How To Flash A Roof Valley

Stop nailing 6 inches from the center.

How to flash a roof valley.

Lay the flashing down in the roof valley and start at the lower end of the roof. One common method is to lay the edge metal under the eaves membrane and over the rake. Shingle the other side of the valley the same way. Two ways to flash roof edges.

Details concrete masonry roofing wrb flashing. Attach the flashing panel in place at the bottom. Fold the top of the flashing over the ridge. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof.

Make sure to cover the gap at the bottom of the raised ridge. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing.

Use 1 inch galvanized roofing nails. Roof one side of the valley running the shingles across it. Cut the bottom edge and fold it down over the drip edge. Step 6 install the flashing.

Remember to caulk the underside of the flashing with a sealant.