Residential roofing covers everything from a full tear-off and reshingle to smaller repair work: fixing flashing around chimneys and vents, patching storm damage, replacing worn shingles, and re-sealing valleys where leaks usually start. In Mississauga, most homes run asphalt shingles, though metal roofing and flat/low-slope roofing (common on additions, garages, and some townhome complexes) show up regularly too. We've listed 11 residential roofing contractors serving the area, covering new installs, tear-offs, repairs, and inspections.
What a roofing job actually involves
A proper re-roof isn't just swapping shingles. It includes stripping the old layer down to the deck, checking the plywood or OSB sheathing for rot or soft spots and replacing any bad sections, installing ice-and-water shield along eaves and valleys (required by Ontario building code in freeze-thaw zones like Mississauga), laying underlayment, then shingles, and finishing with proper flashing at chimneys, skylights, and roof-wall junctions. Ventilation matters too: soffit and ridge vents that move air through the attic keep shingles from cooking in summer and prevent ice damming in winter. A contractor who skips the deck inspection or reuses old flashing to save time is cutting corners that show up as leaks within a few years.
What to look for before you hire
- Manufacturer certification: Installers certified by shingle manufacturers (GAF, IKO, Owens Corning) can typically offer stronger workmanship warranties, since the manufacturer has vetted their install process.
- WSIB coverage and liability insurance: Ask for current certificates, not just a verbal assurance. Roofing is dangerous work and this protects you if someone gets hurt on your property.
- Written, itemized quotes: The quote should specify tear-off vs. overlay, underlayment type, ice-and-water shield coverage, ventilation work, and disposal of old material. Vague one-line quotes are a red flag.
- Local permit handling: Larger jobs may need a permit through the City of Mississauga; a contractor who knows the local process saves you the hassle.
- Physical address and local crew: Companies based in or near Mississauga respond faster for warranty callbacks and storm-damage emergencies than out-of-area operators.
How our scoring works
We score each contractor on factors that matter for a roofing job specifically: verified licensing and insurance, review volume and rating trends over time, response speed to inquiries, and consistency of service across multiple jobs (not just a handful of five-star reviews). The full breakdown of how we weigh each factor is on our methodology page. For a ranked list of all 11 contractors with their scores, see our best residential roofing contractors in Mississauga guide.
