Roofing Contractors in Toronto

For a straight re-shingle or flat-roof membrane replacement to the same configuration, a permit is generally not required from the City of Toronto. However, if the work involves structural repairs to the deck or rafters, addition of a skylight, dormer construction, or a change in roof slope or profile, a City of Toronto building permit from the Building Division is required. For heritage-designated properties, a change in roofing material visible from the street may also require Heritage Preservation Services review. When in doubt, confirm with the City before work begins.

Flat and low-slope roofs are common in Toronto on Victorian and Edwardian semi-detached and row houses, rear kitchen additions, and bay-window tops. These sections require membrane roofing systems - modified bitumen (SBS or APP), EPDM rubber, or TPO - not asphalt shingles. Flat roofs in Toronto require careful attention to drain placement, parapet height, and membrane termination, particularly at the junction with the pitched main roof. A poorly detailed flat-to-pitched junction is a leading source of water infiltration in Toronto's older housing. Confirm your roofing contractor has specific flat-roof membrane experience, not just pitched-roof experience.

Possibly. Properties designated under Part IV or Part V of the Ontario Heritage Act may have roofing materials listed as character-defining features - most commonly original slate, clay tile, or copper flashings on Victorian and Edwardian properties. Replacing these materials with a visually different product that is visible from the street may require Heritage Preservation Services approval before a building permit is issued or before any work is done. If your property is listed on the City of Toronto Heritage Register or designated under the Ontario Heritage Act, confirm heritage status before signing a roofing contract.

Roofing is among the highest-risk trades under WSIB. Verify active WSIB clearance, a minimum $2M general liability policy (ideally $5M for taller homes or multi-storey Victorian properties in the inner city), and manufacturer certification if you want an extended product warranty backed by the shingle or membrane manufacturer. For chimney flashing work near gas appliance vents, confirm the roofer understands TSSA clearance requirements. Request all certificates before signing a contract.