How To Flash A Flat Roof To A Vertical Wall

That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.

How to flash a flat roof to a vertical wall.

A vertical cut about 2 in. At roof to wall intersections see figure 1. Bend the corner flashing tightly around the corner. Use flashing cement at joints to help secure flashing.

Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. The gravel stop prevents material on the roof from falling off and also serves as a shield to protect the roof from damage. The exterior wall covering material is then kept off the surface of the roof. Two ways to flash roof edges.

Strips of the roofing material itself are sometimes installed before the membrane attached to the roof perimeter and the vertical surface. Details concrete masonry roofing wrb flashing. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. And when the flat roof is below the sloped one flashing is applied on the flat one and extend upwards to the slope.

Long helps it to fold onto the roof sheathing. Gravel stop flashing helps protect the fascia from water damage just like the drip edge. If you do not wish to form your own corner flashing you can buy pre bent pieces and cut them to size or use a piece of corrugated aluminum which is easier to bend. Most simply use a nominal 6 piece of lumber.

Roof shingle over step flashing. I fold a piece of metal flashing for the inside corner between the subfascia and the wall. 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. When the flat roof as on a more elevated position compared to the sloped roof the flashing of the sloped roof extends onto the flat one. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. The roof flashing is then placed up behind this through the wall z bar flashing on the outside of the vertical blocking backing material.