How To Flash A Flat Roof To A Vertical Wall

Use flashing cement at joints to help secure flashing.

How to flash a flat roof to a vertical wall.

Gravel stop flashing helps protect the fascia from water damage just like the drip edge. Two ways to flash roof edges. Step flashing on roof peak. The gravel stop prevents material on the roof from falling off and also serves as a shield to protect the roof from damage.

I fold a piece of metal flashing for the inside corner between the subfascia and the wall. Details concrete masonry roofing wrb flashing. Long helps it to fold onto the roof sheathing. When fitting cover flashings to a flat roof like the one pictured bottom right there is no need for the third covering angle of lead the lead is simply cut just above the flat roof to stop capillary action and the flashing cutting into the flat roof itself.

The roof flashing is then placed up behind this through the wall z bar flashing on the outside of the vertical blocking backing material. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. I then add a second piece of flexible flashing tape to cover the open corner of the metal flashing and i fold it down onto the subfascia. Roof shingle over step flashing.

Most simply use a nominal 6 piece of lumber. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. At roof to wall intersections see figure 1. A vertical cut about 2 in.

Strips of the roofing material itself are sometimes installed before the membrane attached to the roof perimeter and the vertical surface. Fastening strips or termination bars may be used to pinch the membrane down to the roof deck or into the bottom of the wall before the base and counter flashings are installed. 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. One common method is to lay the edge metal under the eaves membrane and over the rake.

That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. The exterior wall covering material is then kept off the surface of the roof. And when the flat roof is below the sloped one flashing is applied on the flat one and extend upwards to the slope.