Roof To Wall Intersection Flashing

Step 2 flashing 2 covers both the apron flashing upstand and the wall underlay.

Roof to wall intersection flashing.

Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require. Proper roof wall flashing example. This illustration shows proper flashing at a headwall condition. 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.

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. Roof to wall flashing. Headwall flashing should extend up behind the exterior wall covering and down over the roof covering material as you see here. As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints.

Figure 79a flashing the junction step 1. Below is a sketch of what the flashing at roof to wall intersections should look like. Bigger step flashing is better. Besides anyone can tell from 2 blocks away that you have a veneer on your walls if.

Roof leg and a 7 in. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. The narrower step flashing just isn t wide enough to protect the intersection fully. 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. At roof to wall intersections see figure 1. 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. 82 build supplement flashings section 4 roof wall intersections figure 79b step 2.

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. Chapter 9 roof assemblies section r903 2. For deck flashing. Self adhered flashing must comply with aama 711.

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. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

I recommend 12 in wide step flashings bent for a 5 in. Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings.