How To Do Valley On Metal Roof

I have my valley custom made with water trough to help with leaking b.

How to do valley on metal roof.

Apply two beads of roofing cement to attach the top layer shingles to the bottom layer shingles. Make sure that the end of the flashing panel is perfectly in line with the edge of the roof. Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. Use 1 inch galvanized roofing nails.

In roofing a valley is also a low spot that is created when two slopes of a roof meet. Attach the flashing panel in place at the bottom. Fold the top over the roof ridge and cut the bottom along the drip edge metal. With a clean valley you can lay down some peel and stick roofing membrane.

Also apply cement to attach the top layer shingles to each other see steps 5 and 6 in open metal valley above. Use tape sealant between the valley trim and the panel. The top joinery of both valleys when they meet on the same plane of roof is shown here. Install synthetic roofing.

Usually a metal piece of flashing is placed to help form a protective barrier on top of the valley. 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. 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. Lay the flashing down in the roof valley and start at the lower end of the roof.

Best practices for sealing the metal roof valley vary based on the slope of the roof. Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal cutters. Cut each side at the upper end of the valley to conform with the.