Open Valley Roof Addition

Again choosing the easy way out we opted to build blind valleys aka california valleys where one.

Open valley roof addition.

For an open valley a sheet of metal usually steel sometimes copper is fastened to the roof deck. That flashing is left exposed so the roof has visible lines of metal running down the valley. Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles. Stop nailing 6 inches from the center.

In a previous video we covered how to flash roof edges before shingling. This metal lining can be made of any. The metal is usually pre painted to best complement the shingles color blend. But the stakes are higher for valleys than they are for gutters in a previous video we covered how to flash.

Roofing shingles are installed then cut and sealed where they overlap the metal channel. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Closed valleys or open valleys. There are two common methods for completing the flashing of a valley in a shingle roof system.

Lay one and two tab shingles as you near the valley so full size shingles will run across the valley. Roof valleys are like gutters with a steep pitch. One of the details that varies between homes is the method of flashing the valley areas of the roof. In this video we ll flash 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. When compared to a closed valley and open valley adds an additional layer of lining. An open valley relies on metal flashing for protection.

Also different architectural styles will use the same type of roof. Roof one side of the valley running the shingles across it. Open valley shingle installation. 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 valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters. After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. First clean the debris out of the valley including sawdust nails and whatever else is in there.