Top 10 Roofing Contractor in London, ON

Demand proof of active WSIB compliance and Working at Heights certificates specifically for the sub-trade crew actually stepping onto your roof, not just the primary estimator.

Inspect the contract for a dedicated ice-and-water shield clause requiring at least six feet of self-adhering membrane coverage from the eave edge to combat London's heavy lake-effect snow loads.

Verify the contractor's local physical business address in London, ON, avoiding storm-chasing operations that utilize temporary P.O. boxes or out-of-province phone numbers.

Confirm that your roofing estimate includes a detailed breakdown of attic ventilation calculations, balancing intake soffit vents with exhaust ridge vents.