Where do most chimney leaks come from?
In order of frequency: cracked or missing crown (#1), failed flashing where chimney meets roof (#2), missing or damaged cap (#3), porous unsealed brick (#4), and damaged mortar joints (#5). We always diagnose before quoting a repair.
How do you find the source of a chimney leak?
Visual exterior inspection plus camera scan plus pressurized water testing — we systematically wet each component until water reproduces the leak inside. This isolates the actual entry point so we can fix it once, instead of guessing and patching.
Can a chimney leak through the brick itself?
Yes. Brick is porous and absorbs water during freeze-thaw cycles. Untreated brick can transmit water through to interior surfaces, especially on north-facing chimneys exposed to driving rain. Vapor-permeable waterproofing solves this without trapping moisture.
Will my homeowner's insurance cover chimney leak damage?
Sudden damage (storm, fallen tree, lightning) is usually covered. Slow ongoing leaks from worn components (crown deterioration, flashing wear) are typically considered maintenance and not covered. We provide reports to support claims either way.
How long does leak repair take?
Diagnosis: 1–2 hours. Crown sealing: same-day. Flashing repair: 4–8 hours. Brick waterproofing: 1 day. Major rebuilds: 3–7 days. We always give a written timeline before any work begins.
What does chimney leak repair cost?
Diagnosis: $150–$300 (free with most repairs). Crown sealing: $400–$1,200. Flashing repair: $800–$2,500. Brick waterproofing: $600–$1,500. Free written quote within 24 hours of diagnosis.
How long will the leak repair last?
Crown sealants last 10–15 years. New step + counter flashing lasts 25+ years. Brick waterproofing lasts 10+ years. We back all of it with a lifetime workmanship guarantee — if our repair fails, we come back and make it right.
Should I wait until the leak gets worse before fixing it?
No. Chimney leaks accelerate damage exponentially — water in the masonry freezes and expands, turning small problems into big ones over a single winter. Same-week diagnosis is almost always cheaper than waiting through one more rain.
