Proper Roof Flashing

Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.

Proper roof flashing.

It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. These are the key types of roof flashing you need to understand. Base flashing is the solution for front walls. Recaulk the joints between the roof and the flashing.

Fasten loose nails and cover exposed nail heads with roofing cement. How to install roof flashing against a wall. 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. Pieces of step flashing are bent at an angle.

Sections of l shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. 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. Two ways to flash roof edges. Galvanized sheet metal is most common but aluminum and copper find occasional use in specialty situations.

One common method is to lay the edge metal under the eaves membrane and over the rake. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. And more often than not the culprit is the flashing the sheet metal that keeps the intersection between the chimney and roof watertight. Some roof features such as chimneys require two pieces of flashing.

Proper flashing around a chimney includes two layers. Small l shape flashing pieces must be woven into the. Continuous flashing is also called apron flashing because it acts a lot like an apron. Install an underlayment centered in the roof valley.

Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Step flashing should always be used where the roof deck meets a sidewall. Step flashing step flashing redirects the water back onto the shingle.

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. Recommended procedures of basic valley flashing installation. Base flashing is one length of flashing that is bent along the length. Some key points to remember.

Step flashing can be made with aluminum copper lead galvanized steel or stainless steel but most commonly it is aluminum or copper. Details concrete masonry roofing wrb flashing.