Toronto has 147 businesses listed under roofing contractor, covering everything from small repair crews to full replacement companies working on shingle, flat, metal, and torch-on membrane systems. The work ranges from patching a flashing leak after a storm to tearing off and re-decking an entire roof, plus related jobs like eavestrough replacement, attic ventilation, and ice dam prevention that matter a lot given Toronto's freeze-thaw winters.
What to look for before you hire
Roofing is one of the easier trades to get burned on because most of the work is invisible once it's done. A few things separate reliable contractors from the rest: a physical business address and WSIB coverage (workers' compensation), manufacturer certification if you want a real shingle warranty, a written estimate that specifies materials, layers of tear-off, and underlayment rather than just a lump sum, and a crew that pulls a permit when the job requires one. Ask how they handle flashing around chimneys and vents, since that's where most leaks start, not the field of the roof itself.
How we score contractors
Our ranking weighs review volume and consistency, how contractors respond to complaints, licensing and insurance signals, and how long a business has been active in Toronto. The full breakdown of criteria is on our methodology page. For a shortlist of the highest-scoring companies in this category, see our best roofing contractors in Toronto guide.