Soup to nuts riley shows the proper way of installing a valley on a roof.
How to construct a valley on a pitched roof.
At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.
This gives the angle of the hip rafter.
To get the most out of it is helpful to also read parts 1 and 2.
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Soup to nuts riley shows the proper way of installing a valley on a roof.
Unit run of the hip.
Valley roof the valley roof option is used to calculate valleys for 90 degree intersecting roofs with equal slopes and wall plates at the same height.
This type of construction involves the use of factory made frames called tresses each of these trusses includes combining the joist.
Of run for the valley rafter to rise the same distance that the common rafters rise in 12 in.
The heel height overhang and ridge and fascia boards for both roofs will be the same.
Unlike the cut roof method this method does not have a carpenter onsite creating pieces to be placed together on a roof.
Roof ridges and ridge tiles roof hips and hip tiles roof valleys roof verges and lead flashings.
To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.
Therefore the pitch of the valley rafter is 12 in 17.
Another pitched roof construction manner is the truss roof method.
Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes.
For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2.
The hip and valley factor varies according to the slope of the roof as shown in the table below.
Part 3 of the four part guide to roof construction covers pitched roof detail.
Divide the rise by the run the run is 12.
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.
The blind valley roof can be used to calculate valleys for roofs with unequal slopes.
