Roof To Wall Intersection Flashing

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.

Roof to wall intersection flashing.

Headwall flashing should extend up behind the exterior wall covering and down over the roof covering material as you see here. 82 build supplement flashings section 4 roof wall intersections figure 79b step 2. Flashing is required at wall and roof intersections and to divert water away from where the eave of a sloped roof intersects a vertical sidewall. Chapter 9 roof assemblies section r903 2.

That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Step 2 flashing 2 covers both the apron flashing upstand and the wall underlay. Flashing must be installed at wall and roof intersections and at built in gutters. Roof leg and a 7 in.

As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints. At roof to wall intersections see figure 1. Proper roof wall flashing example. 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.

Use step flashing that has a 2 to 4 inch longer vertical leg than normal. The narrower step flashing just isn t wide enough to protect the intersection fully. Below is a sketch of what the flashing at roof to wall intersections should look like. Roof to wall flashing.

Figure 79a flashing the junction step 1. The current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.

I recommend 12 in wide step flashings bent for a 5 in. A headwall is a level junction where a roof meets a wall. For deck flashing. Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings.

Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require. We describe the different flashing materials that can be used how and where flashing should be installed at various building wall intersections and corners at the intersection of a roof and building wall at other locations and how to seal these locations against leaks or insect damage. All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc. Do not seal housewrap or building paper to step flashing.

Self adhered flashing must comply with aama 711. Besides anyone can tell from 2 blocks away that you have a veneer on your walls if.