The chimney crown is the concrete or mortar slab that seals the top of the masonry chimney stack around the flue liner. When the crown develops cracks — which can happen due to seismic activity, freeze-thaw cycling, or simply age — water enters the masonry directly at the most vulnerable point and begins accelerating deterioration of the brickwork, liner, and interior structure. David & Sons Chimney Cleaning diagnoses crown damage during inspections and performs both minor crack repairs using elastomeric crown sealant and complete crown rebuilding using a properly sloped concrete mix for long-term water shedding.
A properly built chimney crown should extend past the edge of the chimney casing and slope downward to direct water away from the masonry face. Many older Sonoma-area chimneys were originally built with a flat or substandard mortar wash rather than a true poured crown, which cracks rapidly and provides poor protection. When we rebuild a crown, we form and pour it to current best-practice specifications, then apply a penetrating sealer to maximize water resistance.
Addressing a failing chimney crown early is one of the best ways to avoid far more expensive repairs to brickwork, flashing, and liner systems downstream. We serve Sonoma, CA and surrounding communities with honest evaluations and quality masonry repairs performed from the roof down.
- Licensed and fully insured technicians
- Free estimates and upfront pricing
- Same-day and emergency service available
- Commercial and residential expertise
- Satisfaction guaranteed on every job
- Locally owned — we know your area