Medium Urgency Service
Chimney and Flashing Repair
Chimney and flashing repair addresses failed or damaged flashing around chimneys, vents, and roof valleys -- a common, often-overlooked source of leaks that's frequently mistaken for a masonry problem.
Direct Answer
Chimney and flashing repair addresses failed or damaged flashing around chimneys, vents, and roof valleys -- a common, often-overlooked source of leaks that's frequently mistaken for a masonry problem.
Signs You May Need This Service
- rusted or visibly separated flashing around the chimney
- a leak concentrated near the chimney or a roof valley
- cracked or missing counter-flashing
- water stains on an interior wall near the chimney
- visible daylight or gaps where flashing meets the chimney masonry
Common Causes
- flashing sealant drying out and cracking after years of sun exposure
- storm wind lifting or bending flashing
- settling or shifting of chimney masonry over time
- improperly installed flashing during a prior roof job
- corrosion on older metal flashing
Mistakes to Avoid
- caulking over failed flashing as a permanent fix rather than replacing it
- assuming a chimney leak is a masonry problem when it's often the flashing
- delaying repair since chimney leaks can be slow and easy to underestimate
- mixing flashing metal types without accounting for galvanic corrosion
- skipping the water test after the repair
What Affects the Cost
- material choice (aluminum, copper, or galvanized steel)
- extent of surrounding roofing material affected
- chimney height and roof accessibility
- whether counter-flashing needs full replacement or just resealing
- whether this is bundled with a broader roof repair visit
What to Do Next
- Look for water stains on walls or ceilings near the chimney.
- Check visible flashing from a safe vantage point for obvious gaps or rust.
- Avoid caulking over the area yourself as a permanent fix.
- Request a professional assessment of the flashing and surrounding roofing material.
Before You Call
- Whether you've noticed a leak specifically near the chimney or a roof valley.
- How long you've noticed the issue.
- Whether you've had any previous chimney or roof work done.
- Your chimney's approximate age or material if known.
Frequently Asked Questions
Is a chimney leak always a flashing problem?
Not always, but flashing failure is one of the most common causes of a leak near a chimney. A professional inspection can confirm whether the issue is flashing, masonry, or both.
Can I fix chimney flashing myself?
This isn't recommended given the fall risk and the number of details -- fastener sealing, counter-flashing installation, a proper water test -- that affect whether the repair actually holds.
How much does chimney flashing repair cost?
Cost depends on material choice, chimney height and accessibility, and whether surrounding roofing material also needs attention. Get a specific estimate from your provider rather than assuming a fixed price.
How do I know if my chimney flashing needs full replacement or just resealing?
This depends on the extent of damage -- minor gaps may be addressed with resealing, while cracked, rusted, or separated flashing typically needs full replacement. A professional assessment can confirm which applies to your chimney.