How To Flash A Roof To A Vertical Wall

Flashing is installed to surround roof features such as vents chimneys and skylights.

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. I use a wide piece of flexible flashing tape to protect the area between the subfascia and the wall. In this video isaac illustrates installation of an 18 w.

This flashing is typically field fabricated from a sheet of 26 ga. I cut the tape so that it laps onto the housewrap above and 3 in. Use step flashing that has a 2 to 4 inch longer vertical leg than normal. Iws is used in conjunction with step flashing or 4x5 wall flashing to create a water tight junction.

Tape the top of step flashing with 4 inch wide minimum self adhering modified bitumen roof tape. Once the flexible flashing is set i apply a piece of housewrap along the wall where the fascia meets it. 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. Galvanized sheet metal bent at a 90 degree angle i e.

Above the roof sheathing. Flexible flashing tape seals the eave to the wall. Bent into an l shape.