Roofing Services — Frequently Asked Questions

In Canada, roofing contractor licensing requirements vary by province. In Ontario, look for RenoMark-certified contractors or WSIB-registered businesses. In Alberta and BC, look for contractors registered with WorkSafeBC or WCB Alberta. In Quebec, renovation contractors must hold a Régie du bâtiment (RBQ) license. Always request the contractor's WSIB clearance certificate (workers' compensation) and general liability insurance certificate before signing any contract.

Roof replacement in Canada ranges from approximately CAD $8,000–$15,000 for standard asphalt shingles on an average home. Metal roofing runs CAD $15,000–$35,000. Tile or cedar shake shingles run CAD $15,000–$40,000. Prices vary significantly by province — BC and Ontario tend to be higher than prairie provinces. All prices are in Canadian dollars and include HST/GST where applicable.

For most Canadian climates: architectural (dimensional) asphalt shingles with a minimum 30-year warranty and an ice and water shield membrane at eaves and valleys. In Alberta and prairie provinces prone to large hail: Class 4 impact-resistant shingles. For areas with extreme snow loads (northern ON, BC interior, Maritimes): metal roofing handles snow shedding better than asphalt. In coastal BC: algae and moss-resistant shingles are essential given the persistent moisture.

Permit requirements vary by municipality. Most Canadian cities require a building permit for full roof replacement, particularly if decking is being replaced. Your roofing contractor should pull the permit — ask specifically whether they will. Verify with your local building department if your contractor says permits aren't required. Unpermitted work can create complications at home sale, mortgage renewal, and insurance claims.

Ice dams form when heat escaping through the attic melts snow that refreezes at the cold eave, backing water under shingles. Prevention: air seal the attic floor (stop heat from escaping the living space) then add attic insulation to R-50 or higher (minimum for most Canadian climate zones). Install ice and water shield membrane at least 900mm inside the exterior wall line. Ensure proper soffit and ridge ventilation. Adding heat cables to problem eaves treats the symptom; air sealing and insulation treats the cause.

WSIB (Workplace Safety and Insurance Board) in Ontario — and equivalent bodies (WCB, WorkSafeBC, CNESST) in other provinces — provides workers' compensation insurance. If a roofer without WSIB coverage is injured on your property, you as the homeowner may be liable for their medical costs and lost wages. Always ask for a WSIB clearance certificate dated within 30 days before work begins. This is a legally important protection for homeowners in Canada.

Contact your insurance company promptly after storm damage — most policies have a reporting deadline. Document all visible damage with photos before any repairs. Schedule a contractor assessment before or at the same time as the insurance adjuster's visit — adjusters sometimes miss damage that affects claim scope. Your insurer will typically pay based on ACV (actual cash value) or RCV (replacement cost value) depending on your policy. Deductibles apply. Public adjusters are available in Canada for large or disputed claims.

Standard 3-tab asphalt shingles: 15–20 years. Architectural (dimensional) shingles: 25–30 years. Impact-resistant architectural: 30–40 years. Metal standing seam: 40–70 years. Cedar shake: 20–30 years with proper maintenance. Lifespan varies significantly by climate — extreme cold, UV exposure, hail, and ice cycling all affect durability. Proper attic ventilation and insulation are the biggest non-material factors in maximizing shingle lifespan.

Late spring through early fall (May–October) is the optimal window for most Canadian markets. Asphalt shingles require minimum installation temperatures (typically +5°C) to properly seal. Winter installations are possible with modified techniques but carry more quality risk and may require additional precautions in cold regions. If your roof is actively leaking, emergency temporary repairs can be done year-round — don't wait for the 'right season' if you have active water intrusion.

Compare: specific material brand, product line, and warranty tier. Number of layers being removed (if re-roofing). Ice and water shield coverage area. Ventilation assessment and modification scope. Permit included or not. WSIB/WCB compliance. Contractor workmanship warranty (in addition to manufacturer's). Timeline and cleanup protocol. Never compare based solely on final price — material specifications can differ dramatically between quotes and produce very different long-term outcomes.