Open Valley Roofing

The open woven and closed cut methods are demonstrated.

Open valley roofing.

After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. In a previous video we covered how to flash roof edges before shingling. This roof is on a small cabin in the back of beyond and the only valleys will be on 3 small dormers with about 6 feet of valley per side so i m not sure the water will wear out the valley shingles argument will work. The open valley looks like each plane of the roof was cut in separate and the eye is drawn to the separation.

This valley flashing material can be manufactured from any metal that will resist the effects of weather. Valley flashing options for an open valley installation. A roof using the open valley style involves placing a v or w shaped piece of metal usually galvanized or sometimes copper in the seam of the valley and then covered with a base sheet such as 30lb. Stop nailing 6 inches from the center.

Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters. This leaves a metal strip or line on the surface of the roof that serves as the valley line. If you are installing an open valley you will need to select a flashing material. This video demonstrates the proper installation technique for installing roofing valleys.

What is an open valley roof. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. In comparison to a closed valley an open valley adds another layer of lining into the valley.

First clean the debris out of the valley including sawdust nails and whatever else is in there. Once the shingles are installed they don t run through the valley area. In this video we ll flash the valley. Open valley vs closed valley.

Looking at your roof and the roofs of your neighbors small details can really make a difference in how your roof function. When it comes time to replace your roofing system you may be overwhelmed by the different details that make up a roof. Roof one side of the valley running the shingles across it. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.

This is almost the same as the closed roof valley method except a pre bent metal valley lining is installed instead of a secondary roof underlayment. And either an organic or modified underlayment depending on whether tiles or shingles are being installed. Generally flashing is a metal. Titan s roofing march 12 2018.

The metal is usually pre painted to best complement the shingles color blend.