How To Replace Roof Valley Flashing

Pull or cut off any nails.

How to replace roof valley flashing.

A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. Make sure to cover the gap at the bottom of the raised ridge. How to do it. Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal.

Fold the top of the flashing over the ridge. Install an underlayment centered in the roof valley. Pry and lift off the flashing. Start at the lower end of the valley.

Position a new vent pipe flashing over the vent push it down into place and nail where shingles will cover it. Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Apply an approximately 3 inch. Place the new piece of sheet metal valley flashing in the valley with the raised center aligned with the center of.

Caulk any openings left and made by the flashing process with a suitable sealant then dust the flashing once it is dry and paint over with granule paint available at hardware stores of your desire. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. With underlayment and flashing installed apply shingles up to one side of the flashing. Now ask a family member to stand inside the house under the roof valley and then standing on the roof pour a bucket of water onto your handiwork.

Recommended procedures of basic valley flashing installation. If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof. Then install a non corrosive metal valley flashing of 24 minimum width.