Roof Valley Construction Details

To get the most out of it is helpful to also read parts 1 and 2.

Roof valley construction details.

There are two common methods for completing the flashing of a valley in a shingle roof system. These days cut ups or roofs with a lot of valleys dormers and other features are increasingly popular. Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings. Open valley closed cut valley and woven roof valley and we include roof valley underlayment and nailing specifications.

Essentially there are three main ways to shingle a roof valley. Part 1 a guide to roof construction covers an overview of flat and pitched roofs. When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. Another common design in the northeast is the saltbox which is a gable roof with one longer side.

Some grp valleys are sufficiently robust to enable them to be laid directly over the rafters rather than being supported on valley boards. We describe how to construct three common styles of roof valley. There are various techniques you ll need to know for each type of installation which we ll go over in detail. One of the details that varies between homes is the method of flashing the valley areas of the roof.

It is therefore worth asking the valley manufacturer for guidance on this. Woven closed cut and open. To understand what makes a valley either closed or open it is important to understand how a valley is constructed. Part 3 of the four part guide to roof construction covers pitched roof detail.

Closed valleys or open valleys. Preformed grp valleys in many ways the roof construction for a pre formed grp valley is the same as that for a lead lined valley.