Metal Roof Dormer Flashing Details

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Metal roof dormer flashing details.

Flashing is installed to surround roof features such as vents chimneys and skylights. Roof flashing is critical to keeping a house dry but people often get it wrong. Dealing with dips and making clean overlaps metal drip edge flashing is installed on the perimeter of a roof to direct water away from the fascia into the gutters and to keep wind blown rain. In this article veteran remodeler mike guertin shows how to flash a dormer with bombproof details.

Lay a bead of roofing cement along the top of the shingle course just below the dormer and bed the base flashing into it. 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. In our case we are working with a snap lock standing seam roofing system with concealed fasteners. Once the gable flashing is set in place we can install our first vertical sheet metal panel that comprises standing seam system.

The first piece of step flashing should turn the corner and extend over the base flashing. There are several reasons for it. The gable flashing gets installed along the gable rake in the similar way to starter flashing. Drip edge installation on an existing roof.

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