Roof Valley Framing Details

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.

Roof valley framing details.

A roof valley is formed where two roof slopes meet. Your choice of valley installation method is critical because when improperly installed valleys are risks for serious leaks. This roof valley is a perfect example. Trussed valley set detail no sheathing continuous 2x4 sp no 2 attached to the roof 146 basic 160 ultimate mph wind speed.

Details for conventional wood frame construction the first approach to achieving a strong durable struc ture involving economical use of materials is to follow a. Framing a complex roof is one of the trickiest parts of home building. The valley is formed where the two different sections of the roof meet generally at a 90 angle. In a rafter roof all of these components are required to provide a stable roof.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. Essentially there are three main ways to shingle a roof valley. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. Not shown are the hip and valley rafters needed to tie the roof together where the rafters are framed at an angle to each other.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. This type of roof is more complicated than the figure 2 1 most common types of pitched roofs. Shed gable hip gambrel and mansard. 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.

Prescriptive roof consisting of the rafters a ridge board ceiling joists and collar ties. Another common design in the northeast is the saltbox which is a gable roof with one longer side. The rafters carry the applied loads to the exterior walls. Woven closed cut and open.

The function of each component is. 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. Water collects in a valley to flow off the roof. Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult.

The intersecting roof consists of a gable and valley or hip and valley.