How To Fix Roof Flashing Around Chimney

Step flashing on roof peak.

How to fix roof flashing around chimney.

Http amzn to 2cjy6ev get the reinforcement fabric here. Applying roofing cement to gaps between metal 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. Fit an 8 inch 20 3 cm piece of square step flashing over the chimney s front corner.

Set the flashing aside. The only way to repair flashing is to replace it. Use special masonry caulk to seal the joints between the flashing and the chimney. Chimney roof leaks are usually caused by gaps or cracks between the metal flashing used to join the chimney to the roof and the chimney.

Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing. Use a chisel to remove any hardened roofing cement. Roof shingle over step flashing. Place the step flashing over the caulk and onto the chimney.

Apply a generous amount of roofing cement behind the flashing. Http amzn to 2ajekf4 visit us at. Place a small drop of caulk where the roof and chimney meet at the chimney corner. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.

Chimney flashing is usually found under the shingles at a 90 degree angle. Bend the corner flashing tightly around the corner. Clean any leaves or other debris out of the gap between the flashing and 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.

Use masonry nails or screws to reattach the flashing tight. Before going up on the roof to do the replacement it is recommended that measurements are taken around the chimney so that the flashing can be ordered. Leaks around fireplace chimneys are common and can be hard to identify the source. Hammer 2 roofing nails into the flashing and roof.

Bend a piece of cap flashing to fit around the top corner of the chimney and add the cap flashing across the back of the chimney.