How To Frame A Roof Valley

Position the square at the end of the rafter board with the tongue on your left and facing away from you.

How to frame a roof valley.

Iko recommends that you install architectural shingles with the open valley method for the best roof performance. This gives the angle of the hip rafter. Soup to nuts riley shows the proper way of installing a valley on a roof. Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.

Framing a roof valley. 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. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. The valley rafter is marked for a 12 in 17 pitch and then cut with a double bevel to fit into the ridge intersection.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition. Soup to nuts riley shows the proper way of installing a valley on a roof. Unit run of the hip. At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.

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. I need some advice and benefits drawbacks to a couple different methods on getting my valleys built in. Add the length of the overhang beyond this mark and. 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.

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. 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. Getting the rafters right.

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. This recommendation includes iko s premium shingles. The three methods to shingle a roof valley.