7 2 and 7 3 for rake and eave details.
Flat roof to wall flashing detail.
No air control in either the roof assembly or the wall assembly.
Ah but not in the way you think.
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.
Lead flashing maximum length.
Think about the thermal stress a roof membrane goes through figures 7 and 8.
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.
No vapor control layer and thermal bridging everywhere.
Use step flashing that has a 2 to 4 inch longer vertical leg than normal.
The roof flashing is then placed up behind this through the wall z bar flashing on the outside of the vertical blocking backing material.
Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.
And to make matters worse structurally we also tend to have some issues.
Most simply use a nominal 6 piece of lumber.
Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley.
Ideally this should be 150mm or a minimum of 75mm again common sense and exposure applies.
That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.
To emphasize the importance of proper roof and deck flashing and to provide typical and enhanced flashing techniques for coastal homes.
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.
No membrane under the parapet flashing.
Do not seal housewrap or building paper to step flashing.
Flashing is installed to surround roof features such as vents chimneys and skylights.
Size up the job.
At roof to wall intersections see figure 1.
Flashing on a wall above a flat roof.
This video demonstrates where flashing could be leaking from on a brick wall.
