How To Replace A Valley On A Roof

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

How to replace a valley on a roof.

Cut each side of the flashing at the lower end to conform with the corresponding edges of the roof using sheet metal. Here s how to install new flashing in your roof valleys. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Never try and work on a roof from a ladder as a.

Start at the lower end of the valley. Shingle the other side of the valley the same way. A scaffold tower has been used for access in this video. Stop nailing 6 inches from the center.

Use a metal cutter to alter the length of the flashing to ensure it lines up with your roof s lower edges. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. Begin by placing the replacement piece of flashing in the valley lining up the groove in the center with the middle of.

If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof. The top joinery of both valleys when they meet on the same plane of roof is shown here.