Most homes have asphalt shingles, and how long they last depends on the type: three-tab shingles run about 20 years and thicker architectural (laminate) shingles about 30 as a standard estimate, though real-world life is often shorter than the printed warranty, because warranties assume ideal install and ventilation. Canada's freeze-thaw cycles, summer heat, and ice are hard on shingles. As they age they curl, lose their protective granules, grow moss, and stop shedding water reliably, and a failing roof leads to leaks and decking/structure damage underneath.
$8,000 to $18,000 to re-roof in the GTA (asphalt; more for steep/large/multi-layer or metal)Address soonRoofing
The quick answer
Asphalt shingles last about 20 years (three-tab) to 30 (architectural), and Canadian freeze-thaw shortens that, watch for curling, granules in the gutters, moss, or stacked layers. Roof age is a strong negotiation lever and can affect insurance. A re-roof runs about $8,000 to $18,000 in the GTA. Ask the documented age and factor the remaining years into your offer; a roofer confirms up close.
You are reading the roof near end of life page. Type the year the house was built and I will tell you what else tends to be true at that age, what it costs, and what to ask. One number, ten seconds.
Free. No account. Educational and impartial, not a home inspection.
Why it matters
A re-roof is one of the larger predictable costs in a home, and roof age is a strong negotiation lever. It also affects insurance, some insurers limit or decline coverage on roofs past a certain age, regardless of how the shingles look. Knowing roughly how many years are left changes your offer.
How to spot it
Curling or cupping shingles; bald patches and granules collecting in the gutters; moss or dark algae streaks; a sagging or wavy roofline (a possible structural or decking issue); multiple layers of shingles (a re-roof installed over an old one, which shortens life and complicates the next job); and patched areas. Ask the agent the roof's age and whether it has ever been fully replaced.
What it costs
GTA re-roofs on a detached home run about $8,000 to $18,000 for architectural asphalt ($5.50 to $8.50 per square foot); steep, large, multi-layer tear-offs, or premium materials go higher. Smaller/simpler roofs can come in under that band.
What to do
Address soon. Get the documented age, budget for replacement timing, and factor remaining life into your offer. A roofer confirms condition up close, never walk a roof yourself.
Education and triage, not a home inspection. Casaroo estimates remaining roof life from ground-level photos, a roofer confirms it up close. We flag; we don't certify.
Common questions
Will insurance be a problem on an old roof?
It can be. Some insurers limit or decline coverage on roofs past a certain age regardless of how the shingles look, which means the roof's age can affect whether you can insure the house at all. Ask your broker before conditions come off.
How much is a re-roof?
$8,000 to $18,000 for architectural asphalt on a GTA detached home. Steep, large, or multi-layer tear-offs and premium materials go higher, and smaller simpler roofs come in under that band.
The listing says the roof has multiple layers. Does that matter?
Yes. A re-roof installed over an old one shortens the life of the new shingles and makes the next job more expensive, because the tear-off is bigger. Ask how many layers are up there and whether it has ever been fully stripped.
Can I use roof age to negotiate?
It is one of the strongest levers available, because the age is usually documented and the cost is large and well understood. Get the documented age rather than the agent's estimate.
Lifespans are estimates that vary with climate, install quality, and ventilation; insurer roof-age rules vary. Confirm with your broker, and a roofer confirms condition. Casaroo flags, it does not inspect.
Last reviewed 2026-07-10.
This guide is general education, not a home inspection and not advice for your specific property. Always
consult the appropriate licensed professional, and get a licensed home inspection before you remove conditions
or buy. Cost ranges are 2026 estimates that vary by region, size, and access; confirm specifics with a
qualified professional.