The cost to fix a chimney leak varies significantly depending on the underlying cause and the extent of the damage. Minor repairs, such as installing a new chimney cap or sealing minor flashing gaps with polyurethane roofing cement, typically cost between $150 and $400. Moderate repairs, such as repairing a cracked concrete chimney crown or tuckpointing degraded mortar joints, generally range from $500 to $2,500. Extensive structural repairs or rebuilding a damaged chimney stack can cost several thousand dollars. You can troubleshoot repair costs safely by getting professional evaluations from certified masons. You can verify that your corrective action is successful when hiring an expert to fix the specific root cause eliminates leaks while staying within your anticipated budget.
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