Roof Wall Flashing Techniques

Vent flashing done right to prevent leaks back up roof vent boots with flashing counterflashing and proper shingling.

Roof wall flashing techniques.

So what do you do when you find yourself needing roof flashing. Recaulk the joints between the roof and the flashing. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. That lip is then set into a reglet or groove in this case cut into the mortar joint of the brick wall above.

Click to enlarge make sure the sheathing wrap overlaps all step flashings. 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. Roof shingle over step flashing. Epdm flashing tape with a butyl adhesive backing will help.

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. Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. 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. At roof to wall intersections see figure 1.

Renew flashing seals by chipping out old caulking and mortar along the edges of the flashing. 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. All exterior wall coverings whether it is wood siding vinyl siding brick or stone veneer stucco etc. Where snow buildup is likely add a wide band of peel and stick membrane lapped over the step flashing but under the sheathing wrap.

Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Details concrete masonry roofing wrb flashing. For deck flashing. Bend the corner flashing tightly around the corner.

Fasten loose nails and cover exposed nail heads with roofing cement. One common method is to lay the edge metal under the eaves membrane and over the rake. 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. Do not seal housewrap or building paper to step flashing.

It s much easier to reseal the flashing than it is to patch a water stained wall or ceiling. Run the base flashing 4 to 5 in. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Roofing cement can dry out and crumble away exposing joints to water.

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. Roof to wall flashing. Badly corroded flashing will need to be replaced. Step flashing on roof peak.

Knowing the different types as well as the techniques to implement can be helpful. Two ways to flash roof edges. Must be kept up off the surface of the roof a minimum 1 some manufacturers of exterior wall coverings require.