Roof To Wall Intersections

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. 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.

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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.

Roof to wall intersections.

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. Yes even flat roof to wall intersections are not being properly done. The metal flashing is formed with a hook edge and cleated on 12 centers. At roof to wall junctions including that there must be.

Flashing joints are lapped 6 in the direction of water flow. The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas. 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. 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.

The sheet acts as a backup at a vulnerable junction. Roof flashing roofing materials roof deck stone veneer home repair rooftop 2d townhouse brick. Tape the top of step ﬂashing with 4 inch wide minimum self adhering modiﬁed bitumen roof tape. Housewrap creates the foundation.

Do not seal housewrap or building paper to step ﬂashing. Use step ﬂashing that has a 2 to 4 inch longer vertical leg than normal. As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints. For deck ﬂashing.

Proper installation of flashing and counter flashing at the intersection of a vertical wall with a roof surface is required to avoid roof leaks. Ideally i like to start by installing a 3 ft. The current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct. At roof to wall intersections see figure 1.

The flashing extends up the wall at least 4.