Transition Joining Two Roofs With Different Pitches

To keep the porch roof framing as simple as possible we installed a structural ridge.

Transition joining two roofs with different pitches.

The piece that allows us to join the two different slopes is the pitch transition trim. The primary function of these two items is for sealing the edges of the roof. This allows water to flow off the upper panels out over the trim onto the lower panels and exits the roof at the eaves. Where the porch roof extended over the shed roof we installed a 2x6 ridge that ran from the top of the.

We ll start with the knowledge that the main roof has an 8 12 pitch. The roof is now combined and you re now good to go. Slide the right edge of the flashing under the highest roof pitch. First we should establish the pitch of both roof planes.

As a final touch cover the flashing with shingles. The other is to get the fascias to line up. Before joining two roofs with different pitches you can temporarily remove the eaves trim and replacing it after completing joining the roofs. Take a piece of the lumber and then slip it under the roof pitch that has a higher position.

Joining these two roofs poses two main challenges. Prepare two pieces of lumber with a 1 1 inches width. One is getting the two differently pitched planes to meet at the hip or valley rafter. After that cut each of them to fit the length of the joined area.

Joining two roofs of different pitches blind valleys simplify framing. The shingles may overlap to provide full coverage for the combined roof.