Roofing Dormer Valley Flashing

Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.

Roofing dormer valley flashing.

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. Be sure to check local building codes to ensure you have the proper width for your application. Take care not to place any fasteners in the exposed center area of the metal flashing. 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.

Dormer flashing 1 drip edge 10 eave flashing 8 flat shingle 1 gable flashing 7 metal sheets 1. Overview w valley flashing protects the critical area of your roof where two slopes come together to form a valley. Get free shipping on qualified valley flashing roof flashing or buy online pick up in store today in the building materials department. With a clean valley you can lay down some peel and stick roofing membrane.

That flashing is left exposed so the roof has visible lines of metal running down the valley. Open valley shingle installation an open valley relies on metal flashing for protection. Lay a bead of roofing cement along the shingles just below the dormer and bed the metal base flashing into it. Some homeowners do not like the look of open valleys while others feel the metal accentuates the roof s shape particularly if copper or painted flashing is used.

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. 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.