Valley Roof Framing Details

Roofs are basically five types.

Valley roof framing details.

If you begin with accurate as built measurements and use a construction calculator to do the math you can cut all of the rafters for most roofs on the ground in just one shot. Another common design in the northeast is the saltbox which is a gable roof with one longer side. This roof valley is a perfect example. 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 intersecting roof consists of a gable and valley or hip and valley. This type of roof is more complicated than the figure 2 1 most common types of pitched roofs. The valley is formed where the two different sections of the roof meet generally at a 90 angle. Open valley closed cut valley and woven roof valley and we include roof valley underlayment and nailing specifications.

Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult. But it doesn t have to be. Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. 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.

Woven closed cut and open. Essentially there are three main ways to shingle a roof valley. A roof valley is formed where two roof slopes meet. 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.

Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles. This article discusses details and specifications for roof valley flashing for best construction roof leak resistance. We describe how to construct three common styles of roof valley. Water collects in a valley to flow off the roof.

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