How To Flash A Roof To A Vertical Wall

At roof to wall intersections see figure 1.

How to flash a roof to a vertical wall. Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Bent into an l shape. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Flashing is installed to surround roof features such as vents chimneys and skylights.

Above the roof sheathing. Use flashing cement at joints to help secure flashing. 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. 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.

I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall. Once step flashing is installed per each course of shingles in prescribed fashion to integrate roof with an opposing vertical juncture. In this video isaac illustrates installation of an 18 w. Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it.

This flashing is typically field fabricated from a sheet of 26 ga. Galvanized sheet metal bent at a 90 degree angle i e. Flexible flashing tape seals the eave to the wall.