Gable Roof Valley Framing

Whether you re tying in new gable dormers or adding a chimney cricket during roof framing giving the valley jacks a place to land is an easy task with these step by step instructions.

Gable roof valley framing.

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. The valley is formed where the two different sections of the roof meet generally at a 90 angle. Gable roof framing calculator plan diagram with full dimensions. For a good straight fascia add an extra inch or 2 to the tails of all your rafters total length.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. The first cut that i make on both the common rafters and the valley rafter is the plumb cut where the rafter will meet the ridge board. Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs.

Tie a new gable or hip roof to an existing gable or hip roof with valley rafters which perform the same function as ledgers. The intersecting roof consists of a gable and valley or hip and valley. Like the hip rafter it extends diago nally from the top plate to the ridge. 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.

Where two gable roof lines meet the intersection forms inside corners called valleys. After they re up you can snap a line to mark and trim the tails in a nice straight line to make up for any ridge warp or marking cutting and fixing errors. 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. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.

Framing the gable ends 1 nail 2 boards onto your walls as top plates. Therefore the pitch of the valley rafter is 12 in 17. On the common rafters the plumb cut is marked with a framing square for a 12 in 12 pitch 45 and cut square i e no bevel. The diagonal rafter that runs from the intersection of the ridges down to the top of the walls at the inside.

This type of roof is more complicated than the figure 2 1 most common types of pitched roofs.