Set the last truss or set of rafters for the new roof at the outside edge of the existing roof.
How to tie in a new roof to an existing roof.
Butt the first new truss against the old one.
Sep 12 2020 explore peter baker s board roof tie in on pinterest.
The easiest way to tie in the new shingles with the old is with a cut valley see four ways to shingle a valley.
Tying in to an existing gable roof tie into the end of an existing gable roof by removing existing facing boards wall siding and any other obstructions back to the first truss of the old roof.
Then mount new trusses on the new addition walls.
Up from the valley center and cut through the shingles and underlayment.
The roofing cement will resist possible leaks overnight.
Measure between that truss or rafter and the valley rafters with a tape measure and cut short rafters.
If you don t remove the stone and you put new roof over it the water will get underneath the gravel so make sure you clear it away.
See more ideas about patio roof building a porch porch addition.