How To Roof Chimney Flashing

Cover any exposed nail or screw heads with roofing cement. Along the edges or closer if necessary to flatten the metal. A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit.

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Drip edges prevent water from seeping under roofing along the edges of rakes and eaves.

How to roof chimney flashing. Apply roofing cement to the joint between the flashing and brick. Continuous flashing protects the joint between a vertical wall and a sloped roof. Place the step flashing over the caulk and onto the chimney. 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.

Secure a shingle over the corner flashing using a hammer and roofing nail. Nail it to the roof along the top edge. Roof decks and chimney move independently as they are heated by the sun. Flashing is a method of weatherproofing the base of a chimney.

Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing. Use special masonry caulk to seal the joints between the flashing and the chimney. Place a second piece of 8 inch 20 3 cm flashing against the chimney. Galvanized roofing nails about every 6 in.

With the primary flashing and counter flashing connected this differential movement could potentially allow strain to develop in the mortar or pull at fasteners in the roofing assembly. Seal the sides of the chimney with prebent pieces of step flashing under each course of shingles photos 4 and 5. Use masonry nails or screws to reattach the flashing tight against the chimney. Cap flashing mortared or caulked into the chimney laps over the top edges of the other flashings to prevent water from running behind them.

The roof deck and the brick chimney are physically separated by the chase. Ensure the chimney s base flashing is in proper order secured to the roof as the manufacturer or mason recommends beneath the shingles. Hammer 2 roofing nails into the flashing and roof. Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound as shown at right.

If you were not provided with base flashing you can install step flashing up the side of the chimney. Slide the prebent and soldered chimney saddle into place behind the chimney. Flashing is often made of metal which is the norm on a metal roof. Apply a generous amount of roofing cement behind the flashing.

They re applied under roofing felt along eaves and over roofing felt along rakes. Place a small drop of caulk where the roof and chimney meet at the chimney corner.