Roofing Dormer Valley Flashing

Lay a bead of roofing cement along the shingles just below the dormer and bed the metal base flashing into it.

Roofing dormer valley flashing.

Overview w valley flashing protects the critical area of your roof where two slopes come together to form a valley. Valley flashing band in black model dl600n 125 00 box 125 00. Fold the top over the roof ridge and cut the bottom along the drip edge metal. From drip edge to valley flashing december 25 2018 drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies.

Dormer flashing 1 drip edge 10 eave flashing 8 flat shingle 1 gable flashing 7 metal sheets 1. Ideally this custom flashing will have soldered corners but if not carefully notch the metal at the dormer corners and wrap the vertical leg around the corner onto the side wall. 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. Take care not to place any fasteners in the exposed center area of the metal flashing.

Be sure to check local building codes to ensure you have the proper width for your application. Open valley shingle installation an open valley relies on metal flashing for protection. Get free shipping on qualified valley flashing roof flashing or buy online pick up in store today in the building materials department. That flashing is left exposed so the roof has visible lines of metal running down the valley.

Apply an approximately 3 inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic clip the top corner of shingles along valleys to keep water flow toward center of valley. Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing. Lile points out that valleys lined with roll roofing are not as durable.