How To Flash A Roof To A Vertical Wall

Use flashing cement at joints to help secure flashing.

How to flash a roof to a vertical wall. Above the roof sheathing. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall. This flashing is typically field fabricated from a sheet of 26 ga.

Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it. I cut the tape so that it laps onto the housewrap above and 3 in. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Iws is used in conjunction with step flashing or 4x5 wall flashing to create a water tight junction.

At roof to wall intersections see figure 1. In this video isaac illustrates installation of an 18 w. Once step flashing is installed per each course of shingles in prescribed fashion to integrate roof with an opposing vertical juncture. Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture.

Galvanized sheet metal bent at a 90 degree angle i e. Flashing is installed to surround roof features such as vents chimneys and skylights. Gaf mastering the roof chapter 13 flashing is used to seal and protects joints in a building from water penetration by direct the flow of water away from.