--- title: "Flat Roof Repair in Peterborough, ON | flat-roof-repair.ca" description: "Flat roof leak repair, replacement and maintenance in Peterborough, Ontario, for houses, condos and commercial buildings. Drains and flashings for heavy summer storms." url: https://flat-roof-repair.ca/locations/peterborough/ last_updated: 2026-10-23 --- # Flat roof repair in Peterborough We repair, replace and maintain flat roofs in Peterborough: 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 Peterborough Much of Peterborough'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. 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/). ## Hydro power, canoes and a historic downtown in Peterborough Peterborough became a city in 1905, a year after the Lift Lock opened. Cheap hydro-electric power drew General Electric, which operated from 1892 to 2018, and Quaker Oats, which is still downtown. Neighbourhoods include East City, the South End, which was built on an old lake bed and is prone to flooding, and the north end around Trent University. Census data shows about 64% of homes were built before 1981, and about 36% before 1961. Large factory buildings, like the former General Electric complex on Park Street North, were built with big flat or low-slope roofs. Houses in older neighbourhoods often have flat roofs over rear additions and porches, and the downtown has brick commercial blocks with parapets. The malls, including Lansdowne Place and Peterborough Square, which opened in the 1970s, carry wide low-slope roofs. In flood-prone areas, keeping roof drainage in working order matters. ## Peterborough 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 Peterborough has to handle. - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** ## Homes and buildings in Peterborough The age and type of buildings shape the flat roofs we see. These are the 2021 Census figures for Peterborough. - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** - **undefined** ## Storms that hit Peterborough - 21 May 2022: The derecho brought down hydro poles and lines in Peterborough and the city declared a state of emergency on May 25. ([source](https://en.wikipedia.org/wiki/May_2022_Canadian_derecho)) - March 2025: A multi-day ice storm coated Peterborough with over 20 mm of ice, bringing down trees and power lines and leaving some residents without power for a week or more. ([source](https://en.wikipedia.org/wiki/Peterborough,_Ontario)) ## Peterborough: facts for property owners - Population of Peterborough: 83,651 (2021 Census). ([source](https://en.wikipedia.org/wiki/List_of_municipalities_in_Ontario)) - City: re-shingling a roof needs no permit if there is no structural modification. ([source](https://www.peterborough.ca/business-building-development/planning-building-and-development/building-services-and-permits/)) - Stormwater Management Fee: Interim fee based on assessed property value; City is conducting a Stormwater Rate Study to move to a runoff-based fee. ([source](https://www.peterborough.ca/living-in-peterborough/stormwater-and-sewer-services/stormwater/)) > 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 Peterborough | 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 Peterborough - [Garages and additions](https://flat-roof-repair.ca/property-types/garages-and-additions/) - [Apartment buildings](https://flat-roof-repair.ca/property-types/apartment-buildings/) - [Houses](https://flat-roof-repair.ca/property-types/houses/) - [Townhouses and row houses](https://flat-roof-repair.ca/property-types/townhouses-and-row-houses/) - [All property types](https://flat-roof-repair.ca/property-types/) ## Nearby cities - [Oshawa](https://flat-roof-repair.ca/locations/oshawa/) - [Orillia](https://flat-roof-repair.ca/locations/orillia/) - [Belleville](https://flat-roof-repair.ca/locations/belleville/) - [Central Ontario](https://flat-roof-repair.ca/locations/central-ontario/) ## Flat roofs in Peterborough: questions **How much does flat roof repair cost in Peterborough?** A small leak repair starts from $350 per repair and a new house flat roof starts from $8,000 per roof. Prices in Peterborough depend on access, layers to remove and the membrane. See [pricing](https://flat-roof-repair.ca/pricing/). **Why does my flat roof in Peterborough leak in late winter?** Melting snow refreezes at drains and edges overnight, then backs up under seams and flashings during the day. See [ice and snow damage](https://flat-roof-repair.ca/problems/ice-and-snow-damage/). **Do I need a permit to replace a flat roof in Peterborough?** City: re-shingling a roof needs no permit if there is no structural modification. 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 Peterborough 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 Peterborough?** Yes, including Oshawa, Orillia, Belleville and the rest of central Ontario. See [Central Ontario](https://flat-roof-repair.ca/locations/central-ontario/). ## Related - [Flat roof repair in Central Ontario](https://flat-roof-repair.ca/locations/central-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/) - [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