What is a chimney crown and why does it matter?
The crown is the concrete or mortar cap on the top of your chimney — it covers the masonry around the flue tiles and is your chimney's primary waterproof barrier. When the crown cracks, water gets into the brick and mortar, causing freeze-thaw damage from the top down.
How do I know if my crown needs repair?
Hairline cracks visible from the ground or roof, white efflorescence staining on the brick below, water in the firebox after rain, or pieces of crown lying on the roof. Annual inspection catches all of these before they become major repairs.
What's the difference between resurfacing and rebuild?
Resurfacing means applying elastomeric crown sealant over the existing crown to bridge cracks and waterproof the surface — fast, cheaper, lasts 15 years. Rebuild means demolishing the old crown and pouring new — more expensive but lasts 30–50 years.
How long does crown repair take?
Crown sealant application: 2–3 hours, dries overnight. Full crown rebuild: 1 day demo + 1 day pour + 24 hours cure. Hairline crack repair: 1–2 hours. Always quoted with timeline upfront.
What does crown repair cost?
CrownSeal application: $400–$900. Hairline crack repair: $300–$600. Full crown rebuild: $1,500–$4,500 depending on chimney size and access. Free written quote within 24 hours of inspection.
How long does crown repair last?
CrownSeal elastomeric sealant: 15–20 years (with our 15-year warranty). Full crown rebuild: 30–50 years. Crack repair: extends crown life by 10–15 years if caught early enough.
Can crown repair be done in cold weather?
CrownSeal application requires temperatures above 40°F for proper cure. Full crown pours need above 50°F for 24 hours. We schedule crown work for spring through fall when possible. Emergency leak repairs we do year-round with cold-weather methods.
Will my insurance cover crown repair?
If the crown failure is sudden (lightning, storm, fallen tree) — usually yes. If it's gradual deterioration from age — typically no, treated as maintenance. We provide detailed inspection reports either way to support your claim.
