Flat Roofing Calgary
Flat roofs for Calgary homes.
Flat roofing Calgary homeowners need is a different job from shingles. A flat roof over a garage, an addition or a modern infill drains slowly, and it meets walls and slopes at joints that leak. We install and replace flat roofs on houses, mostly in torch-on, with a 10-year workmanship warranty.
What Calgary homeowners say about us
Our reviews do the explaining. These are word for word from public Google reviews.
That is 4.8 stars across 186 Google reviews. Read all of them on Google before you call anyone, including us.
Where a house has a flat roof
Most of the flat roofs we see on houses sit in one of these places.
- A detached garage or a carport.
- An addition or sunroom built off the back of the house.
- The roofs of a modern infill, often behind a short parapet wall.
- A porch, entry or bay window roof.
- The low section where a two-storey roof steps down to one storey.
Plenty of houses have both kinds of roof. One customer with flat and shingled roofs wrote that they “are completed fast and the price makes sense for the job!”
Own an apartment block, a condo building or a commercial property? See commercial roofing in Calgary. It covers the scope, schedule and paperwork that owners and boards need.
Why flat roofs on houses leak
A flat roof is not truly flat. It needs a slight slope to move water to a drain or scupper. Most leaks start where that water slows down, or where the flat roof meets something else.
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Where flat meets a wall or a slope
This joint takes water from two directions, so the flashing there has to be right.
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Ponding water
Water that sits for days after rain or snowmelt works on the seams until it finds a weak lap.
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Chinook freeze-thaw
Snow melts in a warm spell and refreezes overnight, often at the drains and edges where water collects.
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Hail
A flat roof faces straight up and takes every hit. Look for bruised or punctured spots after a storm.
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A wet deck underneath
A slow leak soaks the wood under the membrane. You feel it as soft spots, and it gets replaced when the old roof comes off.
Signs your flat roof needs replacing
Mark Dawson, our owner, looks for these when he decides between a repair and a new roof.
- Blisters, ridges or cracks in the membrane.
- Granules worn off the surface.
- Edges curling or cupping.
- Water pooling on the roof for days.
- Damage from hail or an impact.
- Open or unsealed laps where the membrane overlaps.
- Dried out or cracked sealant.
A few of these in one area usually means a repair. Most of them across the roof usually means a new one. A ceiling stain under the flat section that keeps coming back is worth a look either way.
If the roof is leaking right now, start with roof repair in Calgary.
Repair it, replace it, or do it with the rest of the roof
On a house, the flat roof is rarely the only roof. That changes the choice.
Repair the flat section
For a leak in one area on a membrane that is otherwise sound. Most flat roof leak repairs run $350 to $2,500.
Replace the flat section
The old layers come off, any rotted deck is replaced and a new membrane goes on. Flat roofs carry a 10-year workmanship warranty.
Flat and shingles together
If the shingled roof is aging too, one crew and one schedule can do both. See shingle roof replacement for that side of the job.
A typical flat roof leak repair runs
$350 to $2,500
Where a repair lands in that range depends on:
- How big the damaged area is.
- Whether the deck under it is wet.
- Whether the flashing at a wall or slope has to be redone.
- Access to the roof.
A full flat roof replacement is quoted after we see it, itemized line by line, so you can compare it with other bids on the same work.
What goes on your roof
Ask us which flat roof system we would pick and the answer is torch-on. Mark calls it “the best flat roof system,” and it is what we install on most flat roofs, houses included. We also install TPO and EPDM where they suit a roof better. Our flat roof membranes are IKO.
For the detail, see how torch-on, TPO and EPDM compare.
How a flat roof replacement on a house works
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Send photos or call
Call 403-608-9933 or send the form. Photos of the roof and any ceiling stains help. One customer wrote that Jacky “took the time to look at the photos I sent him.”
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Site visit
We look at the flat section, the drains and every joint where it meets a wall or another roof.
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Itemized quote
You get the scope and price line by line, so you can compare it with other bids.
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Start date
Materials are ordered and you get a date. Weather can move it, and we tell you as soon as we know.
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Tear-off and install
The old roof comes off, rotted deck is replaced where we find it, and the new membrane goes on.
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Cleanup and warranty
The site is cleaned up. Flat roofs carry a 10-year workmanship warranty. Ask for the terms in writing with your quote.
Why homeowners call us for flat roofs
Mark Dawson started the company in 2011. The crews handle 200 to 300 projects a year, from a garage roof to large commercial flat roofs.
One homeowner called about bad leaks on a flat roof. They wrote that the team explained “where the problem areas are (texted me pictures as well)” and then, after the next stretch of weather: “We had lots of rain since then, no leaks!”
Read the reviews on Google and see recent work on the roofing projects page.
Service area
Our office is at 3935 3A St NE, Unit 3, Calgary, AB T2E 6S7. We install and replace flat roofs across Calgary, and in Airdrie, Cochrane, Chestermere and Okotoks. Office hours are Monday to Saturday, 8am to 7pm.
- Calgary
- Airdrie
- Cochrane
- Chestermere
- Okotoks
Flat roof questions
How long does a flat roof last in Calgary?
It depends on the membrane, how well water drains off it, and how the joints at walls and slopes were done. We will not quote a lifespan we cannot stand behind. What we put in writing is a 10-year workmanship warranty on flat roofs. If yours is already leaking, see flat roof repair in Calgary.
How much does a flat roof cost on a house?
A typical flat roof leak repair runs $350 to $2,500. A full replacement is priced on the size of the roof, the condition of the deck and the detail at walls and drains, so we quote it after we see it, itemized line by line.
Is torch-on the best flat roof for a house?
For most flat roofs we work on, yes. It is what Mark recommends and what we install most. TPO or EPDM can suit some roofs better, and we will tell you if yours is one of them. See how torch-on, TPO and EPDM compare in Calgary.
Can you do the flat roof and the shingled roof at the same time?
Yes. One crew and one schedule can cover both. One customer wrote that the crew “worked a very long day to get the house and garage roofs installed.” See everything our Calgary roofers take on.
My flat roof is leaking right now. What should I do?
Call 403-608-9933. If you can, take photos of the ceiling and the roof. See roof leak repair for how a repair works.
Do you do flat roofs on apartment and condo buildings?
Yes. See commercial flat roofing for buildings, condo boards and property managers.
Need flat roofing in Calgary?
Tell us what kind of flat roof you have and what you have noticed, and send photos if you can. We will book a visit and send a written, itemized quote. For flat roofing Calgary homeowners can plan around, call 403-608-9933 or send the form. We serve Calgary, Airdrie, Cochrane, Chestermere and Okotoks.