Fix Roof Flashing Around Chimney

Roof shingle over step flashing.

Fix roof flashing around chimney.

Water test the roof at the area of the chimney using a garden hose. Use a chisel to remove any hardened roofing cement. Use masonry nails or screws to reattach the flashing tight against the chimney. The following are the most common reasons for leaks around chimneys.

Step flashing on roof peak. Use special masonry caulk to seal the joints between the flashing and the chimney. Flaws in the roofing material above or adjacent to the chimney there may be a broken slate or tile nearby that is causing a leak. Whether the problem is roof repair flashing replacement or.

To do this ask an assistant to observe the area of the ceiling near the chimney and run water along the sealed gaps of the. Apply a generous amount of roofing cement behind the flashing. If you do not wish to form your own corner flashing you can buy pre bent pieces and cut them to size or use a piece of corrugated aluminum which is easier to bend. Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound as shown at right.

Bend the corner flashing tightly around the corner. Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing.