Roof Replacement in Montreal, QC: Complete Cost & Installation Guide

Roof replacement costs in Montreal vary significantly based on roof size, material choice, and structural complexity. A typical 1,500–2,000 sq ft residential roof averages CA$12,000–CA$18,000 for asphalt shingles, while premium materials like architectural shingles, metal roofing, or cedar shake run CA$18,000–CA$25,000+. Labour costs in Montreal typically range from CA$5–CA$8 per square foot, accounting for local wage standards and the challenges of working in Quebec's climate.

Factors affecting your final quote include roof pitch (steep roofs cost more to install), structural repairs needed (rotted decking or trusses add CA$2,000–CA$8,000), and accessibility. Homes with chimneys, skylights, or complex valleys require additional flashing and labour, increasing costs by 10–20%. Most quotes are provided per "square" (100 sq ft), with Montreal roofers typically charging CA$350–CA$600 per square for standard asphalt installations.

The roof replacement process typically takes 1–3 days for a standard residential roof in Montreal, weather permitting. Your contractor will begin by removing the old shingles, underlayment, and flashing—a process called tear-off. Once old materials are stripped away, the roofing team inspects the underlying decking (usually plywood or OSB) for damage, rot, or structural issues. Any compromised decking is replaced before new underlayment is installed, which protects against water infiltration during Quebec's rainy seasons and protects the interior during the installation period.

New flashing is installed around chimneys, vents, valleys, and other penetrations to prevent leaks. The contractor then installs new shingles, starting from the bottom edge (eaves) and working upward in overlapping rows to direct water down and away from your home. Ridge caps are installed last, sealing the peak. Throughout the process, old materials are loaded into debris bins and properly disposed of or recycled. Professional crews maintain safety protocols, including fall protection and proper equipment setup, which is especially important for Montreal's steeper-pitched roofs designed to shed snow.

In Montreal, roof replacement permits are typically required, particularly if structural work or repairs are involved. The City of Montreal's by-laws require that roofing work comply with the National Building Code of Canada and Quebec Building Code standards. Before work begins, your contractor should apply for a permit through your local Montreal borough office—failure to obtain permits can result in fines and complications when selling your home.

Permit costs in Montreal range from CA$200–CA$500 depending on project scope and your specific arrondissement (borough). Most permits take 5–10 business days to approve. Quebec building code requirements for Montreal specifically mandate that roofs must support snow loads (typically 2.0–2.5 kN/m² depending on your location), which influences material selection and structural considerations. If your roof replacement includes new ventilation, skylights, or structural modifications, additional inspections may be required. Always verify permit requirements with your contractor or local borough before obtaining quotes.

Most Quebec homeowner insurance policies cover roof replacement if damage results from covered perils like severe storms, hail, or wind. However, normal wear and tear—the most common reason for Montreal roof replacements—is not covered by standard insurance. When filing a claim for weather-related damage, be prepared to explain the damage to your insurer and provide photos of the affected areas.

If your claim is approved, your insurance will pay the replacement cost minus your deductible. Montreal homeowners typically have deductibles ranging from CA$500–CA$2,500, depending on their policy. Some insurers offer lower deductibles for newer roofs or homes in lower-risk areas. Before accepting a roofing contractor's estimate, verify with your insurance company whether the damage qualifies for coverage. If you're replacing a roof due to age rather than damage, this is an out-of-pocket expense not covered by insurance. Some Montreal contractors offer financing options or payment plans to help spread the cost.

A standard residential roof replacement in Montreal takes 1–3 days, depending on weather, roof size, and complexity. Your contractor will confirm the exact timeline during the quote consultation. Before work begins, ensure gutters are cleared, vehicles are moved from the driveway (to avoid debris), and loose outdoor items are secured. Snow and ice should be cleared from the roof if work is scheduled during winter months.

During installation, expect noise from power tools, nail guns, and equipment. You may also experience temporary disruptions to water supply if roof penetrations require work, or minor disruptions to power if electrical vents are involved. Most crews work between 8 a.m. and 5 p.m., Monday through Friday, though timing varies by contractor. Once installation is complete, the contractor will perform a final walkthrough with you, address any punch-list items, and remove all debris. Your new roof comes with a manufacturer's warranty (typically 20–30 years) and a labour warranty from your contractor (usually 5–10 years). Keep all warranty documentation for insurance and resale purposes.