Roof Replacement in Toronto:
Complete asphalt shingle & flat roof solutions for Toronto homes
In Toronto, roof replacement protects homes from heavy snow, ice dams, and freeze-thaw cycles. This page covers full tear-offs, shingle and flat roof installs, and what to expect during your project. Licensed roofers serve Scarborough, North York, Etobicoke, and all GTA neighborhoods. Get a free estimate and schedule your replacement before the next winter season.
What Roof Replacement in Toronto Includes
Roof replacement in Toronto removes your old shingles or flat roof membrane and installs a new weatherproof system built for snow, ice, and freeze–thaw cycles.
A standard replacement includes:
• Full tear-off and disposal
• Roof deck inspection
• Ice-and-water barrier
• Underlayment
• Architectural shingles or TPO/EPDM membrane
• Flashing installation
• Final cleanup
Asphalt shingles take 2–3 days and last 20–25 years.
Flat roofs (TPO, EPDM, modified bitumen) take 3–5 days depending on size.
Toronto Homeowners Replace Roofs After 15–25 Years of Weather Damage
Homeowners in Scarborough, Etobicoke, and East York see curled shingles, granule loss, and attic leaks after two decades of snow load and UV exposure. Toronto’s freeze–thaw cycles crack old asphalt shingles faster than in milder climates. Flat roofs pool water if drains clog during spring melt.
Asphalt Shingle and Flat Roof Systems Both Work Well in Toronto's Climate
Pitched roofs on detached homes use architectural shingles. Townhouses and condos in North York often have flat EPDM or TPO membranes. Both systems handle Toronto weather when installed correctly.
Shingles shed snow and ice naturally. Flat roofs offer rooftop deck space and easier HVAC access. You choose the system that fits your home's design and your needs.
Toronto building code requires ice-and-water barrier along eaves to prevent ice-dam leaks. Flat roofs need positive slope for drainage. We install both details on every project.
Roof Replacement Takes 2–5 Days Depending on Size and Material
A 1,500 sq ft bungalow in Scarborough takes 2 days for shingles. A 3,000 sq ft two-storey in Etobicoke takes 3–4 days. Flat roofs add 1–2 days for membrane welding.
Fast turnaround limits weather exposure. Most homes are watertight by day one. You stay dry even if rain arrives overnight.
Summer and early fall offer the best weather windows. Winter installs are possible but slower due to cold-temperature adhesive requirements. We work year-round and adjust methods to match condition
Missing Shingles and Persistent Leaks Signal It's Time to Replace Your Roof
Homeowners spot bald patches, cracked flashing, sagging decking, or attic water stains after wind storms or heavy snow. These signs mean your roof has reached the end of its service life. Repairs become frequent and costly.
Replacing now prevents interior damage, mold, and structural rot that cost more to fix later. You avoid ceiling stains and insulation damage. Your home stays dry and healthy.
Toronto's spring melt reveals hidden leaks. Schedule a free inspection in April or May to plan your replacement before summer. We assess your deck, flashing, and ventilation during the visit.
Proper Ventilation and Ice-Dam Prevention Extend Your New Roof's Lifespan
Ridge vents, soffit vents, and attic insulation reduce heat buildup that melts snow and forms ice dams along eaves. Balanced airflow keeps shingles cooler in summer and prevents premature aging. Ice-and-water barrier protects vulnerable edges.
You avoid the cycle of melting and refreezing that damages shingles. Your new roof lasts its full 20–25 years. Energy costs drop when attic temperatures stay stable.
Toronto building code mandates 1:300 ventilation ratio. We install baffles to maintain airflow in cathedral ceilings common in older North York homes. Every replacement includes a ventilation review.
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Answering your questions
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FAQs
How many roof vents does a Toronto home need?
Most homes need one square foot of vent area per 300 square feet of attic space. A typical Toronto home with 1,200 square feet of attic requires four square feet of total vent area split between intake and exhaust. That usually means four to six vents depending on the size of each unit. We measure your attic during the free inspection and calculate exact requirements.
Can I install roof vents on a flat roof in Toronto?
Yes, we install low-profile mushroom vents or powered exhaust fans on flat roofs. Mushroom vents sit just above the roof surface and allow passive airflow. Powered fans use small motors to pull hot air out when attic temps climb. Flat roof ventilation works differently than sloped roofs but still removes heat and moisture from the space below your roof deck.
Do roof vents help lower cooling costs in summer?
Proper ventilation reduces attic heat by 20 to 30 degrees during Toronto summers. When your attic stays cooler, less heat radiates down into living spaces. Your air conditioner runs fewer cycles to maintain indoor temps. Most homeowners notice lower electricity bills in July and August after we upgrade their roof vents.
Will adding roof vents void my shingle warranty?
No, most asphalt shingle manufacturers require adequate ventilation to honor warranties. Poor ventilation causes premature shingle failure from heat damage. Adding vents protects your warranty coverage and extends shingle life. We provide documentation of vent installation that you can submit with any future warranty claims.
How soon can a contractor install roof vents in Toronto?
We schedule most vent installations within one to two weeks of your call. Emergency slots open up for homeowners dealing with leak-related vent failures or ice dam problems. Single-vent jobs often qualify for same-day or next-day service. Larger projects that involve multiple vents or ridge vent installation may need a few extra days for material delivery.
Do I need a permit for roof vent installation in Toronto?
Minor vent additions rarely require permits from the building department. Adding two to four box vents or one ridge vent falls under routine maintenance. Major re-venting during a complete roof replacement may need approval if you change the roof structure. We check permit requirements during your free inspection and handle applications when needed.