Roof Valley With Two Different Pitches

We ll start with the knowledge that the main roof has an 8 12 pitch.

Roof valley with two different pitches.

First we should establish the pitch of both roof planes. As another benefit to the roofing professional open valleys are sometimes used to easily bridge the gap between roof faces of vastly different pitches. This slope and skew calculator makes it easy by performing all of the necessary trigonometry for each hanger condition in the roof. Using a pitch measuring tool that i d made we also determined that the exact pitch of the shed roof was 3 1 2 in 12.

Joining these two roofs poses two main challenges. The piece that allows us to join the two different slopes is the pitch transition trim. If homeowners are looking to have their roof last for many years an open valley is iko s recommended choice and a good up sell opportunity for the roofing professional. Explore framing complexities that result when roofs of two different pitches intersect.

One is getting the two differently pitched planes to meet at the hip or valley rafter. Learn more about off angle roof framing. The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off. Blind valleys simplify framing to keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge.

The other is to get the fascias to line up. For example on a roof where the two sloping roof planes have different pitches the closed cut valleys can make the entire roof appear as if it s draping over the surface. Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet. A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration.

An open valley on the other hand doesn t look as good on valleys where the planes have different slopes. Open metal valleys also lack the aesthetic appeal of closed valleys.