Proper Roof Flashing

Some key points to remember.

Proper roof flashing.

Although roof flashing is occasionally fabricated from plastic roofing felt or rubber it is usually made of rust resistant metal galvanized steel aluminum or copper. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Proper flashing around a chimney includes two layers. One common method is to lay the edge metal under the eaves membrane and over the rake.

Then install a non corrosive metal valley flashing of 24 minimum width lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Step flashing can be made with aluminum copper lead galvanized steel or stainless steel but most commonly it is aluminum or copper. These are the key types of roof flashing you need to understand. Two ways to flash roof edges.

Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. And more often than not the culprit is the flashing the sheet metal that keeps the intersection between the chimney and roof watertight. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way. Install an underlayment centered in the roof valley.

Some roof features such as chimneys require two pieces of flashing. Recaulk the joints between the roof and the flashing. Step flashing should always be used where the roof deck meets a sidewall. Galvanized sheet metal is most common but aluminum and copper find occasional use in specialty situations.

Pieces of step flashing are bent at an angle. Base flashing is the solution for front walls. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Continuous flashing is also called apron flashing because it acts a lot like an apron.

Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. Small l shape flashing pieces must be woven into the. This ensures that rain always. Recommended procedures of basic valley flashing installation.

Proper roof wall flashing example to install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. Base flashing is one length of flashing that is bent along the length. Step flashing step flashing redirects the water back onto the shingle.

Fasten loose nails and cover exposed nail heads with roofing cement. Details concrete masonry roofing wrb flashing.