Flat roofs in Ottawa face drainage challenges that pitched roofs never deal with. Guns N' Hoses installs and repairs flat roofing systems built specifically for Canada's freeze-thaw season — not systems designed for warmer climates and adapted poorly to Ottawa winters.
TPO, EPDM & modified bitumen. Free written estimates. All of Ottawa.
A flat roof that works in Phoenix will fail in Ottawa. The combination of heavy snow load, standing water from spring melt, and hundreds of freeze-thaw cycles every winter demands a system designed for those conditions from the ground up. Guns N' Hoses installs flat roofing systems built for Canadian conditions — and repairs flat roofs that other contractors installed wrong.
The most common commercial flat roof membrane in Ottawa. TPO is heat-welded at the seams, making it highly resistant to water infiltration. White TPO reflects heat in summer and handles Ottawa's temperature extremes well.
A single-ply rubber membrane that remains flexible in extreme cold — critical for Ottawa winters. EPDM handles freeze-thaw movement without cracking and is one of the most durable flat roof options available for residential applications.
A reinforced asphalt membrane system applied in layers. Modified bitumen handles foot traffic well and is highly resistant to puncture — making it a strong choice for rooftop decks and low-slope sections on Ottawa homes.
A flat roof in Ottawa must handle significant snow accumulation. Proper drainage design is not optional — ponding water that freezes and refreezes destroys membrane seams faster than anything else. Drain placement and slope design are the first things we get right.
Ottawa experiences hundreds of freeze-thaw cycles every winter. Membranes that are not properly adhered or flashed will lift, split, and separate at seams. We use systems and installation methods rated for Canadian climate conditions.
The joint between a flat roof membrane and a parapet wall is the most common failure point on Ottawa flat roofs. This flashing must be installed correctly and inspected regularly — it is where most flat roof leaks begin.
Ottawa's leaf and debris load blocks flat roof drains every fall. A blocked drain in November means a pond of ice by January. We advise all flat roof clients on a simple annual maintenance check.
Most flat roof failures are localized — a seam separation, a puncture, a failed drain collar, or a parapet flashing that has lifted. These can almost always be repaired without replacing the entire membrane if caught early enough.
Guns N' Hoses diagnoses flat roof problems at the source. We inspect the full membrane, all seams, all penetrations, and all flashing details before recommending repair or replacement. If repair is the right answer, we repair it. If the membrane has reached the end of its useful life, we tell you that — and give you a replacement quote.
What We Repair
Membrane splits and punctures
Seam separations and lifting edges
Parapet wall flashing failures
Drain collar leaks and blockages
Blister and bubble repairs
Low-slope section repairs on pitched roofs
| System | Typical Lifespan | Best For |
|---|---|---|
| TPO Membrane | 15–25 years | Commercial, residential flat sections |
| EPDM Rubber | 20–30 years | Residential, extreme cold performance |
| Modified Bitumen | 15–20 years | Rooftop decks, high foot traffic areas |
Lifespan depends heavily on installation quality and Ottawa's climate demands. A flat roof installed without proper drainage design or parapet flashing will fail years before its rated lifespan regardless of membrane quality.
We inspect the existing membrane, drainage, flashing details, and roof deck condition. We identify what failed, why, and whether repair or replacement is the right call.
You receive a detailed written quote specifying the system, materials, and installation method before any work begins. The price we quote is the price you pay.
Old membrane removed. Roof deck inspected and repaired if needed. New system installed to manufacturer specifications and Ontario Building Code standards, with particular attention to drain placement, parapet flashing, and all penetrations.
Full inspection before we leave the site. Every flat roof installation comes with our workmanship guarantee. We follow up after the first significant rainfall to confirm drainage is performing correctly.
“Vanessa and her team did my parents' roof a few months back. She was very quick to respond and communication was great. She had a lot of patience explaining things to my parents as they don't speak English very well.”
— Jenn, South Keys, Ottawa
“I would highly recommend. We had a leak in our roof and Vanessa and her team were able to fix the issue in a timely manner. We will be using her services again.”
— Sunny, Gloucester
Written quote before any work starts. We cover all of Ottawa — Kanata, Nepean, Barrhaven, and everywhere in between.
Call Vanessa Directly
613-801-8582Send Us an Email
info@gunsnhosesroofing.caService Area
Ottawa · Nepean · Kanata · Stittsville · Gloucester · Orleans
Mon – Fri
7:00 AM – 6:00 PM
Sat – Sun
By Appointment
Written quote before any work starts. We'll be in touch within 24 hours.
Every day you delay could mean more damage, more cost, more risk. Let Ottawa's most trusted roofing team give you peace of mind — starting with a free inspection.