Roof To Wall Intersections

Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.

Roof to wall intersections.

Do not seal housewrap or building paper to step flashing. The flashing extends up the wall at least 4. The current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct. Yes even flat roof to wall intersections are not being properly done.

There have always been problems with the flashing details at the roof to wall intersections of head walls rake walls and chimneys especially if brick or stone veneer or stucco is used. Sheet of housewrap or even better a piece of self adhering roof underlayment to the wall before the first truss or roof rafter is placed against it. Roof flashing roofing materials roof deck stone veneer home repair rooftop 2d townhouse brick. Housewrap creates the foundation.

A 75 mm minimum wall cladding cover over the upstand a 35 mm minimum gap between the wall cladding and the roofing cover over the roofing as per e2 as1 table 7 depending on wind zone and roof pitch wall underlay lapped over roof underlay upturn upturn to eave flashing 4 1 1 1. As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints. Flashing joints are lapped 6 in the direction of water flow. For deck flashing.

Ideally i like to start by installing a 3 ft. The metal flashing is formed with a hook edge and cleated on 12 centers. 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. The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.

At roof to wall intersections see figure 1. The sheet acts as a backup at a vulnerable junction. Roof to wall connection some general guidance roof are different than walls all materials are vapor impermeable vapor control layer is located on exterior side of insulation issue is climate dependent interior vapor barrier and a roof system that has the air and vapor control layer on the exposed side can result in a sandwhich for moisture. Proper installation of flashing and counter flashing at the intersection of a vertical wall with a roof surface is required to avoid roof leaks.

Our page top photograph illustrates a successful installation of flashing and counter flashing along intersection of a roof surface with the side of a brick constructed dormer.