How To Flash A Roof Valley

Attach the flashing panel in place at the bottom.

How to flash a roof valley. Use 1 inch galvanized roofing nails. Remember to caulk the underside of the flashing with a sealant. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Make sure to cover the gap at the bottom of the raised ridge.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Stop nailing 6 inches from the center. 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.

Now nail this first flashing at both its far ends. Cut the bottom edge and fold it down over the drip edge. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. Two ways to flash roof edges.

Fold the top of the flashing over the ridge. 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. Details concrete masonry roofing wrb flashing.

Step 6 install the flashing.