11 Best Of How To Install Metal Roof Valley Flashing New Update 2021. Since the material is usually 8 inches in width the bend should be made to create 2 4-inch sides. Masonry Roofing WRB.
Jan 25 2011 Lay the flashing down in the roof valley and start at the lower end of the roof. Use 1-inch galvanized roofing nails. Roof shingle over step flashing.
Details Concrete.
Apply an approximately 3-inch width of asphalt roofing cement along the sides of flashing and embed shingles in mastic. Remember to caulk the underside of the flashing with a sealant. Place the next flashing panel towards the ridge of the roof overlapping the first panel by about four inches. Shingle the other side of the valley the same way.