Roof To Wall Intersections

Bigger step flashing is better.

Roof to wall intersections.

Use step flashing that has a 2 to 4 inch longer vertical leg than normal. For deck flashing. Places where roofs and walls intersect are very common. The flat roofing material must go up the wall a minimum of 12 or up the wall and over the top of the wall if the wall is less than 12 high.

Schauffele division 7 solutions inc. A headwall is a level junction where a roof meets a wall. The narrower step flashing just isn t wide enough to protect the intersection fully. I recommend 12 in wide step flashings bent for a 5 in.

Roof leg and a 7 in. Roof wall flashing detail specifications snafus. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. This illustration shows proper flashing at a headwall condition.

Finally the housewrap can be laid up on the wall to cover the top of the kickout diverter and step flashings. Do not seal housewrap or building paper to step flashing. They re called headwalls and sidewalls. 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. 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. Certified air barrier specialist 007007 roy f. The most common roof to wall intersections involve either a gable roof with its ridge running perpendicular to the wall or a shed roof that slopes downward away from the wall.

76 build supplement flashings section 4 roof wall intersections roof wall intersections section 4. Roof wall intersections presented by fcsi ccpr fabaa leed green assoc. Credit s earned on completion of this course will be reported to aia ces for aia members. At roof to wall intersections see figure 1.

This article illustrates and discusses alternate or rather goofy attempts at roof wall intersection flashing to prevent leaks water damage and points out where leak risks may remain.