How To Flash A Roof Valley

Use 1 inch galvanized roofing nails.

How to flash a roof valley.

Fold the top of the flashing over the ridge. Install valley battens on both ends of the roof valley then attach first flashing 3 4 inches over the roof flange and another 3 4 inches over the fascia if any is present. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. Step 6 install the flashing.

Cut the bottom edge and fold it down over the drip edge. Stop nailing 6 inches from the center. One common method is to lay the edge metal under the eaves membrane and over the rake. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.

Details concrete masonry roofing wrb flashing. Make sure to cover the gap at the bottom of the raised ridge. Remember to caulk the underside of the flashing with a sealant. Two ways to flash roof edges.

To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Lay the flashing down in the roof valley and start at the lower end of the roof. Attach the flashing panel in place at the bottom. Shingle the other side of the valley the same way.

Roof one side of the valley running the shingles across it.