How To Do Valley On Metal Roof

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 this collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs.

How to do valley on metal roof.

Usually a metal piece of flashing is placed to help form a protective barrier on top of the valley. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. In roofing a valley is also a low spot that is created when two slopes of a roof meet. Also apply cement to attach the top layer shingles to each other see steps 5 and 6 in open metal valley above.

Install synthetic roofing. How to seal metal roof valley. Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters. Use tape sealant between the valley trim and the panel.

Best practices for sealing the metal roof valley vary based on the slope of the roof. Use 1 inch galvanized roofing nails. The top joinery of both valleys when they meet on the same plane of roof is shown here. However a valley is still a common place to find roof leaks because once the flashing is damaged say by a hail storm for example water can easily penetrate.

Apply two beads of roofing cement to attach the top layer shingles to the bottom layer shingles. Cut each side at the upper end of the valley to conform with the. Cut corners and apply cement dub cut the top layer shingles see step 4 in open metal valley above. I have my valley custom made with water trough to help with leaking b.

Lay the flashing down in the roof valley and start at the lower end of the roof. Fold the top over the roof ridge and cut the bottom along the drip edge metal. First clean the debris out of the valley including sawdust nails and whatever else is in there.