How To Flash A Roof To A Vertical Wall

Use step flashing that has a 2 to 4 inch longer vertical leg than normal.

How to flash a roof to a vertical wall.

Use flashing cement at joints to help secure flashing. 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. Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it. Galvanized sheet metal bent at a 90 degree angle i e.

Above the roof sheathing. At roof to wall intersections see figure 1. I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall. Iws is used in conjunction with step flashing or 4x5 wall flashing to create a water tight junction.

In this video isaac illustrates installation of an 18 w. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture. Bent into an l shape.

Flexible flashing tape seals the eave to the wall. Once step flashing is installed per each course of shingles in prescribed fashion to integrate roof with an opposing vertical juncture. 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.