EXTERIOR
How to Estimate Chimney Flashing Repair
Contractor method to estimate chimney flashing repair by chimney type, counter-flashing, sealant, access and labor with clear materials and labor lines.
Chimney flashing is where a roof most often leaks, and the repair is fiddly because it sits where masonry meets shingles. Step flashing, counter-flashing and sealant all play a part. This guide covers what to inspect, how to quote the repair and when the scope is really bigger than a patch.
THE SHORT ANSWER
How to Estimate Chimney Flashing Repair
A brick chimney with counter-flashing, sealant and 8 labor hours at $75 totals about $1,070.
Inspect the step and counter flashing
Step flashing runs alongside the chimney and counter-flashing locks into the masonry. Check both, plus the sealant at the joints, before you set a price.
- Chimney type
- Counter-flashing
- Sealant
- Roof access
Replacement vs re-caulk
If the metal is sound, new sealant can stop a leak for a fraction of the cost. If the step flashing is short or corroded, it has to come out and be replaced.
Access changes the hours
A steep roof or a tall chimney means more fall protection and setup time. Add those hours to the quote rather than eating them.
Compare flashing repairs
Ask for a scope that says what gets replaced versus sealed. Confirm the sealant type and whether the counter-flashing is re-set into the joint.