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.
How to join two roofs different hights.
Mark a plumb line.
Position the flashing between the two roof pitches.
To keep the porch roof framing as simple as possible we installed a structural ridge.
Place the 2 by 4 inch piece of lumber along the center of the flashing.
A sketchup model helps clarify how various rafters and framing components are assembled in an off angle hip and valley configuration.
For each successive jack rafter step off the common difference.
Joining two roofs of different pitches blind valleys simplify framing.
Explore framing complexities that result when roofs of two different pitches intersect.
Prepare two pieces of lumber with a 1 1 inches width.
Joining two roofs with different heights the guide on how to join two roofs together in different heights is more or less similar to the steps on joining two roofs with similar pitch.
Start by laying it up the back side of the small gable then up the rake board then flat onto the main roof.
Learn more about off angle roof framing.
Take a piece of the lumber and then slip it under the roof pitch that has a higher position.
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.
This is the centerline of the first jack.
Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the.
The primary function of these two items is for sealing the edges of the roof.