Headwall Flashing With Siding

Galvanized sheet metal bent at a 90 degree angle i e.

Headwall flashing with siding.

Unless already installed a water resistive barrier should be applied to the house prior to installing vinyl siding. Refer to important notes for more information on water resistive barriers. This flashing is typically field fabricated from a sheet of 26 ga. Consult your local building code for requirements in your geographic area.

Install flashing before starting to apply the siding. Flashing this area of a roof correctly is very important to avoid leaks. A headwall is defined by the junction between a sloped roof and a wall. The headwall flashing in the 2nd pic however seems like it s not going to work since it is outside the siding and it doesn t appear there is any sealant at the top of it.

The metal flashing is formed with a hook edge and cleated on 12 centers. Posted march 4 2017 filed under roof installation roof repair maintenance. The flashing extends up the wall at least 4 the flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas. On metal roofing systems a headwall flashing is designed to hook on the j channel or z channel and extend up behind the wall exterior while in shingle and slate roof the headwall sits on the first.

Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture. Flashing against the headwall should be counter flashed a minimum of 2 with house wrap or other flashing and then covered with the finish wall cladding laps in the headwall flashing should be 3 minimum and the overlapping end set in a double bead of sealant. Flashing should overlap the roof covering material but on asphalt shingle roofs for aesthetic reasons the part of the headwall flashing that extends down over asphalt shingles is often covered with a course of shingle tabs. Bent into an l shape.

Don t mistake this condition for headwall flashing routed beneath the shingles and call it a defect. The flashing needs to be installed before installing the roof shingles. This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted. In the last picture you can see they caulked between the wood shingle siding joints suggesting they had water damage inside below that are confirmed by old.