9 Best Of How To Roof Flashing Best Resolution Image. Aug 31 2020 Simply put roof flashing is any piece of sheet metal that forms a joint between the roof and objects that protrude from the roof such as dormers chimneys and pipes in such a manner that they prevent water from leaking through the joint. The metal flashing must overlap the material not the other way around.
Typically flashing is installed using roofing nails and roofing cement. Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. This how-to video explores proper roof flashing installation for shingle roofing applications.
Base flashing is installed over underlayment but under siding and shingles so you may not be able to see it from the ground.
The metal flashing must overlap the material not the other way around. Base flashing is installed over underlayment but under siding and shingles so you may not be able to see it from the ground. Ensure it sits flat and extends at least 8 inches above the shingles. Virtually every house in America has at least one vent pipe or other penetration on the roof.