How To Valley A Roof

Water collects in a valley to flow off the roof.

How to valley a roof.

Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys. Roof installation how to shingle a valley hd by roofrepair101 more about roofing at. 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.

A roof valley is formed where two roof slopes meet. A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water. Valleys are a prime leak area so it s important to be careful. Shingle the other side of the valley the same way.

Roof one side of the valley running the shingles across it. Stop nailing 6 inches from the center. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. For a closed valley the roofer will install the shingles onto the roof deck and extend the asphalt shingles through the area where opposing roof planes meet so that the shingles cover or close the valley area.

To understand the concept and how all the pieces are laid out and cut i picture the roof two dimensionally in plan view. I then move the shingle to the uppermost course on the roof plane line up the mark on the shingle with the valley center and again mark the corner. Essentially there are three main ways to shingle a roof valley. This roof valley is a perfect example.

Then i use a construction calculator to find the correct length of each rafter. To shingle out of the valley with laminated shingles lay a shingle down as a gauge and mark the corner at the bottom left and top right of the roof. Soup to nuts riley shows the proper way of installing a valley on a roof. The open woven and closed cut methods are demonstrated.

To get started i need to know only two things.