Now you have tied in the porch roof addition to the house.
How to tie in a porch roof to an existing roof.
Those 2x s create the bottom of your new valley and your jack rafters on the porch roof will extend from that up to your new ridge board.
Install the 2x4 joists with some screws and brackets to the house edge.
To do this we had to extend the plane of the shed roof out over the porch roof creating a small triangular extension of the existing roof.
Make sure the 2x4 joists are turned so the boards narrow edge faces the floor of the porch.
I am no framer.
Sep 12 2020 explore peter baker s board roof tie in on pinterest.
The edge of the roof of the house and the frame to the porch should be seamless now.
To tie into the side of an existing roof put a new roof truss on the walls of the addition brace it upright then snap chalklines on the shingles to mark the center line of the new roof valleys where old and new roofs will connect.
Fix the back channel to the fascia boards underneath the gutter directly.
I said all of that to say this.
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.
The bottom of our blind valley was about 30 inches short of the bottom of the porch roof so we extended the line of the valley down to the edge of the new roof.
Tying in to an existing gable roof.
This method may be one of the most ubiquitous ways of attaching a patio roof.
To do this method you will have the back channel and fascia strengthened by reinforcing two.
You could cut the new ridge board into the existing roof and tie it into the house rafters or trusses but i am not sure that is necessary.
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