Flat Roof To Wall Flashing Detail

Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer.

Flat roof to wall flashing detail.

No air control in either the roof assembly or the wall assembly. Do not seal housewrap or building paper to step flashing. No vapor control layer and thermal bridging everywhere. Flashing on a wall above a flat roof.

Size up the job. At roof to wall intersections see figure 1. No membrane under the parapet flashing. This video demonstrates where flashing could be leaking from on a brick wall.

Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Flashing is installed to surround roof features such as vents chimneys and skylights. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Because most roof flashing is required to extend up the wall a minimum of 4 and some a minimum of 5.

Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Flat roof flashing this could virtually be any type of flat roof the upstand of the flat roof covering is overlapped by the drop of the flashing. To emphasize the importance of proper roof and deck flashing and to provide typical and enhanced flashing techniques for coastal homes. Most simply use a nominal 6 piece of lumber.

Ideally this should be 150mm or a minimum of 75mm again common sense and exposure applies. This collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs right in the real world. Ah but not in the way you think. See fact sheet nos.

And to make matters worse structurally we also tend to have some issues. To install the roof wall flashing above the builder bent the top edge of the flashing into a 90 degree lip about 2 cm in width. The roof flashing is then placed up behind this through the wall z bar flashing on the outside of the vertical blocking backing material. Think about the thermal stress a roof membrane goes through figures 7 and 8.