Attach the horizontal beam by using a nail gun.
Tying a porch roof into existing roof.
In any case the structure.
Tying in to an existing gable roof.
That fascia should be cut off where it is inside of the porch addition.
Tying a patio roof into existing house.
Make a cutting on one of the sides of the horizontal roof beam on an angle.
You have to do it thoroughly so that the rafters sit flush on it.
Now take the 4x4 beams and erect them to the perimeter outside the porch about four feet apart.
First the 4x4 beams need to be cut to the size of the existing roof so the porch roof and the edge of the existing roof will be even when the job is complete.
Butt the first new truss against the old one.
Then mount new trusses on the new addition walls.
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.
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