Because most roof flashing is required to extend up the wall a minimum of 4 and some a minimum of 5.
How to flash a shed roof to a wall.
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.
One common method is to lay the edge metal under the eaves membrane and over the rake.
It is used for roof to wall flashing.
The base flashing or apron flashing is the bottom piece.
Nail length should penetrate through roof decking.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
It should tuck under the sheathing wrap above and over the flashing below.
Placed opposite to base flashing or above base flashing counter flashing completes the two part team.
Ensure the vent is nailed at each edge 2 in.
The rough side will be down against the roof and wall and nailed at 2 in from ends along the black nail line in the fabric and two nails evenly spaced between them.
The roof flashing is then placed up behind this through the wall z bar flashing on the outside of the vertical blocking backing material.
Above the roof sheathing.
In this video isaac illustrates installation of an 18 w.
Most simply use a nominal 6 piece of lumber.
Details roofing wrb flashing.
Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.
Two ways to flash roof edges.
Flexible flashing tape seals the eave to the wall.
I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall.
Step flashing is a rectangular piece of flashing bent 90 degrees in the center.
Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it.
Vent the shed roof by installing the end wall flashing on top of strips of your wall strapping cut the same height as the vertical leg of the flashing.
I cut the tape so that it laps onto the housewrap above and 3 in.
The flashing only going part way into the wall will merely stop excess water running down the outside of the wall and between the wall and roof.
Above a lower roof where it abuts the wall in all cases make sure to detail the flashing membrane so that it sheds water.
Iws is used in conjunction with step flashing or 4x5 wall flashing to create a water tight junction.
Nail the vent to the wall with matching spacing of nails.
Above this install a counter flashing back on your sheathing with a return wide enough to allow air movement.
