Fix Roof Flashing Around Chimney

Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing.

Fix roof flashing around chimney.

Roof shingle over step flashing. Use masonry nails or screws to reattach the flashing tight against the chimney. 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. The following are the most common reasons for leaks around chimneys.

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. Water test the roof at the area of the chimney using a garden hose. For tile roofs the underlayment which keeps water out may be deteriorated. To repair loose roof chimney flashing.

Bend the corner flashing tightly around the corner. Clean any leaves or other debris out of the gap between the flashing and chimney. 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. Use special masonry caulk to seal the joints between the flashing and the chimney.

Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound as shown at right. Step flashing on roof peak.