Flashing A Roof Wall Intersection

Figure 79a flashing the junction step 1.

Flashing a roof wall intersection.

As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints. Flashing must be installed at wall and roof intersections and at built in gutters. Roof to wall intersections. 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.

As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints. A headwall is a level junction where a roof meets a wall. This illustration shows proper flashing at a headwall condition. Bigger step flashing is better.

82 build supplement flashings section 4 roof wall intersections figure 79b step 2. Roof leg and a 7 in. Counter flashing let into the brick mortar joints sealed the top of roof wall flashing that you can t see. Where we provide more details about the right way to install flashing at the roof to wall intersection.

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

Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings. Step 2 flashing 2 covers both the apron flashing upstand and the wall underlay. The sketch shown here courtesy of steve bliss and j wiley sons is discussed in detail. Headwall flashing should extend up behind the exterior wall covering and down over the roof covering material as you see here.

Inspect the wall and roof framing to assess existing conditions and develop specific detailing for flashing the intersection of the wall and roof. I recommend 12 in wide step flashings bent for a 5 in. 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. At wall flashing details.

The current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct.