides a non-invasive way to detect these hidden problems early. Benefits include:

• Detecting hidden moisture before it compromises the roof structure
• Preventing mould growth and protecting indoor air quality
• Avoiding insulation degradation, which can reduce energy efficiency
• Prioritizing repairs based on actual severity, saving costs

Infrared scanning is one of the most cost-effective tools for long-term roof health and is particularly useful in flat roofing systems prone to ponding or slow leaks.

3. Keep Drains, Gutters, and Scuppers Clear

Blocked drainage systems are one of the leading causes of commercial roof leaks in Southern Ontario. Standing water (ponding) not only increases leak risk but also speeds up membrane deterioration, potentially resulting in the replacement of your flat roof.

Regular maintenance should include:

• Clearing debris from drains, gutters, and scuppers
• Checking for ice buildup in winter
• Ensuring proper water flow away from the roof surface
• Inspecting for damage to downspouts and drainage channels

Consistent maintenance reduces pressure on the roof, prevents seasonal overflow, and protects against structural damage caused by prolonged water exposure.

4. Maintain a Roof Asset Management Plan

A structured roof management plan is essential for proactive property management.

A complete plan should include:

• Inspection schedules (routine and post-storm)
• Repair and maintenance timelines
• Warranty documentation and expiry tracking
• Drainage and scupper checks
• Historical maintenance and leak records

Property managers with a documented plan experience fewer emergency leaks, more predictable repair costs, and longer roof lifespans. This also demonstrates diligence to insurers, which can support future claims if needed.

5. Act Quickly on Minor Issues

Even small problems can escalate rapidly. A minor puncture, loose flashing, or slight membrane separation can turn into a major leak if ignored.

Proactive repair strategies include:

• Addressing minor membrane damage immediately
• Repairing loose flashing or failed seams before water penetrates
• Clearing small debris or blockages that may cause ponding

Benefits of acting quickly:

• Longer roof lifespan and fewer major replacements
• Reduced insurance claims, as routine maintenance is evident
• Fewer unexpected disruptions to operations or tenants

Remember, in commercial roofing, prevention is always cheaper than emergency repair. Acting early protects your investment, your staff, and your business operations.

Call Industrial Roofing Services Limited For 24/7 Assistance!

A leaking roof can feel like a crisis – but with the right steps and the right partner, you can protect your building, minimize damage, and restore safety quickly.

Industrial Roofing Services Limited is here to help with:

• 24/7 Emergency Roof Repair
• Rapid Response (Team Dispatched Within Hours)
• Leak Investigation
• Infrared Moisture Scanning
• Preventative Maintenance Programs

If your commercial roof is leaking or you suspect hidden moisture, call us immediately. The faster we respond, the more we can save.

The post What To Do If Your Commercial Roof Is Leaking: Immediate Steps appeared first on Industrial Roofing.

But here’s the hard truth: over 60% of commercial roof warranty claims are denied, not because the roof failed unfairly, but because the warranty was unknowingly voided by preventable mistakes.

The good news? Most of these pitfalls are completely avoidable – if you know what to watch for.

In this guide, we’ll walk you through the top mistakes that void commercial roof warranties in Ontario, explain why they matter, and, most importantly, show you exactly how to avoid them. Whether you’re overseeing a warehouse in Mississauga, a retail plaza in Brampton, or an industrial facility in Concord, this is the only resource you’ll need to safeguard your roofing investment.

Types Of Commercial Roofing Warranties:

Commercial roofing warranties typically come in two forms:

• Manufacturer warranties (covering materials like TPO, EPDM, or modified bitumen membranes)
• Workmanship warranties (covering the contractor’s installation quality)

Both can be invalidated – even if your roof was “brand new” just a few years ago.

Mistakes That Will Void Your Roofing Warranty Coverage

1. Hiring a Non-Certified or Non-OIRCA Contractor

Most major manufacturers (like GAF, Firestone, or Siplast) require that their roofing systems be installed only by factory-certified contractors. If your installer isn’t certified, your manufacturer’s warranty is void from day one – even if the materials are perfect.

In Ontario, there’s another layer: if your contractor is a member of the Ontario Industrial Roofing Contractors’ Association (OIRCA), they’re bound by strict standards. OIRCA members must provide a standard 2-year workmanship warranty for roofing and 1-year for sheet metal, and they can’t offer longer terms. But here’s the catch: using a non-OIRCA contractor doesn’t automatically give you better coverage, it just means their warranty terms aren’t standardized, which can lead to loopholes or unenforceable promises.

How to avoid it:

• Always verify that your contractor is certified by the manufacturer of the roofing system you’re installing.
• Ask if they’re an OIRCA member – this signals adherence to provincial industry standards.
• Request proof of certification and check it directly with the manufacturer if needed.

2. Skipping Required Inspections or Failing to Register the Warranty

Extended commercial warranties – especially No Dollar Limit (NDL) or pro-rated system warranties – often require mandatory inspections at key stages: during installation, after completion, and sometimes annually. Miss one, and the warranty may be void.

Similarly, many manufacturers require online or paper registration within 30–90 days of installation. If this step isn’t completed (and it’s often the contractor’s responsibility), your warranty doesn’t exist, even if you paid for it.

How to avoid it:

• Get a written schedule of all required inspections and registration deadlines.
• Confirm with your contractor that registration has been submitted – and keep a copy of the warranty certificate.
• Set calendar reminders for annual inspections if your warranty requires them.

3. Allowing Unauthorized Roof Modifications

Need to add HVAC units, solar panels, satellite dishes, or new roof hatches? These are common on commercial buildings – but if they’re installed by anyone other than your original roofing contractor (or without manufacturer approval), you’ve just voided coverage in that area – and possibly the entire roof.

Why? Because membrane roofs are sealed systems. Drilling, cutting, or flashing a penetration incorrectly compromises the integrity of the entire assembly. Manufacturers won’t cover leaks around an unauthorized rooftop unit – even if the rest of the roof is fine.

How to avoid it:

• Never allow third-party vendors (HVAC techs, solar installers, etc.) to cut into your roof without prior coordination with your roofing contractor.
• Request that your roofer install all flashing and penetrations as part of the original job, or return to handle modifications under warranty.
• If modifications are needed later, contact your original contractor first and get written confirmation that the work won’t void coverage.

4. Neglecting Routine Maintenance

Commercial warranties almost always include a “duty to maintain” clause. This means you’re responsible for keeping drains clear, removing debris, inspecting for ponding water, and addressing minor issues before they escalate.

For example, if leaves clog your roof drains for months, leading to standing water that exceeds 48 hours (a common threshold in membrane warranties), the resulting membrane failure won’t be covered – even if the material itself is defect-free.

How to avoid it:

• Implement a biannual roof maintenance plan (spring and fall), plus post-storm checks.
• Keep detailed logs of all inspections, cleanings, and minor repairs – these records are crucial if you file a claim.
• Consider hiring your original contractor for maintenance – they understand your system and can spot warranty-threatening issues early.

5. Using the Wrong Repair Methods or Materials

A small leak doesn’t mean you should grab the nearest patch kit or call a handyman. DIY repairs or using non-approved materials (like generic sealants or mismatched membrane patches) are considered “unauthorized alterations” and instantly void coverage.

Even worse: some temporary fixes trap moisture beneath the membrane, accelerating decay and making the original problem far worse.

How to avoid it:

• Never attempt DIY repairs on a commercial flat roof.
• Only allow factory-trained technicians to perform repairs using manufacturer-approved materials from the same system.
• If you have an emergency leak in your flat roof, call a qualified commercial roofer, don’t “band-aid” it and hope for the best.

6. Installing Over an Existing Roof Without Approval

While “re-covering” (installing a new membrane over an old one) can save money upfront, most manufacturers void warranties if this is done without engineering approval – especially if the existing roof is wet, damaged, or lacks proper slope.

Ontario building codes also restrict re-covering in many cases. If your roof deck isn’t inspected and prepared correctly, the new system can fail prematurely, and your warranty won’t cover it.

How to avoid it:

• Always opt for a full tear-off and inspection unless a structural engineer and manufacturer both approve a re-cover.
• Ensure your contractor provides documentation that the substrate meets warranty requirements.

7. Ignoring Ventilation and Drainage Requirement

Flat roofs rely on proper slope and drainage to shed water. If your roof has ponding water for more than 48 hours after rainfall, many warranties consider this a maintenance failure.

Similarly, poor ventilation in roof assemblies (especially on buildings with occupied attic spaces or mechanical rooms) can lead to condensation, insulation saturation, and membrane delamination, none of which are covered if deemed preventable.

How to avoid it:

• Ensure your roof was designed with adequate slope (minimum ¼” per foot) and functional drains/scuppers.
• Inspect for standing water after every rain event.
• Address low spots with tapered insulation or slope correction. Please don’t ignore them.

Maintain Your Roofing Warranty With IRSL

A commercial roof warranty isn’t a “set it and forget it” safety net. It’s a contract with responsibilities on both sides. By avoiding these common mistakes, you keep your coverage intact and your property protected.

And remember: the best warranty in the world won’t help if your contractor cuts corners or vanishes after the job is done. Choose a reputable, certified, and locally experienced roofing partner who understands Ontario’s climate, codes, and commercial roofing standards.

Need a Warranty-Safe Roofing Partner in the GTA?

At Industrial Roofing Services Limited, we’re a Concord-based commercial roofing contractor serving Toronto, the GTA, and Southern Ontario with certified installations, OIRCA-aligned workmanship warranties, and proactive maintenance plans designed to keep your roof – and your warranty – in full force.

If you’re planning a repair, replacement, or emergency leak fix, contact us today for a FREE flat roof inspection. We’ll make sure your roof meets every manufacturer’s requirement, so your warranty stays valid for years to come.

The post Top Mistakes That Void Your Roof Warranty (And How To Avoid Them) appeared first on Industrial Roofing.

Table Of Contents:
Why Good Drainage Is So Important
1. Interior Drains
2. Scuppers
3. Gutters
4. Downspots
Evaluate Your Roof For The Best Drainage Solution

Why Good Drainage Is So Important For Flat Roofs

Picture this: winter rains, melting snow, and – oh yes – spring thunderstorms. If your flat roof doesn’t move water efficiently, everything slows down. Water starts to sit. Debris accumulates. The tar, caulking, and membranes begin to deteriorate. And then, voilà, your roof has become a liability, not an asset.

Poor drainage doesn’t just damage the surface, it can affect the building itself. Walls, foundations, and even insulation suffer. Ponding water adds weight (seriously, a single inch across a large commercial roof can weigh over a hundred pounds per 20 square feet). Over time, that extra load stresses the structure, sometimes leading to collapse if it’s bad enough.

So, in short? Good drainage isn’t optional. It’s survival. It keeps your roof long-lived, your property safe, and your wallet…less traumatized.

1. Interior Drains

Think of interior drains as the unsung heroes of commercial roofing. Hidden within the roof or parapet walls, these drains quietly pull water away, kind of like a rooftop vacuum. You don’t see them, but you’ll definitely notice when they’re missing or clogged.

How They Work:

Water gathers at the low points of the roof (because, yes, even flat roofs aren’t perfectly flat, they’re subtly pitched). The interior drain collects it, funnelling it into piping hidden below, safely away from walls and surfaces.

Benefits:

• Protects walls and foundations from water damage.
• Pipes are insulated naturally by the building, so freezing isn’t usually an issue.
• Customizable for aesthetics – no clunky pipes interrupting the building’s lines.

Cons:

• Installation and maintenance are pricey.
• Hard to inspect without a professional – don’t try to DIY this one.
• Even small debris can cause major clogs, so vigilance is key.

There Are 2 Types Of Interior Drainage Systems

1. Gravity Drainage System

This is the classic approach. Water flows naturally, downhill – into the interior drain, and then down through pipes to the ground. It’s reliable, simple, and works best for smaller commercial roofs (think under 150 m² per drain). The system is low-tech but effective, provided your roof is designed with positive drainage (aka a slight slope).

2. Siphonic Drainage System

Fancy a system that feels a little futuristic? That’s siphonic drainage. It doesn’t rely on slope. Instead, it creates a low-pressure vacuum inside the pipes. Water is pulled in fast, like nature got a little turbo boost. This is perfect for larger commercial buildings – warehouses, malls, airports – anywhere the sheer volume of water could otherwise overwhelm a gravity system. Fewer pipes, flatter slope, and rapid drainage, what’s not to like? Just remember, maintenance is still necessary to keep debris from blocking the high-speed flow.

When Are Interior Drains Recommended?

Interior drains are best suited for large commercial or industrial buildings with broad, flat roofs – places like warehouses, malls, or office complexes. They’re ideal when you want all drainage components hidden inside the structure, keeping exterior walls clean and uncluttered. Because they’re protected from the elements, interior drains also make sense for buildings in colder regions, where freezing could cause problems for external systems.

2. Scuppers

Scuppers are simple, yet incredibly effective. Picture them as rooftop exit doors for water – small wall openings that give trapped rain a clean escape route. Installed through the parapet walls or roof edges, they allow water to flow off the roof instead of pooling. Typically, this water is directed into a protective metal chute, downspout, or gutter system below, ensuring it’s safely carried away from the building’s foundation.

What makes scuppers so clever is their simplicity. There are no complex pipes running through the building, no hidden drains to maintain – just an open outlet that uses gravity to do the work. They’re often lined or fabricated with corrosion-resistant metals like aluminum or galvanized steel, giving them both function and a subtle architectural appeal. In many commercial buildings, scuppers are paired with leader heads or decorative spouts to control water flow and reduce splashing, combining practicality with a clean visual finish.

Benefits:

• Affordable and low-maintenance.
• Large openings rarely clog if designed correctly.
• It can add a touch of architectural flair.

Cons:

• Exposed to winter freezing, pipes and channels can freeze.
• Debris in the leader pipe can still cause problems.
• Not ideal if your roof has tight corners or minimal wall space.

When Are Scuppers Recommended?

Scuppers shine on commercial buildings with a moderate slope or smaller footprint roofs. They’re best when you want a low-cost, simple, and durable solution – but not on massive flat expanses where water volume could overwhelm them.

3. Gutters

Sure, gutters are more common on residential homes, but that doesn’t mean they’re off-limits for commercial use. On smaller buildings with short roof spans or mild slopes toward the edges, gutters can actually do a fine job managing runoff.

They’re typically mounted along the roof perimeter, collecting water as it sheets off the membrane surface and channelling it into downspouts. Simple, visible, and easy to maintain.

The catch (pun intended) is that gutters depend on gravity and open exposure, so they’re not ideal for large flat roofs that collect vast volumes of water in heavy storms. Still, for low-rise retail units, small offices, or older brick buildings that already have architectural eaves, gutters can be a practical and budget-friendly drainage option, nothing fancy, but dependable if kept clean.

Benefits:

• Cost-effective and widely available.
• Protects walls, windows, and foundations.
• Can handle some debris and even clean themselves a little with rainfall.

Cons:

• Open to the elements, leaves and twigs can jam them.
• Must be regularly maintained, especially in the fall.
• Susceptible to ice and cracking in winter.

When Are Gutters Recommended?

Flat roofs with a slight edge slope can benefit from gutters, especially when paired with downspouts and properly sized openings. They’re excellent for smaller commercial properties or buildings where aesthetics matter.

4. Downspouts

Downspouts are the unsung sidekicks to gutters and scuppers, the vertical exit route that actually gets the water off your building. Once the runoff hits the roof edge, it needs somewhere to go, and that’s where downspouts take over, carrying water safely from the roof to ground level or into a stormwater system.

In most commercial applications, these are rigid aluminum or galvanized steel pipes strapped to the exterior walls. You’ll see them often on smaller commercial plazas, schools, and older flat-roofed structures where interior drainage isn’t worth the cost or complexity.

Functionally, they’re simple. But the trick is in quantity and sizing: too few, and they’ll overflow in a heavy downpour; too small, and they’ll clog faster than you can say “spring thaw.” Despite their simplicity, a well-placed downspout system can mean the difference between a dry façade and years of water staining or brick spalling.

Benefits:

• Prevents exterior wall damage and mould growth.
• Keeps foundations dry.
• Cost-effective and easy to install on most commercial buildings.

Cons:

• It can clog if not maintained.
• May need multiple downspouts for larger roofs.
• Exterior placement exposes them to freezing and impact damage.

When Are Downspouts Recommended?

Downspouts are best for commercial buildings of all sizes, but work particularly well when combined with gutters or scuppers for a complete edge-drain solution.

How To Evaluate Your Roof To Decide On The Best Drainage Solution For You

Step One:

Don’t climb up there yourself. Seriously. Safety first – Ontario winters, slippery membranes, and steep parapets are no joke.

Step Two:

Call the pros. We recommend our licensed team at Industrial Roofing Services Limited to conduct a thorough roof inspection. Not only do we ensure your safety, but we also evaluate slope, ponding issues, membrane condition, and potential drainage paths.

Step Three:

Assess the roof’s specifics. Things to look for:

Low spots where water collects (ponding areas).

Existing drains or scuppers and their condition.

Debris accumulation and potential clog points.

Roof slope and size – large commercial roofs may require siphonic systems.

Step Four:

Match drainage solutions to your roof. Based on the inspection, you’ll decide: interior drains, scuppers, gutters, downspouts, or a combination. Larger footprints? Consider siphonic drains. Tight edges? Scuppers or gutters may be best.

Step Five:

Schedule maintenance plans. Drainage systems aren’t “set it and forget it.” Debris, leaves, and seasonal changes mean regular inspections and cleaning are non-negotiable.

And remember, while DIY can be tempting, a professional inspection isn’t just a recommendation, it’s a critical step to avoid expensive water damage, structural stress, and headaches down the line.

Industrial Roofing Services Limited has been keeping Toronto, GTA and Southern Ontario roofs high and dry for over 45 years. From flat roof replacement to emergency leak services, our licensed, insured team ensures your drainage systems are installed correctly and maintained efficiently – saving you money, time, and stress.

Call us today at (905) 760-0735 to book a FREE consultation or inspection. Let’s keep your roof doing what it does best: protecting your building.

The post How To Improve Flat Roof Drainage appeared first on Industrial Roofing.