Tin Roof Flashing Around Chimney

Flashing is any thin piece of metal and caulking that is used to prevent water from penetrating the outside of your home.

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. According to the federal emergency management agency fema improper roof flashing could lead to wood rot and even deck collapse. Cover any exposed nail or screw heads with roofing cement. Chimney flashing exists at the base of the stack.

Flashing is a method of weatherproofing the base of a chimney. Trim panels to fit around the chimney. Use masonry nails or screws to reattach the flashing tight against 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.

Apply a generous amount of roofing cement behind the flashing. So chances are if you ve been looking into your roof and its flashing you have questions. 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. Chimney boot for a metal roof.

Apply roofing cement to the joint between the flashing and brick. Flashing is often made of metal which is the norm on a metal roof. We ve discussed flashing on roofs in our previous article roof leak investigations. Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.

Pound the flashing into the grooves and fasten with the drive in expanding anchors. Base flashing has several components. Apply butyl tape to the underside of the closure. Bend legs up the chimney sides about 1 inch.

3 unexpected causes of roof leaks and waterproofing masonry chimneys. Bend the clipped flashing around the chimney. Use tin snips to clip the flashing at the point where the other side of the chimney lies against the flashing. A cricket is sloped like a tent roof to deflect water around the chimney.

The bent edge should fit around 1 corner of the chimney. The part of the flashing that lies flush with the roof should overlap the roofing shingles. Cut two opposing 45 degree notches into z closure to allow a 90 degree bend. 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.