Open Valley Roofing

In comparison to a closed valley an open valley adds another layer of lining into the valley.

Open valley roofing.

What is an open valley roof. This leaves a metal strip or line on the surface of the roof that serves as the valley line. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. 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.

Generally flashing is a metal. And either an organic or modified underlayment depending on whether tiles or shingles are being installed. The metal is usually pre painted to best complement the shingles color blend. Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters.

Titan s roofing march 12 2018. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. 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. Looking at your roof and the roofs of your neighbors small details can really make a difference in how your roof function.

Shingle the other side of the valley the same way. In this video we ll flash the valley. Valley flashing options for an open valley installation. When it comes time to replace your roofing system you may be overwhelmed by the different details that make up a roof.

The open valley looks like each plane of the roof was cut in separate and the eye is drawn to the separation. In a previous video we covered how to flash roof edges before shingling. 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. Once the shingles are installed they don t run through the valley area.

If homeowners are looking to have their roof last for many years an open valley is iko s recommended choice and a good up sell opportunity for the roofing professional. Stop nailing 6 inches from the center. After the self adhering underlayment is installed across the valley a pre bent metal valley lining is installed. This valley flashing material can be manufactured from any metal that will resist the effects of weather.

Roofing shingles are installed then cut and sealed where they overlap the metal channel. This video demonstrates the proper installation technique for installing roofing valleys. Open valley vs closed valley. For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck.

The open woven and closed cut methods are demonstrated.