Valley Roof Framing Details

Framing a complex roof is one of the trickiest parts of home building.

Valley roof framing details.

But it doesn t have to be. Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Woven closed cut and open. Essentially there are three main ways to shingle a roof valley.

Open valley closed cut valley and woven roof valley and we include roof valley underlayment and nailing specifications. The intersecting roof consists of a gable and valley or hip and valley. Shed gable hip gambrel and mansard. This type of roof is more complicated than the figure 2 1 most common types of pitched roofs.

Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. The valley is formed where the two different sections of the roof meet generally at a 90 angle. This roof valley is a perfect example. Another common design in the northeast is the saltbox which is a gable roof with one longer side.

Water collects in a valley to flow off the roof. However since there is some load transfer with these members the code requires a nominal 2 thickness and bracing to a load bearing partition at the upper end or to be designed as a beam with proper supports. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles.

Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult. This article discusses details and specifications for roof valley flashing for best construction roof leak resistance. Roofs are basically five types. Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks.

We describe how to construct three common styles of roof valley.