Metal roofing has become a common upgrade for Mississauga homeowners who want a roof that outlasts two or three rounds of asphalt shingles. The category covers standing seam panels, metal shingles (often styled to look like slate or cedar shake), and corrugated or ribbed steel panels, installed on new builds, full tear-offs, or in some cases over an existing roof deck. We track 7 metal roofing businesses serving the Mississauga area, ranging from crews that specialize only in metal to general roofing contractors who offer it alongside asphalt and flat roofing.
What the work actually involves
A proper metal roof install starts with tearing off or preparing the existing roof deck, adding synthetic underlayment (and ice-and-water shield along eaves and valleys, which matters given Ontario's freeze-thaw winters), then installing the metal panels or shingles with the correct fastening system. Standing seam roofs use hidden clips so no screws penetrate the panel face, which is part of why they cost more but last longer and leak less over time. Flashing detail around chimneys, skylights, and vents is where most metal roof failures actually start, so it's worth asking a contractor to walk through their flashing approach specifically.
What to look for before hiring
Check that the contractor carries WSIB coverage and liability insurance, ask whether they're a manufacturer-certified installer (several metal panel and shingle brands require this for warranty coverage to apply), and get the panel gauge and coating type in writing. Steel panels typically run 24-26 gauge with a Kynar or SMP paint finish; thinner gauge or a cheaper coating will show up as a lower price now and faster fading or denting later. Ask for photos of past jobs specifically with visible flashing work, not just wide shots of a finished roof.
How our scoring helps
Each contractor's score weighs verified licensing and insurance, review volume and rating consistency, responsiveness, and how long they've been doing metal roofing specifically rather than roofing in general. For a side-by-side ranking of all 7 alongside the rest of the city's roofing contractors, see the ranked guide to Mississauga's best roofing contractors. Our full scoring breakdown is explained on the methodology page.
