Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer.
Lower roof flashing detail.
The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.
Above a lower roof where it abuts the wall in all cases make sure to detail the flashing membrane so that it sheds water.
Ct 07 concrete or masonry wall base flashing with a 5 course flashing system.
It should tuck under the sheathing wrap above and over the flashing below.
If installed along the foundation the membrane should cover the joint where the sill meets the foundation.
The cap flashing is set in the mortar joint between bricks.
These systems rely on overlapping elements roofing felts shingles tiles and flashing details to redirect the rainfall.
This detail shows the use of copper cap flashing extending over copper base flashing at the intersection of a shed roof with a masonry wall.
If the lower roof abutting the building sidewall is being installed before the building s final wall siding and water membrane are being installed the building membrane roofing felt on the wall or final building siding may be able to serve as counter flashing atop the step flashing.
A comprehensive roofing specification writing tool allowing users to quickly write accurate steep and low slope roofing specifications for job submittal packages.
The flashing extends up the wall at least 4.
Rain should run off the roof and into the gutter.
The lower edge is hemmed and laps the base flashing and is formed to be a snug fit against the base flashing.
Both the wall flashing and roof flashing should be fully adhered to the wall substrate.
Before installing the flashing bring the shingles up to the vent pipe.
Roofing cad details and other resources.
Then cut a hole in the shingle that will.
Flashing is installed to surround roof features such as vents chimneys and skylights.
Flashing joints are lapped 6 in the direction of water flow.
Step flashing protects the gap where roofs meet walls by weaving into the roof shingles.
At the bottom of the roof water needs to be directed.
Apply the wall flashing over the roof flashing and termination bar.
Fasten the wall flashing at the top of the wall every 6 inches on center.
However in low slope roofing systems it is easier for water to accumulate.
The metal flashing is formed with a hook edge and cleated on 12 centers.
