Unequal Sloped Roofs

Drawing a superimposes the common rafters for the two roof pitches and illustrates the problem that occurs when roof layout starts at the outside edge of the exterior walls.

Unequal sloped roofs. This article is here to help. Major pitch angle minor pitch angle span plate line difference calculate major minor runs theoretical plate line. To calculate the main. Details about how roof slope is measured or calculated are at roof slope definitions.

Unequal pitch roof trigonometry calculating unequal pitched roofs is easy if you know what trigonometry functions to use. Unequal pitched valley rafter tail i ve installed 100 of false valley tails on unequal pitched roofs but this house presented a unique framing problem. In either case find a professional roofing contractor experienced with low slope roofs and these specific products. All of the other houses with the unequal pitched valley tails had rafter tails on each side of the valley tail and you could easily plane in the unequal pitched valley tail.

The formulas below use the law of sines to calculate the unknown length or angle. Explore framing complexities that result when roofs of two different pitches intersect. Flat roofs 0 to 2 in slope are flatter than low sloped roofs and pitch just enough to drain water. Putting a ladder on a sloped roof isn t a regular task.

Roof planes with unequal pitched roofs to check all of the rafter tools app results i draw geometric roof framing layouts in google sketchup. Where roofs of unequal pitch join it requires careful layout to create equalwidth soffits with equal height fascias. Learn more about off angle roof framing. In our photo left the roof slopes less than 1 per foot notice that dark ponding area at the center of the photo.

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. You can t just follow the same process you employ to place a ladder on a normal roof. The formulas below use the law of sines to calculate the unknown length or angle. As in all construction work paying attention to the little details can make all the difference between a long lasting trouble free project and one that results in callbacks and early failure never a good option with a new england roof.

Unequal pitch roof trigonometry calculating unequal pitched roofs is easy if you know what trigonometry functions to use.