Gable Roof Valley Framing

Gable roof framing calculator plan diagram with full dimensions.

Gable roof valley framing.

Tie a new gable or hip roof to an existing gable or hip roof with valley rafters which perform the same function as ledgers. Therefore the pitch of the valley rafter is 12 in 17. The valley is formed where the two different sections of the roof meet generally at a 90 angle. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.

This type of roof is more complicated than the figure 2 1 most common types of pitched roofs. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. For a good straight fascia add an extra inch or 2 to the tails of all your rafters total length. Where two gable roof lines meet the intersection forms inside corners called valleys.

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. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. 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.

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. 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. Use 8 penny nails to attach the first 2 in 4 in 5 1 cm 10 2 cm board to the wall studs. A valley rafterforms a depression in the roof instead of a hip.

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. A roof for insulation solar panels and bedrooms intersecting roofs and gable ends form an interesting roofline and allow for usable space on the second level. Like the hip rafter it extends diago nally from the top plate to the ridge. The diagonal rafter that runs from the intersection of the ridges down to the top of the walls at the inside.

Framing the gable ends 1 nail 2 boards onto your walls as top plates.