Roofing Up To A Wall

Where a wall is perpendicular to the roofing slip pieces of step flashing under the siding.

Roofing up to a wall.

By code the membrane has to extend inboard of the exterior wall by 2 feet. If the roof meets a wall that is parallel to the shingles roof up to the wall then slip a long continuous piece of flashing under the siding and on. Apply a flashing piece then a shingle then flashing as you would apply step flashing for a chimney. Here is an attempt though maybe not a very good one to make the roof flashing serve also as a through the wall flashing with a tile roof.

All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc. There have always been problems with the flashing details at head walls rake walls and chimneys especially if stucco brick or stone veneer is used. A critical and often overlooked design detail is at the termination of a parapet coping at a wall. Through wall flashing is necessary to redirect moisture that has penetrated the veneer back to the outside.

Step 7 flashing your chimney. Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require. Sometime the through wall flashing can be the same as the counter flashing. Install it through the entire thickness of the brick veneer.

The omittance of the termination metal leaves an opening at the top of the coping and allows for moisture infiltration at the space between the parapet. We ask for 6 inches up the wall. As a rule of thumb we expect to use two courses of membrane if the roof overhang exceeds 8 inches. Step 6 install through wall flashing.

Roof to wall flashing. The most common mistake at this intersection is to allow the metal coping to but up to the wall without the application of termination metal.