--- title: "Flat Roof Repair in Mississauga, ON | flat-roof-repair.ca" description: "Flat roof leak repair, replacement and maintenance in Mississauga, Ontario, for houses, condos and commercial buildings. Drains and flashings for heavy summer storms." url: https://flat-roof-repair.ca/locations/mississauga/ last_updated: 2026-10-23 --- # Flat roof repair in Mississauga We repair, replace and maintain flat roofs in Mississauga: houses, garages and additions, condo and apartment buildings, plazas, offices and warehouses. Send photos and a few details for a written quote. ## Flat roof services in Mississauga Mississauga has many mid- and high-rise buildings, whose flat roofs are managed by condo boards and property managers. The usual work is drains, flashings at mechanical units and planned replacements. We find where the water gets in, fix that spot and tell you how much life the rest of the roof has. When a roof is past repair, we [replace it](https://flat-roof-repair.ca/services/flat-roof-replacement/) with EPDM, TPO, PVC or modified bitumen, and fix the [drainage](https://flat-roof-repair.ca/services/roof-drains-and-scuppers/) so water does not sit on the new membrane. Owners and property managers also book [inspections](https://flat-roof-repair.ca/services/flat-roof-inspection/) and [maintenance visits](https://flat-roof-repair.ca/services/flat-roof-maintenance/). ## Postwar subdivisions and the Argentia Road industrial belt in Mississauga Mississauga was mostly farmland and lakeshore villages until after the Second World War. The Queen Elizabeth Way opened in 1935, Malton Airport followed in 1937, and Applewood Acres became the first major planned development near the QEW and Dixie Road. The new towns of Erin Mills and Meadowvale were started in 1968 and 1969, and Square One opened in 1974. Census data show about 38% of homes were built before 1981 and 23% since 2001. That mix explains the roofs. Older pockets such as Port Credit, Streetsville, Cooksville and Applewood have houses and low-rise plazas from the 1950s to 1970s, where you often find flat roofs over additions, garages and small commercial strips. Erin Mills, Meadowvale and Lisgar hold later subdivisions and townhouse blocks, which commonly carry membrane roofs over balconies and podium sections. Around Malton, the airport and the Meadowvale Argentia Road industrial park, large warehouses and head-office buildings have wide low-slope roofs, and Mississauga City Centre adds condominium towers with terraces and podium decks. ## Mississauga weather and your flat roof Ontario's Building Code sets the climate values used to design roofs in each municipality. They show what a flat roof in Mississauga has to handle. Figures are for Mississauga; SB-1 also lists Pearson Airport and Port Credit. - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** ## Homes and buildings in Mississauga The age and type of buildings shape the flat roofs we see. These are the 2021 Census figures for Mississauga. - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** ## Storms that hit Mississauga - 8 July 2013: Two thunderstorm systems merged over southern Ontario on 8 July 2013 and caused widespread flooding and power outages in Mississauga and the rest of the Greater Toronto Area. ([source](https://en.wikipedia.org/wiki/History_of_flooding_in_Canada)) - December 2013: The December 2013 ice storm caused major damage in Mississauga. ([source](https://en.wikipedia.org/wiki/December_2013_North_American_ice_storm)) ## Mississauga: facts for property owners - Population of Mississauga: 717,961 (2021 Census). ([source](https://en.wikipedia.org/wiki/List_of_municipalities_in_Ontario)) - Mississauga is part of the Regional Municipality of Peel. - City of Mississauga: re-shingling a roof needs no permit; 'roof extensions or alterations to increase the height or change the slope' and rooftop HVAC replacements do need a permit. ([source](https://www.mississauga.ca/services-and-programs/building-and-renovating/building-permits/when-a-building-permit-is-required/)) - Stormwater charge: Charge on Region of Peel water bill based on property type and amount of hard surfaces. 2026-27 fee schedule effective April 1, 2026. ([source](https://www.mississauga.ca/services-and-programs/home-and-yard/stormwater/stormwater-charge/)) - Basement flooding prevention rebate: Rebate of up to $7,500 for installing basement flooding prevention measures (detached, semi, duplex, townhouse owners). ([source](https://www.mississauga.ca/services-and-programs/home-and-yard/stormwater/apply-for-a-basement-flooding-prevention-rebate/)) > Before summer storm season, look at the drains and scuppers on your roof from a safe spot or in photos. Leaves and grit in a drain basket are the most common cause of water backing up under flashings. ## Starting prices in Mississauga | Item | Starting price | |---|---| | [Commercial roof inspection and report](https://flat-roof-repair.ca/services/flat-roof-inspection/) | from $450 per roof | | [Roof drain or scupper repair](https://flat-roof-repair.ca/services/roof-drains-and-scuppers/) | from $800 per drain | | [Commercial roof replacement](https://flat-roof-repair.ca/property-types/condo-buildings/) | 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](https://flat-roof-repair.ca/pricing/). ## Roofs we work on in Mississauga - [Condo buildings](https://flat-roof-repair.ca/property-types/condo-buildings/) - [Townhouses and row houses](https://flat-roof-repair.ca/property-types/townhouses-and-row-houses/) - [Houses](https://flat-roof-repair.ca/property-types/houses/) - [Garages and additions](https://flat-roof-repair.ca/property-types/garages-and-additions/) - [All property types](https://flat-roof-repair.ca/property-types/) ## Nearby cities - [Toronto](https://flat-roof-repair.ca/locations/toronto/) - [Brampton](https://flat-roof-repair.ca/locations/brampton/) - [Oakville](https://flat-roof-repair.ca/locations/oakville/) - [Greater Toronto Area](https://flat-roof-repair.ca/locations/greater-toronto-area/) ## Flat roofs in Mississauga: questions **How much does flat roof repair cost in Mississauga?** A small leak repair starts from $350 per repair and a new house flat roof starts from $8,000 per roof. Prices in Mississauga depend on access, layers to remove and the membrane. See [pricing](https://flat-roof-repair.ca/pricing/). **What causes most flat roof leaks in Mississauga?** Details more than the open membrane: seams, parapet and wall flashings, drains, vents and skylights. See [flashing leaks](https://flat-roof-repair.ca/problems/flashing-leaks/) and [clogged drains](https://flat-roof-repair.ca/problems/clogged-drains/). **Do I need a permit to replace a flat roof in Mississauga?** City of Mississauga: re-shingling a roof needs no permit; 'roof extensions or alterations to increase the height or change the slope' and rooftop HVAC replacements do need a permit. That wording is about shingles, so ask how it applies to a flat roof membrane. Rules can change, so confirm with the building department before you start. See [re-roofing permits in Ontario](https://flat-roof-repair.ca/guides/re-roofing-permits-ontario/). **Do you work with condo boards in Mississauga?** Yes. We send a written scope, photos and a quote the board can compare, and can split work into phases. See [planning a condo roof project](https://flat-roof-repair.ca/guides/condo-roof-planning/). **Do you also work near Mississauga?** Yes, including Toronto, Brampton, Oakville and the rest of the GTA. See [Greater Toronto Area](https://flat-roof-repair.ca/locations/greater-toronto-area/). ## Related - [Flat roof repair in Greater Toronto Area](https://flat-roof-repair.ca/locations/greater-toronto-area/) - [Flat roof leak repair](https://flat-roof-repair.ca/services/flat-roof-leak-repair/) - [Flat roof replacement](https://flat-roof-repair.ca/services/flat-roof-replacement/) - [Finding a flat roof leak](https://flat-roof-repair.ca/guides/finding-a-flat-roof-leak/) --- Get a quote: https://flat-roof-repair.ca/request-a-quote/ ยท Email: info@flat-roof-repair.ca