Open Valley Roof Addition

First clean the debris out of the valley including sawdust nails and whatever else is in there.

Open valley roof addition.

Roofing shingles are installed then cut and sealed where they overlap the metal channel. Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss. Roof one side of the valley running the shingles across it. This allows water to fall from the higher slope to the lower slope and prevents it from going under the shingles to the roof deck.

Shingle the other side of the valley the same way. Stop nailing 6 inches from the center. The metal is usually pre painted to best complement the shingles color blend. There are two common methods for completing the flashing of a valley in a shingle roof system.

Closed valleys or open valleys. In this video we ll flash the valley. Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. After the underlayment is placed a pre bent metal valley lining is installed.

Some homeowners do not like the look of open valleys while others feel the metal accentuates the roof s shape particularly if copper or painted flashing. In addition there are recognized options for open and closed cut valleys commonly referred to as california open valleys and california closed cut valleys open valley. Also different architectural styles will use the same type of roof. The three basic valley types for asphalt shingle roof systems are woven open and closed cut.

Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Open valley shingle installation. One of the details that varies between homes is the method of flashing the valley areas of the roof.

In a previous video we covered how to flash roof edges before shingling. An open valley relies on metal flashing for protection. This metal lining can be made of any. To understand what makes a valley either closed or open it is important to understand how a valley is constructed.