Vaughan Commercial Roofing: 15,000 Sq Ft Marriott Hotel Roof
A 2-ply modified bitumen roof on the new-build Marriott Hotel in Vaughan, with a 20-year warranty on labour and materials.
Call 1-833-775-7663 Vaughan · 2-ply modified bitumen · 20 years on labour and materials
Karol Rajkowski
Vice President, OYH Roofing
Published February 28, 2025 · Updated October 1, 2026 · 5 min read
At a glance
In this Vaughan commercial roofing project, OYH Roofing installed a 2-ply modified bitumen roofing system across 15,000 square feet on the new-build Marriott Hotel in Vaughan, Ontario. It was a new-construction installation on a low-slope hotel roof, and the finished roof carries a 20-year warranty on labour and materials.
Project details
This Vaughan commercial roofing project covered a 15,000 square foot low-slope roof on a new hotel. Here is the job in one table.
| Item | Detail |
|---|---|
| Project | Marriott Hotel |
| Location | Vaughan, Ontario |
| Building type | Hotel, new build |
| Roof area | 15,000 sq ft |
| Service | New-construction roofing installation |
| System | 2-ply modified bitumen (base sheet and cap sheet) |
| Warranty | 20 years on labour and materials |
Why modified bitumen for Vaughan commercial roofing on a hotel?
Modified bitumen suits Vaughan commercial roofing on a hotel because its two layers give a second line of defence against leaks, it stands up to foot traffic from service crews, and it stays flexible through Greater Toronto Area freeze-thaw cycles.
A hotel roof is a working platform. It carries HVAC units, exhaust fans and other mechanical equipment, crews visit it regularly, and any leak lands on guest rooms. Modified bitumen is an asphalt-based membrane reinforced with polyester or fiberglass and modified with polymers, and in a 2-ply system the base sheet is still there if the cap sheet is ever damaged. It 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 |
|---|---|---|---|
| 2-ply modified bitumen | Base sheet plus cap sheet | Toughest underfoot, two layers of protection | Heavier; a white TPO roof reflects more summer heat |
| TPO | Single ply, hot-air welded seams | Reflective white surface, welded seams | One layer; thicker 60 mil sheets are needed for busy roofs |
| EPDM | Single ply rubber | Very flexible in cold weather, long track record | Seams are taped or adhered, not welded |
Our modified bitumen vs TPO guide explains when each system is the better choice.
How is the roof planned and installed on a new-build hotel?
On a new-build hotel, a 2-ply modified bitumen roof goes down in two layers over the new deck and insulation: a base sheet first, then a granulated cap sheet that protects the membrane from sun and weather.
New construction is the easiest time to get a roof right, because the roofer can work with the general contractor on curb heights, drain locations and the order of mechanical installs. That means fewer penetrations cut after the membrane is down. On a Vaughan commercial roofing job with this many rooftop units, the details are the job: every curb, vent stack, drain and parapet needs flashing that is fully bonded to the field membrane. Industry guidance from the National Roofing Contractors Association says the same thing about low-slope roofs.
What does the 20-year labour and materials warranty cover?
This Vaughan commercial roofing 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. For a hotel, a log of every service visit also makes leak tracing much faster. Ask for the warranty document for your project and keep it with the building records.
How do you maintain a hotel flat roof?
A hotel flat roof needs an inspection at least twice a year, in spring and fall, plus a check after major storms. A hotel roof sees more service traffic than most, so a set routine matters.
| 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 |
| After every HVAC service visit | Flashings around the equipment that was serviced; log who was on the roof and why |
Hotel 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 Vaughan commercial roofing client.
Photos from the installation
Photos of this Vaughan commercial roofing project, taken while the roof was being installed.
Vaughan commercial roofing from OYH Roofing
OYH Roofing handles Vaughan commercial roofing 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 modified bitumen, TPO, PVC, EPDM and built-up roofing, plus inspections and commercial roof leak repair. A 2-ply modified bitumen system also went on the City of Mississauga building at 3185 Mavis Rd, and you can see the rest of our work on the completed projects page.
Planning Vaughan commercial roofing work?
For Vaughan commercial roofing 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
How long does a 2-ply modified bitumen roof last?
A 2-ply modified bitumen roof commonly lasts 20 years or more when it is installed as a full system and inspected twice a year. The Marriott Hotel roof in Vaughan 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.
Is modified bitumen a good choice for hotel roofs?
Modified bitumen is a good choice for hotel roofs because it tolerates foot traffic from service crews, its two layers resist leaks and ponding water, and it stays flexible through freeze-thaw cycles. A white TPO roof reflects more summer heat, so the best system depends on the building and how the roof is used.
Why do most hotels have flat roofs?
Most hotels have flat or low-slope roofs because the roof doubles as a platform for HVAC units, make-up air systems and exhaust fans. A low-slope design makes that equipment easier to install, reach and service. It also means the membrane has to tolerate regular foot traffic, which shapes the choice of roofing system.
What is a 2-ply modified bitumen roof?
A 2-ply modified bitumen roof is a flat roofing system made of two layers of polymer-modified asphalt membrane: a base sheet bonded to the roof and a granulated cap sheet on top. The second layer gives a backup against leaks, which is why it is common on hotels and other busy commercial roofs.
Does OYH Roofing handle new-construction roofing in Vaughan?
OYH Roofing handles new-construction roofing in Vaughan, and the 15,000 square foot roof on the new-build Marriott Hotel 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, Marriott Hotel, Vaughan (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