Roof Wall Flashing Techniques

Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.

Roof wall flashing techniques.

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. There are two good ways to handle corner flashing. Step flashing on roof peak. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.

Beyond the dormer and cut the top section along the dormer edge. Recaulk the joints between the roof and the flashing. It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. Click to enlarge make sure the sheathing wrap overlaps all step flashings.

So what do you do when you find yourself needing roof flashing. Two ways to flash roof edges. Epdm flashing tape with a butyl adhesive backing will help. Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap.

Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require. Bend the corner flashing tightly around the corner. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape.

For deck flashing. All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc. Do not seal housewrap or building paper to step flashing. Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration.

Knowing the different types as well as the techniques to implement can be helpful. Fasten loose nails and cover exposed nail heads with roofing cement. Roof to wall flashing. One common method is to lay the edge metal under the eaves membrane and over the rake.

The first bending two pieces and caulking the joint photos 1 3 is the most common because you can do it on the spot with the flashing at hand. There have always been problems with the flashing details at head walls rake walls and chimneys especially if stucco brick or stone veneer is used. Roofing cement can dry out and crumble away exposing joints to water. Roof shingle over step flashing.

Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Run the base flashing 4 to 5 in. Vent flashing done right to prevent leaks back up roof vent boots with flashing counterflashing and proper shingling. Details concrete masonry roofing wrb flashing.

Bend the flap down and nail along the top edge. Waterproof your windows with liquid flashing learn how to install liquid applied flashing to seal the rough opening while leaving a path for water to escape. Without the roof flashing against those walls water would slowly drip into the space between the roof and wall and even potentially into the home.