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.
Roof to wall intersections.
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.
The flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas.
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.
Yes even flat roof to wall intersections are not being properly done.
At roof to wall junctions including that there must be.
Ideally i like to start by installing a 3 ft.
The flashing extends up the wall at least 4.
Do not seal housewrap or building paper to step flashing.
As a result most typical construction does not use any type of through the wall flashing which results in leaky wall complaints.
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 current flashing details in the 2013 international residential code irc for sloped roof wall intersections are very difficult to construct.
Roof flashing roofing materials roof deck stone veneer home repair rooftop 2d townhouse brick.
Use step flashing that has a 2 to 4 inch longer vertical leg than normal.
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.
At roof to wall intersections see figure 1.
The sheet acts as a backup at a vulnerable junction.
For deck flashing.
Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
Proper installation of flashing and counter flashing at the intersection of a vertical wall with a roof surface is required to avoid roof leaks.
The metal flashing is formed with a hook edge and cleated on 12 centers.
