Roofing W Valley Flashing

Take care not to place any fasteners in the exposed center area of the metal flashing.

Roofing w valley flashing.

Cut the top layer of shingles along the chalkline. Overview w valley flashing protects the critical area of your roof where two slopes come together to form a valley. Step 9 cut corners and apply cement. Fold the top over the roof ridge and cut the bottom along the drip edge metal.

Be sure to check local building codes to ensure you have the proper width for your application. When properly installed w valley flashing will reliably channel run off water down the roof and into the gutter. First clean the debris out of the valley including sawdust nails and whatever else is in there. Nrca lile recommends that roof valley flashing metal for open roof valleys should be 26 gauge 0 45mm galvanized steel or equivalent noncorrosive nonstaining metal.

With a clean valley you can lay down some peel and stick roofing membrane. Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. Lile points out that valleys lined with roll roofing are not as durable. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.