Roof To Wall Intersection Flashing

This illustration shows proper flashing at a headwall condition.

Roof to wall intersection flashing.

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. Headwall flashing should extend up behind the exterior wall covering and down over the roof covering material as you see here. All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc. Step 2 flashing 2 covers both the apron flashing upstand and the wall underlay.

That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. For deck flashing. Roof leg and a 7 in. Roof to wall flashing.

Below is a sketch of what the flashing at roof to wall intersections should look like. 82 build supplement flashings section 4 roof wall intersections figure 79b step 2. Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings.

Figure 79a flashing the junction step 1. Besides anyone can tell from 2 blocks away that you have a veneer on your walls if. Bigger step flashing is better. 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.

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 current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct. A headwall is a level junction where a roof meets a wall. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require. As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints. 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. 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. I recommend 12 in wide step flashings bent for a 5 in. Proper roof wall flashing example. Self adhered flashing must comply with aama 711.

Flashing must be installed at wall and roof intersections and at built in gutters. 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.