Shingle the addition roof letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft.
How do i put the roof on an addition.
It is almost similar to the first method but to make the patio roof a little bit higher you will need to remove the house gutter and place the back channel a bit higher.
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They form an upside down v with the point at the top of the addition roof.
Make the patio roof a little bit higher.
Cut two rafters with a circular saw to the pitch of the addition roof and nail them across the rafters on the old roof.
This is the simplest solution a single slope that s attached to the original house at the high point and slants down to the outer wall of the addition.
Now you can begin shingling your roof preferably with asphalt shingles.
Once the trusses soffit and fascia are in place lay the roofing felt in place.
Bed the end of each shingle in a 2 in wide ribbon of roofing cement placed 4 in.
Re lay the shingles you removed from the existing roof.
It s easy for the contractor to build and easy on the homeowner s budget says schultz but it makes the new space look like an obvious add on.
To do this method you will have the back channel and fascia strengthened by reinforcing two rafters inside the roof.
Up from the valley center.