Homes, condos and commercial buildings
Flat roof repair and replacement in Ontario
We find and fix flat roof leaks, repair worn membranes and replace roofs that are past saving. Send a few details and photos, and we reply by email with next steps and a written quote.
- All of Ontario
- Homes and businesses
- All flat roof membranes
- Written quote by email
What we do
Leak repair
Trace where the water gets in and fix that spot, not just the stain.
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Repairs
Seams, blisters, cracks, flashings and worn areas on an otherwise sound roof.
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Replacement
Tear-off, deck check, insulation and a new membrane when repairs stop making sense.
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Inspection and maintenance
A photo report on the roof and seasonal visits that catch problems early.
View detailsRoofs we work on
Houses and townhouses
Rear additions, dormers and full flat roofs on detached, semi and row houses.
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Garages and additions
Small roofs that leak into garages, porches and sunrooms.
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Condo and apartment buildings
Repairs and replacements planned with boards and property managers.
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Plazas, offices and warehouses
Large low-slope roofs with drains, rooftop units and tenants below.
View detailsHow it works
Send the details
Your city, the type of building and what is happening. Photos of the roof and any stains help most.
Roof visit
We look at the membrane, seams, flashings, drains and the inside, then explain what we found.
Written quote
The quote lists the work, materials and price, and says whether repair or replacement makes more sense.
Repair or new roof
We do the work, clean up and send photos of the finished roof.
Starting prices
| Item | Starting price |
|---|---|
| Small leak repair (patch, seam or puncture) | from $350 per repair |
| Roof inspection with written photo report (house) | from $250 per roof |
| Small flat roof replacement (garage, porch or addition) | from $4,000 per roof |
| House flat roof replacement (about 1,000 sq ft) | from $8,000 per roof |
| Commercial roof replacement | from $8 per sq ft |
Starting prices in CAD before 13% HST, based on typical Ontario contractor rates (mostly Toronto and the GTA). The final price depends on roof size, access, the layers to remove, the membrane, drains and flashings, and is confirmed in your written quote.
See all prices and what a flat roof costs in Ontario.
Built for Ontario weather
Flat roofs in Ontario take freeze–thaw cycles, heavy snow, ice at the drains, fast spring melt and summer downpours. Most leaks start where the membrane meets something else: a seam, a parapet, a drain, a vent or a skylight.
That is why every visit checks those details first, and why a good repair fixes the cause, such as a blocked drain or a low spot that holds water.
Flat roof materials
EPDM (rubber)
Black rubber sheet, commonly lasting 20 to 30 years.
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TPO and PVC
White heat-welded membranes that reflect summer heat.
View detailsModified bitumen
Torch-on or self-adhered SBS, common on Ontario houses.
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Built-up (tar and gravel)
Layers of felt and asphalt under gravel on older buildings.
View detailsWhere we work
Across Ontario, from Windsor to Ottawa and north to Thunder Bay.
Common questions
How much does flat roof repair cost?
A single leak repair starts from $350 per repair. A new flat roof on a house starts from $8,000 per roof for about 1,000 sq ft. See pricing.
Should I repair or replace my flat roof?
Repair if the problem is local and the rest of the membrane is sound. Replace when leaks keep coming back in different places or the insulation underneath is wet. See repair or replace.
Do you handle urgent leaks?
Urgent leaks: mark the request as urgent and we answer those first. We do not promise a fixed arrival time.
Do you work on commercial roofs?
Yes: plazas, offices, warehouses, condo and apartment buildings. See property types.
Leak, damage or an old flat roof?
Send a few details and photos. We reply by email with next steps and a written quote.