Tin Roof Flashing Around Chimney

A continuous sheet metal apron across the chimney s downslope face l shaped step flashing running up both sides and when the chimney sits below the roof ridge a cricket or saddle running across the upslope face.

Tin roof flashing around chimney.

Chimney boot for a metal roof. Apply a generous amount of roofing cement behind the flashing. Base flashing has several components. Cover any exposed nail or screw heads with roofing cement.

Fold closure 90 degrees and. 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. Flashing is a method of weatherproofing the base of a chimney. Apply butyl tape to the underside of the closure.

What is chimney flashing. Flashing is often made of metal which is the norm on a metal roof. The bent edge should fit around 1 corner of the chimney. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in.

According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse. Bend the clipped flashing around the chimney. Pound the flashing into the grooves and fasten with the drive in expanding anchors. Use tin snips to clip the flashing at the point where the other side of the chimney lies against the flashing.

Chimney flashing exists at the base of the stack. Bend legs up the chimney sides about 1 inch. So chances are if you ve been looking into your roof and its flashing you have questions. Panels above the chimney should be removed.

Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks. Apply roofing cement to the joint between the flashing and brick. It s typically made of thin pieces of impenetrable material which inhibits water leaking around the chimney preserving the building from moisture and mold issues. We ve discussed flashing on roofs in our previous article roof leak investigations.

Use masonry nails or screws to reattach the flashing tight against the chimney. 3 unexpected causes of roof leaks and waterproofing masonry chimneys. Trim panels to fit around the chimney. The part of the flashing that lies flush with the roof should overlap the roofing shingles.