---
title: "Flat Roof Repair in Greater Toronto Area | flat-roof-repair.ca"
description: "Flat roof leak repair, replacement and maintenance across the GTA: Toronto, Mississauga, Brampton and nearby. Homes and commercial roofs."
url: https://flat-roof-repair.ca/locations/greater-toronto-area/
last_updated: 2026-10-23
---

# Flat roof repair in Greater Toronto Area

Leak repair, repairs, replacement and maintenance of flat roofs in 15 cities across the GTA, for homes and businesses.

## Flat roofs in the GTA

The GTA has more flat roofs than anywhere else in Ontario: rear additions and garages on older Toronto houses, low-rise condos and rental buildings, post-war plazas and the business parks and warehouses of Peel, York, Halton and Durham.

Snow loads here are lower than in most of the province, but summer storms drop a lot of rain fast. Drains, scuppers and the flashings around them cause many of the leaks we see.

## Cities in Greater Toronto Area

- [Toronto](https://flat-roof-repair.ca/locations/toronto/)
- [Mississauga](https://flat-roof-repair.ca/locations/mississauga/)
- [Brampton](https://flat-roof-repair.ca/locations/brampton/)
- [Vaughan](https://flat-roof-repair.ca/locations/vaughan/)
- [Markham](https://flat-roof-repair.ca/locations/markham/)
- [Richmond Hill](https://flat-roof-repair.ca/locations/richmond-hill/)
- [Oakville](https://flat-roof-repair.ca/locations/oakville/)
- [Burlington](https://flat-roof-repair.ca/locations/burlington/)
- [Milton](https://flat-roof-repair.ca/locations/milton/)
- [Pickering](https://flat-roof-repair.ca/locations/pickering/)
- [Ajax](https://flat-roof-repair.ca/locations/ajax/)
- [Whitby](https://flat-roof-repair.ca/locations/whitby/)
- [Oshawa](https://flat-roof-repair.ca/locations/oshawa/)
- [Newmarket](https://flat-roof-repair.ca/locations/newmarket/)
- [Aurora](https://flat-roof-repair.ca/locations/aurora/)

## Roof design climate by city

| Item | Starting price |
|---|---|
| [[Toronto](/locations/toronto/)](https://flat-roof-repair.ca25 mm) | 0.9 kPa |
| [[Mississauga](/locations/mississauga/)](https://flat-roof-repair.ca25 mm) | 1.1 kPa |
| [[Brampton](/locations/brampton/)](https://flat-roof-repair.ca28 mm) | 1.3 kPa |
| [[Vaughan](/locations/vaughan/)](https://flat-roof-repair.ca26 mm) | 1.1 kPa |
| [[Markham](/locations/markham/)](https://flat-roof-repair.ca25 mm) | 1.3 kPa |
| [[Richmond Hill](/locations/richmond-hill/)](https://flat-roof-repair.ca25 mm) | 1.5 kPa |
| [[Oakville](/locations/oakville/)](https://flat-roof-repair.ca23 mm) | 1.1 kPa |
| [[Burlington](/locations/burlington/)](https://flat-roof-repair.ca23 mm) | 1.1 kPa |
| [[Milton](/locations/milton/)](https://flat-roof-repair.ca25 mm) | 1.3 kPa |
| [[Pickering](/locations/pickering/)](https://flat-roof-repair.ca23 mm) | 1 kPa |
| [[Ajax](/locations/ajax/)](https://flat-roof-repair.ca23 mm) | 1 kPa |
| [[Whitby](/locations/whitby/)](https://flat-roof-repair.ca23 mm) | 1.2 kPa |
| [[Oshawa](/locations/oshawa/)](https://flat-roof-repair.ca23 mm) | 1.4 kPa |
| [[Newmarket](/locations/newmarket/)](https://flat-roof-repair.ca28 mm) | 2 kPa |
| [[Aurora](/locations/aurora/)](https://flat-roof-repair.ca28 mm) | 2 kPa |

Source: Ontario Building Code, Supplementary Standard SB-1, Table 1.2. Values are design figures, not forecasts.

## What this means for your roof

Snow loads are moderate here. Most damage comes from freeze–thaw cycles, ice at the drains in late winter and heavy summer rain.

Whatever the climate, most leaks start at details: seams, flashings, drains, vents and skylights. See [roof problems](https://flat-roof-repair.ca/problems/) for causes and fixes.

## Starting prices

| Item | Starting price |
|---|---|
| [Small leak repair (patch, seam or puncture)](https://flat-roof-repair.ca/services/flat-roof-leak-repair/) | from $350 per repair |
| [Roof inspection with written photo report (house)](https://flat-roof-repair.ca/services/flat-roof-inspection/) | from $250 per roof |
| [House flat roof replacement (about 1,000 sq ft)](https://flat-roof-repair.ca/services/flat-roof-replacement/) | from $8,000 per roof |
| [Commercial roof replacement](https://flat-roof-repair.ca/property-types/warehouses-and-industrial/) | 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.

## Flat roof work in Greater Toronto Area

**Do you work outside the cities listed for the GTA?**

Often, yes. Tell us the town in the quote form. Smaller towns are quoted with travel time included.

**Which roofs do you work on in the GTA?**

Houses, townhouses, garages and additions, condo and apartment buildings, plazas, offices and warehouses. See [property types](https://flat-roof-repair.ca/property-types/).

**Which flat roof material suits this climate?**

EPDM, TPO, PVC and modified bitumen all perform in Ontario when installed and detailed well. See [choosing a flat roof material](https://flat-roof-repair.ca/guides/choosing-a-flat-roof-material/).

## Related

- [Where we work in Ontario](https://flat-roof-repair.ca/locations/)
- [Flat roof services](https://flat-roof-repair.ca/services/)
- [Flat roof in winter](https://flat-roof-repair.ca/guides/flat-roof-in-winter/)
- [Flat roof prices](https://flat-roof-repair.ca/pricing/)

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Get a quote: https://flat-roof-repair.ca/request-a-quote/ · Email: info@flat-roof-repair.ca