How To Flash A Roof Valley

Now nail this first flashing at both its far ends.

How to flash a roof valley.

Stop nailing 6 inches from the center. Make sure to cover the gap at the bottom of the raised ridge. One common method is to lay the edge metal under the eaves membrane and over the rake. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof.

Attach the flashing panel in place at the bottom. Lay the flashing down in the roof valley and start at the lower end of the roof. Cut the bottom edge and fold it down over the drip edge. Step 6 install the flashing.

Use 1 inch galvanized roofing nails. Remember to caulk the underside of the flashing with a sealant. Details concrete masonry roofing wrb flashing. Two ways to flash roof edges.

Roof one side of the valley running the shingles across it. Protect the eave from ice dams and sideways rain step one in steep slope roofing is the edge flashing. 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. Fold the top of the flashing over the ridge.

Shingle the other side of the valley the same way.