Flashing A Roof Wall Intersection

Self adhered flashing must comply with aama 711.

Flashing a roof wall intersection.

Where we provide more details about the right way to install flashing at the roof to wall intersection. 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. Step 2 flashing 2 covers both the apron flashing upstand and the wall underlay.

Bigger step flashing is better. The sketch shown here courtesy of steve bliss and j wiley sons is discussed in detail. Flashing must be installed at wall and roof intersections and at built in gutters. 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. Inspect the wall and roof framing to assess existing conditions and develop specific detailing for flashing the intersection of the wall and roof. Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings. I recommend 12 in wide step flashings bent for a 5 in.

At wall flashing details. If there is no metal flashing installed at the wall roof intersection or if the existing flashing is damaged improperly installed or allowing water to damage the wall remove the siding and any existing flashing to expose at least 8 inches of the. Counter flashing let into the brick mortar joints sealed the top of roof wall flashing that you can t see.

Roof leg and a 7 in. The narrower step flashing just isn t wide enough to protect the intersection fully. And in our experience when a single piece of flashing extends only a few inches under the shingles especially on a long roof slope and worse on a roof that happens to slope slightly towards rather than away from the abutting vertical building wall the accumulated roof drainage water near the bottom end of the roof wall intersection will overwhelm the width of the flashing and because it. Headwall flashing should extend up behind the exterior wall covering and down over the roof covering material as you see here.

The current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct. Chapter 9 roof assemblies section r903 2. As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints. The current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct.

Roof to wall intersections.