Framing Intersecting Roof Lines

Position the square at the end of the rafter board with the tongue on your left and facing away from you.

Framing intersecting roof lines.

Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Intersecting the intersecting roof consists of a gable and valley or hip and valley. Explore framing complexities that result when roofs of two different pitches intersect.

The ridge board is the horizontal framing member that defines the roofline in a gable roof. Add the length of the overhang beyond this mark and. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. In a standard gable roof the ridge.

Is that it is more difficult to construct than a gable roof. Keeping the outside edge of the blade flush with the edge of the plywood slide the square until the 12 inch mark on the tongue intersects with the hip. The valley is formed where the two different sections of the roof meet generally at a 90 angle. This type of roof is more complicated than the figure 2 1 most common types of pitched roofs.

A hip rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect. Thus there arehip jack raftersand valley jack rafters. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. Lay your square in the corner of the plywood drawing working from the side of the diagonal line that represents the main roof.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.