How To Frame A Valley In A Roof

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.

How to frame a valley in a roof.

The general arrangement of rafters shown in the larger drawing. Install flat blocking below the new california valley sleeper. New 2013 california valley framing requirements. This is the only pic i have so its not the best example.

Getting the rafters right. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. This will establish a center point. Then nail off the valley sleeper material at 6 o c.

Soup to nuts riley shows the proper way of installing a valley on a roof. Do the math on a calculator so that you can concentrate on what s important. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. 504 chapter 18 hip valley jack rafters.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. The run or half the building span is the base of the triangle. The rise or height of the roof at its peak is the altitude of the triangle. 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.

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. Soup to nuts riley shows the proper way of installing a valley on a roof. Obviously sheet the roof thats under the layover trusses first. Framing a dramatic dormer.

Nail off the new roof sheathing at the shear wall schedule nailing pattern. The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. 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. And the line length measurement from the roof peak to the building wall is the hypotenuse.

Framing a roof valley. 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.