Residential Roofing in Ontario
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.
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All residential roofing, ranked by score and relevance
137 businesses. The order weighs each business's overall score by how much of its reviewed work is residential roofing, so a lower-scored specialist can rank above a higher-scored generalist. Filter and sort below, or open the full map view.
When you submit a quote or contact form through this site, your enquiry may be shared with partner providers who can do the work. We may earn a referral fee from these partners, but our rankings and scores are determined solely by our published method and are never affected by referral fees.
Common questions about residential roofing
- How much does a new roof cost in Mississauga?
- For a standard asphalt shingle re-roof on a typical detached home, expect a wide range depending on roof size, pitch, and how many layers need tearing off. Steeper roofs, multiple layers, and complex rooflines (dormers, valleys, multiple vents) push costs up. Get at least three itemized quotes since pricing varies significantly by contractor and material choice, and be wary of quotes that seem far below the others without an obvious reason.
- How often does a roof need to be replaced?
- Asphalt shingle roofs in the Mississauga climate typically last 20-25 years, sometimes less if the original installation skimped on ventilation or ice-and-water shield. Metal roofing can last 40-50+ years. Regardless of age, get an inspection after major hailstorms or windstorms, and any time you see granules collecting in gutters, curling or missing shingles, or daylight through the attic.
- What should I expect during a roofing job?
- A full tear-off and reshingle on an average home usually takes one to three days depending on size and weather. Expect noise, debris in the yard (a dumpster or trailer is typically parked on the driveway or street), and some vibration inside the house during tear-off. A good crew protects landscaping and windows, uses a magnetic sweep for nails afterward, and walks you through the finished roof before leaving.
- How can I tell if a roofing job was done well?
- Check that shingle lines are straight and courses are even, flashing is new (not reused) around chimneys and vents, nail placement follows the manufacturer's pattern rather than being overdriven or crooked, and ridge vents are properly sealed. Ask for photos of the deck before shingles went on, since that's the part you can't see once the job is finished. A contractor who's proud of the work will have these photos ready.