How To Join Two Roofs Different Hights

This is the centerline of the first jack.

How to join two roofs different hights.

Mark a plumb line. Start by laying it up the back side of the small gable then up the rake board then flat onto the main roof. Place the 2 by 4 inch piece of lumber along the center of the flashing. For each successive jack rafter step off the common difference.

After that cut each of them to fit the length of the joined area. Joining two roofs of different pitches blind valleys simplify framing. With either copper or lead you can do it with one piece by folding the sheet onto itself creating a z fold yielding a triple layer. Position the flashing between the two roof pitches.

Prepare two pieces of lumber with a 1 1 inches width. Explore framing complexities that result when roofs of two different pitches intersect. Slide the right edge of the flashing under the highest roof pitch. Take a piece of the lumber and then slip it under the roof pitch that has a higher position.

Learn more about off angle roof framing. To keep the porch roof framing as simple as possible we installed a structural ridge. Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the. The difference is only you have to fit rafter material or scrap or plywood at the back of common rafter in the section where both roofs meet.

A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration.