Industrial Roofing Mississauga: 53,000 Sq Ft Roof Recover
The old roof came off and a new 2-ply modified bitumen system went on a 53,000 square foot industrial building, with a 20-year warranty on labour and materials.
Call 1-833-775-7663 Mississauga · 2-ply modified bitumen · 20 years on labour and materials
Karol Rajkowski
Vice President, OYH Roofing
Published September 16, 2025 · Updated October 1, 2026 · 5 min read
At a glance
In this industrial roofing Mississauga project, OYH Roofing recovered a 53,000 square foot industrial space. The crew removed the existing roofing system and installed a new 2-ply modified bitumen system in its place. The finished roof carries a 20-year warranty on labour and materials.
Project details
This industrial roofing Mississauga project covered a 53,000 square foot low-slope roof. Here is the industrial roofing Mississauga job in one table.
| Item | Detail |
|---|---|
| Location | Mississauga, Ontario |
| Building type | Industrial |
| Roof area | 53,000 sq ft |
| Service | Roof recover: existing system removed, new system installed |
| System | 2-ply modified bitumen (base sheet and cap sheet) |
| Warranty | 20 years on labour and materials |
Why a recover instead of more repairs?
A recover is the right call when the membrane itself is worn out, and repairs are the right call when the roof is sound and only a few details have failed.
Large industrial roofs take a beating from rooftop equipment, service crews, ponding water and years of freeze-thaw cycles. At some point a roof has been patched so often that the leaks simply move. On this industrial roofing Mississauga job, the existing system was removed and replaced across the full 53,000 square feet rather than patched again. Here is how the two options compare.
| Question | Repair fits when | Recover fits when |
|---|---|---|
| Where are the leaks? | At one or two details, such as a flashing or a drain | In many places, or they move after each patch |
| What shape is the membrane in? | Sound, with wear only at specific points | Worn out, with seams failing in several areas |
| What about the warranty? | The existing warranty, if any, continues | A new full system can carry a new warranty |
| Where does the other option win? | A recover costs more up front | Repeated repairs cost more over the years |
Why 2-ply modified bitumen for industrial roofing in Mississauga?
A 2-ply modified bitumen system suits industrial roofing Mississauga owners rely on because it has two layers of protection, it handles foot traffic from service crews, and it stays flexible through Greater Toronto Area winters.
Modified bitumen is an asphalt-based membrane reinforced with polyester or fiberglass and modified with polymers. The base sheet does the primary waterproofing and the granulated cap sheet protects it from sun and weather. If the cap sheet is ever damaged, the base sheet is still there. It is heavier than a single-ply roof, and a white TPO roof reflects more summer heat, so it is not the answer for every building. Our modified bitumen vs TPO guide compares the two systems side by side.
The membrane is the easy part of the job. Industry guidance from the National Roofing Contractors Association points to the details on low-slope roofs: seam overlaps, flashings at curbs and parapets, and the connections at every drain.
What does the 20-year labour and materials warranty cover?
This industrial roofing Mississauga project carries a 20-year warranty on labour and materials, so both the membrane and the workmanship are covered.
The exact coverage, and what the owner has to do to keep it valid, is set by the written warranty terms. That usually includes regular inspections and keeping records of any work done on the roof. Ask for the warranty document for your project and keep it with the building records, as every industrial roofing Mississauga owner should.
How do you maintain a modified bitumen industrial roof?
A modified bitumen industrial roof needs an inspection at least twice a year, in spring and fall, plus a check after major storms.
| When | What to check |
|---|---|
| Spring, after the snow melts | Seams, flashings, drains, any damage from ice or ponding |
| Fall, before winter | Clear drains and debris, check flashings at curbs and parapets |
| After major storms | Wind or debris damage, blocked drains |
| Every rooftop service visit | Crews stay on walkways; log who was on the roof and why |
Building staff should not walk the roof themselves, especially in winter or wet weather. Book the inspection and let a roofing crew do it with proper fall protection. We offer inspections to every industrial roofing Mississauga client.
Photos of the finished roof
Photos of this industrial roofing Mississauga project after the new roof was finished.
Industrial roofing Mississauga services from OYH Roofing
OYH Roofing handles industrial roofing Mississauga projects from its Oakville head office, next door to the city, and installs industrial, commercial and institutional flat roofs across Ontario.
Our commercial roofing services cover modified bitumen, TPO, PVC, EPDM and built-up roofing, plus inspections and commercial roof leak repair in Mississauga. Other Mississauga work includes the City of Mississauga building at 3185 Mavis Rd and the Millomat Stampings TPO roof. See the rest on the completed projects page.
Planning industrial roofing work in Mississauga?
For industrial roofing Mississauga work, tell us about the building and we will set up a free roof assessment and a written quote.
Call 1-833-775-7663Request an assessmentFrequently asked questions
What is a roof recover?
On this project, a roof recover meant removing the existing roofing system and installing a new 2-ply modified bitumen system across the full 53,000 square feet. Contractors use the word in different ways, so ask exactly what is being removed and what is being installed before you compare quotes for your own building.
How long does a 2-ply modified bitumen industrial roof last?
A 2-ply modified bitumen industrial roof commonly lasts 20 years or more when it is installed as a full system and inspected twice a year. This Mississauga roof carries a 20-year warranty on labour and materials, which reflects that expected service life. Blocked drains, foot traffic damage and skipped inspections are what usually shorten it.
When should an industrial roof be replaced instead of repaired?
An industrial roof should be replaced instead of repaired when the membrane is worn out, seams are failing in several areas, or leaks keep moving after each patch. Repairs make sense when the roof is sound and the problem is limited to a few details. A roof assessment by a commercial roofer settles which case applies.
Is modified bitumen a good choice for industrial roofs in Mississauga?
Modified bitumen is a good choice for industrial roofs in Mississauga because its two layers resist leaks and ponding water, it tolerates foot traffic from equipment service crews, and it stays flexible through freeze-thaw cycles. A white TPO roof reflects more summer heat, so the best system depends on the building.
Does OYH Roofing handle industrial roofing projects of this size?
OYH Roofing handles industrial roofing projects of this size, and this 53,000 square foot recover in Mississauga is one example. The company is based at 2120 Speers Rd in Oakville and installs, repairs and inspects industrial, commercial and institutional flat roofs across Ontario. Call 1-833-775-7663 to book an assessment.
Karol Rajkowski
Vice President · OYH Roofing
Karol Rajkowski is Vice President of OYH Roofing, an Oakville-based ICI flat-roofing contractor whose projects include the City of Mississauga building at 3185 Mavis Rd and the Marriott Hotel in Vaughan. Learn more about the OYH team.
Sources
- OYH Roofing project record, Mississauga industrial recover (October 2026).
- National Roofing Contractors Association (NRCA), guidance on low-slope roof inspection and maintenance.
OYH Roofing, 2120 Speers Rd, Oakville, ON L6L 2X8 · 1-833-775-7663 · info@oyhroofing.ca