Most flashing repairs cost $200 to $500. A major repair or full replacement runs $500 to $1,500 or more. Here is the price by location, what moves it and the signs to look for.
Where the flashing sits decides most of the price, because it decides how much roofing has to come up to reach it.
Roof flashing repair cost by location
Flashing location
Typical repair cost
Roof vent pipe
$200 to $500
Roof valley
$200 to $850
Skylight
$200 to $500
Chimney
$200 to $1,000
Dormer
$250 to $1,000
Drip edge
$250 to $1,500
Complete flashing replacement
$1,000 to $1,500 or more
Source: HomeGuide’s roof flashing repair cost guide. Most roof repair contractors charge a minimum job fee of $250 to $300 or more, so a small fix rarely costs less than that.
What moves the price
Why two flashing quotes can differ
How far the damage goes
Minor repairs run $200 to $500 on HomeGuide’s figures; a major repair or full replacement is $500 to $1,500 or more. If water has rotted the decking under the flashing, that is extra.
Flashing type
Step flashing, valley flashing and counter flashing each take different techniques and time. Chimney flashing usually combines all three.
Material
Aluminum is the common residential choice. Galvanized steel is strong at a moderate price. Copper is the premium option and lasts 50 years or more. Rubber or PVC is used for vent pipe boots.
Roof pitch and access
Steep or multi-level roofs need harnesses, roof jacks or scaffolding, which adds labor.
An inspection first
HomeGuide puts a roof inspection at $100 to $400. Ours is free, with a written report and photos.
Signs your flashing needs repair
Water stains on ceilings or walls near a chimney, skylight or valley. They often show as discolored rings.
Rust or corrosion on metal flashing. Once it starts, the metal stops keeping water out.
Bent, cracked or missing pieces after high wind or a falling branch.
Flashing that has pulled away from the wall or chimney so water can get behind it.
A single cracked boot or a short run of loose step flashing is a repair. Flashing that is rusting across the roof, or flashing on a roof that is due for replacement anyway, is better replaced with the roof, because the old flashing has to come up when the shingles do.
HomeGuide puts minor flashing repairs at $200 to $500, and a major repair or complete replacement at $500 to $1,500 or more.
How much does chimney flashing repair cost?
$200 to $1,000, according to HomeGuide, depending on chimney size and how much of the flashing has failed.
Is there a minimum charge for flashing repair?
Most roof repair contractors charge a minimum job fee of $250 to $300 or more, per HomeGuide.
How long does copper flashing last?
Copper is the premium flashing material and lasts 50 years or more, per HomeGuide.
Can flashing be repaired without replacing the roof?
Usually, yes. Vent boots, step flashing and chimney flashing can be repaired on their own. Replacing the roof soon is the main reason to wait and do both together.
We get on the roof, photograph what is actually there, and hand you a written report with a price. No charge, and no obligation to book the work with us. If the roof has years left in it, that is what the report will say.
