Free consultation and quote
A free quote after we look at the roof, the slope and the drains, with no hidden fees.
Ottawa Flat Roof Repair, Replacement and Installation
Modified Bitumen, TPO & EPDM Flat Roofs | Homes, Garages & Commercial Buildings | BBB A+ Rated | 20-Year Workmanship Warranty
Flat Roofing for Ottawa Homes and Buildings
Flat roofing in Ottawa has a harder job than most. Snow sits on it all winter, meltwater has to find its way to the drain and freeze-thaw works at every seam. Vanity Roofing installs, repairs and replaces flat and low-slope roofs on homes, garages, additions, townhouses and commercial buildings across Ottawa and the Ottawa Valley.
Most of the flat roofs we install are modified bitumen, the system that holds up best to Ottawa’s climate, and we also work with TPO and EPDM membranes. As experienced Ottawa roofing contractors, we build every flat roof around proper slope to the drains, solid flashing at walls and parapets and a membrane that will last.
Flat Roof Services We Provide
Whether you need a new flat roof installation, a targeted flat roof repair or a full replacement of an old tar and gravel roof, our crews handle it from start to finish.
Signs Your Flat Roof Needs Repair
- Water ponding on the roof for more than a couple of days after rain
- Blisters, bubbles or soft spots in the membrane
- Cracks, splits or seams pulling apart
- Leaks or ceiling stains under the roof, often near drains or walls
- Flashing pulling away from walls, parapets or skylights
- Bare spots or exposed felt on an older tar and gravel roof
Caught early, most of these are a straightforward flat roof repair. Left through another winter, water gets into the insulation and roof deck and the job gets a lot bigger.
Flat Roof Installation
New modified bitumen, TPO and EPDM flat roofs for homes, garages, additions and commercial buildings, built with proper slope to the drains.
Flat Roof Repairs
We trace and repair leaks, blisters, split seams, failed flashing and storm damage on all types of flat roofs, including older tar and gravel.
Flat Roof Inspections
A flat roof inspection checks the membrane, seams, drains and flashing, and catches ponding water and trapped moisture before they turn into leaks.
Flat Roofing Systems We Install
The right flat roofing system depends on the building, how the roof is used and your budget.
Vanity Roofing installs and services the flat roofing materials that hold up to Ottawa’s weather.
TPO and EPDM Single-Ply Membranes
Single-ply membranes such as TPO and EPDM cover a flat roof in large sheets with fewer seams. TPO is a white membrane with heat-welded seams that reflects summer heat, and EPDM is a black rubber membrane that stays flexible in deep cold.
Both are lightweight and UV resistant, which makes them a good fit for large commercial roofs and residential flat roof sections.
Installed correctly, single-ply roofing gives you strong waterproofing and can help lower cooling costs in the summer.
Comparing options? Our overview of flat roofing systems breaks down the main options, and our article on flat roofs vs sloped roofs covers the trade-offs. Flat roofs also need extra care in the cold, so here is how to winterize your flat roof and why drainage matters on flat roofs.
Modified Bitumen Roofing
Modified bitumen is the flat roofing system we install most in Ottawa. It is a multi-layer asphalt membrane reinforced with polyester or fibreglass, applied in overlapping layers, and it handles heavy snow loads and repeated freeze-thaw cycles well.
The layered build creates a tough waterproof barrier that stands up to foot traffic and is easy to repair years down the road, which is why it suits both residential and commercial flat roofs.
Replacing Old Tar and Gravel Roofs
Many older Ottawa homes and buildings still have built-up tar and gravel roofs. When they start leaking or losing gravel, we tear them off and replace them with a modern modified bitumen system, and fix the slope and drains while we are up there.
Why Choose a Flat Roof
A properly built flat roof has real advantages for Ottawa homes, additions and commercial properties.
Modern flat roofing membranes give dependable protection through heavy snow, freeze-thaw cycles and summer storms, and they make good use of the space on top of the building.
Lower Material and Labour CostsÂ
A flat roof usually needs less material and less labour than a complex pitched roof, so it can give you strong long-term value while still keeping the building dry.
Flexible Design and Rooftop Use
A flat roof gives you usable space. Depending on the building, it can hold HVAC units, solar panels or maintenance walkways that would be hard to fit on a pitched roof.
Durable and Easy to MaintainÂ
Modified bitumen and single-ply membranes are built to handle Ottawa’s climate, and they are easy to walk on for inspections.
With a little care before winter and clear drains, a flat roof gives you a long service life, and small repairs are quick to do when they come up.
How a Flat Roofing Project Works
Material selection
We recommend modified bitumen, TPO or EPDM based on your roof, how it is used and your budget.
Project planning
We plan the tear-off and install so the roof is never left open overnight and your day is disrupted as little as possible.
Installation or repair
We install, repair or replace the flat roof, with new flashing at every wall, parapet and penetration.
Clean-up and final inspection
A full clean-up with a magnet sweep for nails, then a final inspection of the membrane and drains.
Follow-up and warranty
We follow up to make sure you are happy, and our 20-year workmanship warranty covers the roofs we install.
Why Ottawa Property Owners Choose Vanity Roofing for Flat Roofs
Since 2015 we have completed more than 18,000 roofing and exterior projects across Ottawa, from garage flat roofs to full commercial roof replacements.
20-Year Workmanship Warranty
Every flat roof we install comes with our own 20-year workmanship warranty, plus the manufacturer's warranty on the membrane.
Certified & Trusted Experts
CertainTeed SELECT ShingleMaster (top 1% nationwide), James Hardie Elite Contractor, Owens Corning Preferred Contractor and BBB A+ rated.
Customer Satisfaction
Clear quotes, photo updates and a tidy site with a daily magnet sweep for nails.
Get a Flat Roof Quote in Ottawa
From garages and home additions to large commercial buildings, Vanity Roofing builds flat roofs that drain properly and last. Every project starts with a look at the roof structure, slope and drains so we can recommend the right system for your property.
Need a flat roof repair, replacement or new install? Contact our team or call 613-851-4448 for a free estimate. For larger buildings, see our commercial roofing services.
A Flat Roofing Contractor Ottawa Trusts
Vanity Roofing has built its reputation on proven results, long-term warranties, and referrals from satisfied customers across Ottawa. As the largest installer of CertainTeed® roofing products in Ottawa and a Select ShingleMaster™ in the top 1% nationwide, we’re able to register CertainTeed’s 5-Star Warranty, covering materials and labour for up to 50 years and workmanship for up to 25 years on qualifying shingle systems. That level of protection reflects the quality of our installations and the confidence we stand behind.
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Our commitment to excellence is further reinforced by an A+ rating with the Better Business Bureau and recognition as Best Roofing Contractor in Ottawa by ThreeBestRated every year since 2019. We’re also certified by the Vinyl Siding Institute and recognized as a James Hardie Elite Contractor, ensuring the same high standards across all exterior services. From roofing to siding, we communicate clearly at every stage of your project and deliver workmanship built to last, so you can feel confident your home or business is protected by one of Ottawa’s most trusted exterior contractors.
