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.
How to roof chimney flashing.
A do it yourself video detailing step by step how to flash a chimney with our metal roofing chimney kit.
Drip edges prevent water from seeping under roofing along the edges of rakes and eaves.
Secure a shingle over the corner flashing using a hammer and roofing nail.
Ensure the chimney s base flashing is in proper order secured to the roof as the manufacturer or mason recommends beneath the shingles.
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.
Use special masonry caulk to seal the joints between the flashing and the chimney.
Apply a generous amount of roofing cement behind the flashing.
Renew flashing seals by chipping out the old mortar and caulking along the edges of the flashing.
Roof decks and chimney move independently as they are heated by the sun.
Slide the prebent and soldered chimney saddle into place behind the chimney.
Along the edges or closer if necessary to flatten the metal.
Place a second piece of 8 inch 20 3 cm flashing against the chimney.
The roof deck and the brick chimney are physically separated by the chase.
Flashing is a method of weatherproofing the base of a chimney.
Use masonry nails or screws to reattach the flashing tight against the chimney.
Place a small drop of caulk where the roof and chimney meet at the chimney corner.
They re applied under roofing felt along eaves and over roofing felt along rakes.
Flashing is often made of metal which is the norm on a metal roof.
Apply roofing cement to the joint between the flashing and brick.
Seal the sides of the chimney with prebent pieces of step flashing under each course of shingles photos 4 and 5.
Cap flashing mortared or caulked into the chimney laps over the top edges of the other flashings to prevent water from running behind them.
Hammer 2 roofing nails into the flashing and roof.
Galvanized roofing nails about every 6 in.
Nail it to the roof along the top edge.
Seal the seam between the cap and step flashing with urethane roofing cement or silicone caulking compound as shown at right.
Cover any exposed nail or screw heads with roofing cement.
