Transition Joining Two Roofs With Different Pitches

By john carroll download the pdf version of this article.

Transition joining two roofs with different pitches.

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration. One is getting the two differently pitched planes to meet at the hip or valley rafter. Place the 2 by 4 inch piece of lumber along the center of the flashing. Measure 1 1 2 from bottom edge of transition flashing.

A roof pitch transition is a line in the roof plane that changes pitch. We see this quite frequently in log home roofs with porches for example. Joining two roofs with different pitches is a method that exists in the building and construction world. Explore framing complexities that result when roofs of two different pitches intersect.

They form an upside down v with the point at the top of the addition roof. Joining these two roofs poses two main challenges. If by any chance right now you are looking for the information about how to join two roofs if they have different pitches here we will share all the information we know with. Transition flashing installation guide 1.

To transition the eaves the. We re going to install it over top of the panels that have already been installed on the lower slope. The roof plane goes from one pitch to a lower pitch. See the illustration below.

Jlc classics joining two roofs of different pitches. Slide the right edge of the flashing under the highest roof pitch. 489 78 kb my business partner and i recently added a large screened in porch with a gable roof onto a client s home. This technique is beneficial particularly in home expansion.

This is a fairly common roof detail. Pitch transitions are a common roof detail. The other is to get the fascias to line up. After bottom roofing panels have been installed set one piece of transition flashing down where the top portion non hemmed of the transition flashing lies flat on the upper roof 3.

Position the flashing between the two roof pitches. The overhang is 16 inches measured horizontally and the fascia runs at a continuous height around the entire house. Cut two rafters with a circular saw to the pitch of the addition roof and nail them across the rafters on the old roof. Learn more about off angle roof framing.

The piece that allows us to join the two different slopes is the pitch transition trim.