How To Join Two Hip Roofs Together

At the low end of the valley the subfascias of the two roofs are mitered with a block filling in the roof framing.

How to join two hip roofs together.

We re going to install it over top of the panels that have already been installed on the lower slope. We ll start with the knowledge that the main roof has an 8 12 pitch. The piece that allows us to join the two different slopes is the pitch transition trim. The other is to get the fascias to line up.

Sheathing blocking is added along the valley and the sheathing pieced in for both roof planes. Cut two rafters with a circular saw to the pitch of the addition roof and nail them across the rafters on the old roof. First we should establish the pitch of both roof planes. This allows water to flow off the upper panels out over the trim onto the lower panels and exits the roof at the eaves.

This latest project was in early december in lambeth ontario for a residential home that had an existing sloped or shingled roof that needed to tie into a ne. One is getting the two differently pitched planes to meet at the hip or valley rafter. Joining these two roofs poses two main challenges. They form an upside down v with the point at the top of the addition roof.

To transition the eaves the horizontal fascia extends to the last rafter tail and a vertical return finishes the transition.