The horizontal part of the flashing will vary depending on the type of roof covering material.
Flashing between roof and wall.
Flexible flashing tape seals the eave to the wall.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
Damaged or improperly installed roof flashing especially around the chimney or dormer is one of the most common causes of roof leaks.
If there were no flashing against these walls water could slowly drip into the crevice between the wall and the roof and potentially into the home.
I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall.
Proper roof wall flashing example.
Above the roof sheathing.
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.
Except where walls are brick the vertical part of the sidewall flashing should extend up behind the exterior wall covering just like with headwalls.
Drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies this collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs.
Step flashing installed as each course of shingles is installed involves placing an individual piece of metal flashing bent at a right angle against the building wall extending up the wall 4 and onto the roof a minimum of 2 4 is preferable.
