How To Flash A Roof To A Vertical Wall

Above the roof sheathing.

How to flash a roof to a vertical wall.

Bent into an l shape. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Roof flashing is a thin material usually galvanized steel that professional roofers use to direct water away from critical areas of the roof wherever the roof plane meets a vertical surface like a wall or a dormer. Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

Use flashing cement at joints to help secure flashing. I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall. I cut the tape so that it laps onto the housewrap above and 3 in. Flashing is installed to surround roof features such as vents chimneys and skylights.

Flexible flashing tape seals the eave to the wall. 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. Iws is used in conjunction with step flashing or 4x5 wall flashing to create a water tight junction. 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. Once step flashing is installed per each course of shingles in prescribed fashion to integrate roof with an opposing vertical juncture. At roof to wall intersections see figure 1.