Roof Wall Flashing Techniques

Step flashing on roof peak.

Roof wall flashing techniques.

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. Roof shingle over step flashing. At roof to wall intersections see figure 1. Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap.

One common method is to lay the edge metal under the eaves membrane and over the rake. For deck 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.

Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. Roof to wall flashing. 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.

Epdm flashing tape with a butyl adhesive backing will help. Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

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. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. 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. Bend the corner flashing tightly around the corner.

It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. 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. Bend the flap down and nail along the top edge. Run the base flashing 4 to 5 in.

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. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Details concrete masonry roofing wrb flashing. Recaulk the joints between the roof and the flashing.

Do not seal housewrap or building paper to step flashing. Click to enlarge make sure the sheathing wrap overlaps all step flashings. There are two good ways to handle corner flashing. Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require.

Badly corroded flashing will need to be replaced. Roofing cement can dry out and crumble away exposing joints to water. All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc.