How To Frame A Roof Valley

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.

How to frame a roof valley.

Iko recommends that you install architectural shingles with the open valley method for the best roof performance. Unit run of the hip. 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. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

Framing a dramatic dormer. In conventional roof framing the. 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. Position the square at the end of the rafter board with the tongue on your left and facing away from you.

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. I need some advice and benefits drawbacks to a couple different methods on getting my valleys built in. Do the math on a calculator so that you can concentrate on what s important. Getting the rafters right.

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing. This recommendation includes iko s premium shingles. 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. To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.

Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. 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. When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof. Soup to nuts riley shows the proper way of installing a valley on a roof.

The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection. Add the length of the overhang beyond this mark and. The three methods to shingle a roof valley.