--- title: "Flat Roof Repair in Sault Ste. Marie, ON | flat-roof-repair.ca" description: "Flat roof leak repair, replacement and maintenance in Sault Ste. Marie, Ontario, for houses, condos and commercial buildings. Built for heavy snow loads." url: https://flat-roof-repair.ca/locations/sault-ste-marie/ last_updated: 2026-10-23 --- # Flat roof repair in Sault Ste. Marie We repair, replace and maintain flat roofs in Sault Ste. Marie: 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 Sault Ste. Marie Much of Sault Ste. Marie's housing is older, and older houses often have flat roofs over rear additions, porches and garages. Typical signs are a stain on the kitchen ceiling, water at a skylight or a roof with several worn layers. Sault Ste. Marie has one of the five heaviest design snow loads of the 40 cities on this site, so drains and parapet flashings get extra attention. 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/). ## Steelton and the Algoma steel works in Sault Ste. Marie Sault Ste. Marie's canal was completed in 1895, and the community became a city in 1912. Steelton, with about 7,000 residents, was amalgamated in 1918, and steel-making has been the main industry before and since the Second World War. Algoma employs about 3,500 at its main plant. Census data shows about 75% of homes were built before 1981, and only about 8% from 2001 on. In older neighbourhoods such as Steelton, flat roofs over rear additions are common on workers' houses. The steel plant, tube mill and related shops are large industrial buildings with low-slope roofs. Station Mall and the east-end commercial strips carry wide flat roofs, and downtown has brick commercial blocks near the waterfront. With such an old housing stock, roof repair often means dealing with several layers of previous roofing. ## Sault Ste. Marie 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 Sault Ste. Marie has to handle. - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** ## Homes and buildings in Sault Ste. Marie The age and type of buildings shape the flat roofs we see. These are the 2021 Census figures for Sault Ste. Marie. - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** ## Sault Ste. Marie: facts for property owners - Population of Sault Ste. Marie: 72,051 (2021 Census). ([source](https://en.wikipedia.org/wiki/List_of_municipalities_in_Ontario)) - City lists 'Installing new shingles or metal roofing' among work that typically needs a permit. ([source](https://saultstemarie.ca/work/building-permits/)) > In Sault Ste. Marie, check and clear roof drains in late fall, before the first heavy snow. If you clear snow from a flat roof, leave a few centimetres on the membrane so shovels do not cut it. ## Starting prices in Sault Ste. Marie | Item | Starting price | |---|---| | [Small leak repair (patch, seam or puncture)](https://flat-roof-repair.ca/services/flat-roof-leak-repair/) | from $350 per repair | | [Small flat roof replacement (garage, porch or addition)](https://flat-roof-repair.ca/property-types/garages-and-additions/) | from $4,000 per roof | | [House flat roof replacement (about 1,000 sq ft)](https://flat-roof-repair.ca/property-types/houses/) | from $8,000 per roof | 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 Sault Ste. Marie - [Garages and additions](https://flat-roof-repair.ca/property-types/garages-and-additions/) - [Houses](https://flat-roof-repair.ca/property-types/houses/) - [Townhouses and row houses](https://flat-roof-repair.ca/property-types/townhouses-and-row-houses/) - [Condo buildings](https://flat-roof-repair.ca/property-types/condo-buildings/) - [All property types](https://flat-roof-repair.ca/property-types/) ## Nearby cities - [Sudbury](https://flat-roof-repair.ca/locations/sudbury/) - [North Bay](https://flat-roof-repair.ca/locations/north-bay/) - [Thunder Bay](https://flat-roof-repair.ca/locations/thunder-bay/) - [Northern Ontario](https://flat-roof-repair.ca/locations/northern-ontario/) ## Flat roofs in Sault Ste. Marie: questions **How much does flat roof repair cost in Sault Ste. Marie?** A small leak repair starts from $350 per repair and a new house flat roof starts from $8,000 per roof. Prices in Sault Ste. Marie depend on access, layers to remove and the membrane. See [pricing](https://flat-roof-repair.ca/pricing/). **Should I clear snow off a flat roof in Sault Ste. Marie?** Only if the snow is deep and wet, drifts are building against walls or units, or the building shows signs of stress. Use a plastic shovel, leave a layer on the membrane and never use picks or salt. If in doubt, ask a professional. **Do I need a permit to replace a flat roof in Sault Ste. Marie?** City lists 'Installing new shingles or metal roofing' among work that typically needs 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/). **My Sault Ste. Marie house is older. Can the flat roof go on over the old one?** Sometimes one new layer can go over one old layer, but on older houses we often find two or three layers already, wet insulation or soft deck boards. Then a full tear-off is the safer choice. See [repair or replace](https://flat-roof-repair.ca/guides/repair-or-replace-flat-roof/). **Do you also work near Sault Ste. Marie?** Yes, including Sudbury, North Bay, Thunder Bay and the rest of northern Ontario. See [Northern Ontario](https://flat-roof-repair.ca/locations/northern-ontario/). ## Related - [Flat roof repair in Northern Ontario](https://flat-roof-repair.ca/locations/northern-ontario/) - [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/) - [Flat roof in winter](https://flat-roof-repair.ca/guides/flat-roof-in-winter/) --- Get a quote: https://flat-roof-repair.ca/request-a-quote/ ยท Email: info@flat-roof-repair.ca