How To Fix Roof Flashing Around 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.

How to fix roof flashing around chimney.

To repair loose roof chimney flashing. It is attached to one side of the chimney and one side on the roof. Step flashing on roof peak. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.

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

Pound the flashing into the grooves and fasten with the drive in expanding anchors. Roof shingle over step flashing. Set the flashing aside. Place the step flashing over the caulk and onto the chimney.

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. Http amzn to 2ajekf4 visit us at. Leaks around fireplace chimneys are common and can be hard to identify the source. Hammer 2 roofing nails into the flashing and roof.

Chimney flashing is usually found under the shingles at a 90 degree angle. Use masonry nails or screws to reattach the flashing tight. Bend the corner flashing tightly around the corner. Use a chisel to remove any hardened roofing cement.

Use special masonry caulk to seal the joints between the flashing and the chimney. Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing. Apply a generous amount of roofing cement behind the flashing. Place a small drop of caulk where the roof and chimney meet at the chimney corner.

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