How To Do Valley On Metal Roof

Best practices for sealing the metal roof valley vary based on the slope of the roof.

How to do valley on metal roof.

Cut each side at the upper end of the valley to conform with the. First clean the debris out of the valley including sawdust nails and whatever else is in there. 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. Use tape sealant between the valley trim and the panel.

Attach the flashing panel in place at the bottom. Apply two beads of roofing cement to attach the top layer shingles to the bottom layer shingles. Lay the flashing down in the roof valley and start at the lower end of the 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.

Use 1 inch galvanized roofing nails. With a clean valley you can lay down some peel and stick roofing membrane. Fold the top over the roof ridge and cut the bottom along the drip edge metal. The top joinery of both valleys when they meet on the same plane of roof is shown here.

Use fasteners to attach the panel to the structure making sure that there is complete compression of the sealant. I have my valley custom made with water trough to help with leaking b. How to seal metal roof valley. Also apply cement to attach the top layer shingles to each other see steps 5 and 6 in open metal valley above.

Cut corners and apply cement dub cut the top layer shingles see step 4 in open metal valley above. Usually a metal piece of flashing is placed to help form a protective barrier on top of the valley. Install synthetic roofing.