Roof To Wall Intersection Flashing

Roof leg and a 7 in.

Roof to wall intersection flashing.

Bigger step flashing is better. 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. Figure 79a flashing the junction step 1. As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints.

That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. 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. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings. Headwall flashing should extend up behind the exterior wall covering and down over the roof covering material as you see here. A headwall is a level junction where a roof meets a wall. 82 build supplement flashings section 4 roof wall intersections figure 79b step 2.

Do not seal housewrap or building paper to step flashing. For deck flashing. All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc. I recommend 12 in wide step flashings bent for a 5 in.

Below is a sketch of what the flashing at roof to wall intersections should look like. This illustration shows proper flashing at a headwall condition. Besides anyone can tell from 2 blocks away that you have a veneer on your walls if. The current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct.

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. Proper roof wall flashing example. Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require. Step 2 flashing 2 covers both the apron flashing upstand and the wall underlay.

At roof to wall intersections see figure 1. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Flashing must be installed at wall and roof intersections and at built in gutters. Yes there will be a little more exposed metal along the rake walls head walls and chimneys but this through the wall z bar flashing will look very nice if pre painted.

The narrower step flashing just isn t wide enough to protect the intersection fully.