How To Frame A Roof Valley

Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

How to frame a roof valley.

Draw a diagonal line between 9 feet the run of the main roof on the tongue of the square and 7 feet 6 inches the secondary roof run on the blade. Do the math on a calculator so that you can concentrate on what s important. The three methods to shingle a roof valley. Framing a roof valley.

Unit run of the hip. The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. Getting the rafters right. Position the square at the end of the rafter board with the tongue on your left and facing away from you.

This recommendation includes iko s premium shingles. Framing a dramatic dormer. In a hip roof with equal pitches the unit run of a hip or valley rafter is 17 inches for every 12 inches of run in the main roof. Add the length of the overhang beyond this mark and.

This gives the angle of the hip rafter. Need some advice on valley framing with trusses i am a beginner contractor been in business almost 6 years starting out with roofing and working my way up and have landed my first house project. 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.

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. 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. 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.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. Iko recommends that you install architectural shingles with the open valley method for the best roof performance. I need some advice and benefits drawbacks to a couple different methods on getting my valleys built in.