Guide
When to repair versus replace your roof
Jun 16, 2026 · Ottawa Service Directory · 4 min read
A few missing shingles is a repair. Widespread wear, leaks, or granule loss usually means replacement. How to tell which one you are looking at.
Most roofing calls come down to one question: is this a repair or a replacement? The honest answer depends on the age of the roof and how widespread the damage is.
Usually a repair
- A few shingles blown off after a storm
- A single, localized leak with no rot
- Flashing that has lifted around a vent or chimney
Usually a replacement
- An asphalt roof past roughly 20 years
- Widespread curling, cracking, or bald spots where granules have worn off
- Multiple leaks or any sag in the roof deck
Get more than one opinion for anything that sounds like a full replacement, and ask for photos of the problem area. A trustworthy roofer will show you the evidence rather than just quote a number.
Common questions
- How long does an asphalt shingle roof last in Ottawa?
- Most asphalt shingle roofs in Ottawa last about 20 to 25 years. Freeze-thaw cycles, ice dams, and sun exposure shorten that, so a roof past roughly 20 years with widespread wear is usually a replacement rather than a repair. Widespread curling or cracking, bald spots where granules have worn away, or more than one active leak are the clearest signs a roof has crossed that line.
- Should I repair or replace a roof with a single leak?
- A single, localized leak with no underlying rot is usually a repair. It tips toward replacement when the roof is old, the leak is one of several, or there is granule loss, curling, or any sag in the deck. Get more than one opinion and ask for photos. A few blown-off shingles or lifted flashing around a vent or chimney are the other classic small, localized fixes.
- When is the best time to replace a roof in Ottawa?
- Late spring through fall is ideal, when temperatures are mild enough for shingles to seal properly. Roofers work through winter when needed, but cold makes sealing harder, so non-urgent replacements are best booked before the cold sets in. Whatever the season, get more than one opinion and ask the roofer for photos of the problem areas before agreeing to a full replacement.
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