The honest version of the repair-versus-replace decision, what is genuinely fixable, and the point where another patch is money thrown at a roof that has finished.
Reviewed by Michael ThompsonRoof repair means fixing a localised failure - a torn section, a bad flashing detail, cracked boots, blown-off shingles - while the rest of the covering keeps doing its job. It is the right answer when the damage has a boundary you can draw around it. Once wear shows across whole slopes, repairs stop being repairs and become instalments on a replacement you are going to buy anyway.
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Locating the actual failure, not just the visible one
A roofer works the slope above the symptom, checking penetrations, valleys, transitions and fastener lines. Most repairs turn out to be a detail - a flashing, a boot, a nail - rather than the shingle field itself.
Watch forA quote written from the driveway. Nobody can scope a repair from the ground, and a repair priced without an inspection is a guess that will be revised upward on the day.
A scoped, written repair - with a boundary
A competent repair quote says which slope, which detail, how many shingles or feet of flashing, and what happens if the deck underneath is soft. It reads like a small job, because it is one.
Watch forA repair quote that has quietly grown into a partial re-roof of the whole elevation. If the scope keeps expanding, ask whether you are actually being sold a replacement in instalments and price it as one.
Opening up and checking the deck
Damaged material comes off, and the sheathing underneath gets checked. Long-standing leaks soften plywood, and covering wet wood back up guarantees a return visit.
Watch forNobody mentions the deck at all. If water has been getting in for months, something under there is wet. Silence on that point usually means it was not looked at.
Repair, blend and seal
New material goes in, tied into the surrounding courses so water runs over the repair rather than into its edges. Flashings are replaced rather than re-sealed where they have failed.
Watch forRoofing cement smeared over a problem. Sealant is a legitimate part of some details and a legitimate emergency stopgap, but a bucket of tar troweled onto a leak is a repair with a shelf life measured in months.
Colour match, and the honest conversation about it
Shingles fade. A repair on a fifteen-year-old roof will be visible from the street no matter who does it, and a roofer worth hiring tells you that before the work rather than after.
Watch forA promise of an invisible match on an old roof. It cannot be done, and the promise tells you how the rest of the conversation is going to go.
Most single-issue roof repairs - a vent boot, a flashing detail, a small blown-off section - land in the low hundreds to low thousands, driven by access, pitch and how much deck is wet underneath. Larger structural work moves into replacement territory. Our cost guide has the detail.
See the full roof repair cost guide - by material, size and region →
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Twenty years on and around home improvement work. Reads our guides for the things that are technically true and practically wrong.
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