How To Frame A Valley In A Roof

If doghouse dormers or shed dormers aren t dressy enough a dormers can add an exciting design note and they re easier to seal against the elements.

How to frame a valley in a roof. The roof framing plan. This will establish a center point. In conventional roof framing the. From there just run your chalkline down to the intersection of the trusses and sheathing and snap your valley lines.

The rise or height of the roof at its peak is the altitude of the triangle. 504 chapter 18 hip valley jack rafters. This is the only pic i have so its not the best example. New 2013 california valley framing requirements.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Install flat blocking below the new california valley sleeper. And the line length measurement from the roof peak to the building wall is the hypotenuse. Nail off the new roof sheathing at the shear wall schedule nailing pattern.

The general arrangement of rafters shown in the larger drawing. Framing a dramatic dormer. Soup to nuts riley shows the proper way of installing a valley on a roof. Soup to nuts riley shows the proper way of installing a valley on a roof.

Framing a roof valley. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. Do the math on a calculator so that you can concentrate on what s important. A mastery of roof framing with hip valley and jack rafters is what distinguishes the true hip rafters 18 1 figure 18 1 hip jack and valley rafters roof anatomy a.

Obviously sheet the roof thats under the layover trusses first. The valley jacks transmit the roof s weight load from the ridges to the valley rafters which in turn transmit the load downward to the walls. Then nail off the valley sleeper material at 6 o c. Then string a line across the peaks of the perpendicular trusses.

The run or half the building span is the base of the triangle. Getting the rafters right. 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.