How To Repair A Roof Leak Around A Chimney

Inspect the flashing for gaps or cracks.

How to repair a roof leak around a chimney.

To repair chimney flashing leaks. Position an extension ladder securely against the edge of the roof. Extend the ladder up so the top rung is at least 3 feet above the edge of. The mud cap or the mortared area around the top of the chimney is often a culprit.

Apply roof cement to any gaps or cracks. Use a chisel to remove any hardened roofing cement. How to fix a leaky roof by a chimney. Use special masonry caulk to seal the joints between the flashing and the chimney.

Clean any leaves or other debris out of the gap between the flashing and chimney. Use masonry nails or screws to reattach the flashing tight against the chimney. Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing. If portions are missing or bent.

Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound as shown at right. Apply a generous amount of roofing cement behind the flashing. Cracked or loose mortar can allow. Inspect the flashing at the top sides and bottom edge of the chimney.