Roof Wall Flashing Techniques

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.

Roof wall flashing techniques. So what do you do when you find yourself needing roof flashing. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.

Two ways to flash roof edges. Step flashing on roof peak. Details concrete masonry roofing wrb flashing. 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.

Do not seal housewrap or building paper to step flashing. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Bend the flap down and nail along the top edge. For deck flashing.

At roof to wall intersections see figure 1. Bend the corner flashing tightly around the corner. All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc. 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.

That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. Roofing cement can dry out and crumble away exposing joints to water. Run the base flashing 4 to 5 in.

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. Click to enlarge make sure the sheathing wrap overlaps all step flashings. Vent flashing done right to prevent leaks back up roof vent boots with flashing counterflashing and proper shingling. 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.

Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require. Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap. Roof shingle over step flashing. Epdm flashing tape with a butyl adhesive backing will help.

It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. Badly corroded flashing will need to be replaced. Beyond the dormer and cut the top section along the dormer edge. Recaulk the joints between the roof and the flashing.

Fasten loose nails and cover exposed nail heads with roofing cement. Knowing the different types as well as the techniques to implement can be helpful. Roof to wall flashing.