How To Replace Roof Valley Flashing

Recommended procedures of basic valley flashing installation.

How to replace roof valley flashing.

Lap successive sheets of metal flashing a minimum of 12 inches and seal laps. Pry and lift off the flashing. Then install a non corrosive metal valley flashing of 24 minimum width. 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.

Fold the top of the flashing over the ridge. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. To splice the pieces add roofing cement to the lower piece and install the upper piece with at least a six inch. Position a new vent pipe flashing over the vent push it down into place and nail where shingles will cover it.

Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal. How to do it. Start at the lower end of the valley. Pull or cut off any nails.

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 replace flashing around the vent pipe first remove the shingles covering the flange at the back and sides. Install an underlayment centered in the roof valley. Make sure to cover the gap at the bottom of the raised ridge.

Do not drive nails into the flashing. Place the new piece of sheet metal valley flashing in the valley with the raised center aligned with the center of. Apply an approximately 3 inch.