TPO Roofing Pickering: 6,500 Sq Ft Re-Roof at Devi Mandir
Two old layers of modified bitumen and a coating came off, and a new 60 mil TPO roof went on, with a 20-year warranty on labour and materials.
Call 1-833-775-7663 Pickering · 60 mil TPO · 20 years on labour and materials
Karol Rajkowski
Vice President, OYH Roofing
Published February 18, 2025 · Updated October 1, 2026 · 5 min read
At a glance
In this TPO roofing Pickering project, OYH Roofing re-roofed the Devi Mandir temple in Pickering, Ontario. The crew tore off two existing layers of modified bitumen and the coating on top, then installed a 60 mil TPO system across 6,500 square feet. The roof carries a 20-year warranty on labour and materials.
Project details
This TPO roofing Pickering project covered a 6,500 square foot roof on a temple. Here is the TPO roofing Pickering job in one table.
| Item | Detail |
|---|---|
| Client | Devi Mandir |
| Location | Pickering, Ontario |
| Building type | Temple (institutional) |
| Roof area | 6,500 sq ft |
| Service | Tear-off of two modified bitumen layers and a coating, then re-roof |
| System | 60 mil TPO single-ply membrane |
| Warranty | 20 years on labour and materials |
When does a coated, layered roof need a full tear-off?
A coated, layered roof needs a full tear-off when the membrane under the coating has reached the end of its life, because another coating or another layer only covers the problem.
The old roof on this temple had been built up over the years: two layers of modified bitumen with a coating applied on top. A coating can extend the life of a sound roof, and it costs less than a replacement, but it cannot fix a membrane that has already failed. On this TPO roofing Pickering job the old layers and the coating were removed before the new roof went on. Here are the signs we look at on TPO roofing Pickering jobs.
| What the roof shows | What it usually means | Usual direction |
|---|---|---|
| One sound layer, surface wear only | The membrane still has life in it | Repair or coating |
| More than one existing layer | Extra weight on the structure, and moisture can be trapped between layers | Tear-off |
| A coating over a failing membrane | The coating is hiding the problem, not fixing it | Tear-off |
| Soft or spongy areas underfoot | Often wet insulation or a damaged deck | Tear-off, with deck repairs as needed |
| Leaks that keep moving | The system as a whole is at the end of its life | Tear-off |
Why 60 mil TPO for a temple roof in Pickering?
A 60 mil TPO membrane suits a community building because its seams are welded with hot air, its white surface reflects summer heat, and it needs little upkeep once it is installed.
TPO (thermoplastic polyolefin) is a single-ply membrane. Mil is the thickness, one thousandth of an inch, so a 60 mil sheet is thicker than the 45 mil sheets used on lighter-duty roofs. On a temple, a leak disrupts services and damages the interior, so durability matters. TPO is not the right answer for every building, so here is how it compares with the other systems we install.
| System | Layers | Where it wins | Where another system wins |
|---|---|---|---|
| 60 mil TPO | Single ply, hot-air welded seams | Welded seams, reflective white surface, light weight | One layer; modified bitumen is tougher under heavy foot traffic |
| 2-ply modified bitumen | Base sheet plus cap sheet | Toughest underfoot, two layers of protection | Heavier, and a dark surface absorbs more summer heat |
| Roof coating | Liquid applied over the existing roof | Costs less than a replacement | Shorter-lived, and only works over a sound membrane |
Industry guidance from the National Roofing Contractors Association points to the details on single-ply roofs: seam quality and the flashings at curbs, drains, vents and parapets decide how long the roof lasts.
What does the 20-year labour and materials warranty cover?
This TPO roofing Pickering 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, as on any TPO roofing Pickering project. Ask for the warranty document for your project and keep it with the building records.
How do you maintain a TPO roof on a community building?
A TPO roof needs an inspection at least twice a year, in spring and fall, plus a check after major storms. Temples, churches and community centres often have small maintenance budgets, so a short, fixed routine works best on any TPO roofing Pickering project.
| When | What to check |
|---|---|
| Spring, after the snow melts | Seams, flashings, drains, any damage from ice or ponding |
| Fall, before winter | Clear drains and scuppers, check flashings at curbs and parapets |
| After major storms | Wind or debris damage, blocked drains |
| Every rooftop service visit | Crews stay on walkway pads; keep oils and grease off the membrane |
Staff and volunteers 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 TPO roofing Pickering client.
Photos of the roof
Photos of this TPO roofing Pickering project at Devi Mandir.
TPO roofing Pickering services from OYH Roofing
OYH Roofing takes on TPO roofing Pickering projects from its Oakville head office and installs industrial, commercial and institutional flat roofs across the Greater Toronto Area and the rest of Ontario.
Our commercial roofing services cover TPO, PVC, EPDM, modified bitumen and built-up roofing, plus inspections and commercial roof leak repair. The same 60 mil TPO went on the 50,000 square foot roof at Millomat Stampings in Mississauga, and you can see the rest of our work on the completed projects page.
Planning TPO roofing work in Pickering?
For TPO roofing Pickering 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
Can a coated modified bitumen roof be overlaid instead of torn off?
A coated modified bitumen roof can sometimes be overlaid, but not when there are already two layers and the membrane underneath has failed. At Devi Mandir in Pickering, both layers of modified bitumen and the coating were torn off, and a new 60 mil TPO system was installed across the 6,500 square foot roof.
How long does a 60 mil TPO roof last?
A 60 mil TPO roof commonly lasts 20 years or more when it is installed as a full system and inspected twice a year. The Devi Mandir roof carries a 20-year warranty on labour and materials, which reflects that expected service life. Blocked drains, punctures from foot traffic and skipped inspections are what usually shorten it.
Is a roof coating cheaper than a roof replacement?
A roof coating is cheaper than a roof replacement, but it is shorter-lived and it only works over a membrane that is still sound. Over a failed membrane, a coating hides the problem for a while and the leaks come back. A roof assessment by a commercial roofer shows which option fits your building.
What is the difference between 45 mil and 60 mil TPO?
The difference between 45 mil and 60 mil TPO is thickness. A mil is one thousandth of an inch, so a 60 mil membrane is one third thicker than a 45 mil membrane. The thicker sheet gives more resistance to punctures, which is why 60 mil was used on the Devi Mandir roof.
Does OYH Roofing work on temples, churches and community buildings?
OYH Roofing works on temples, churches and community buildings, and the 6,500 square foot re-roof at Devi Mandir in Pickering 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, Devi Mandir, Pickering (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