Re lay the shingles you removed from the existing roof.
How to join a new roof to an existing roof.
You ll need to remove the existing shingles and cut back the existing eaves to make room for the shed roof then nail a two by six ledger board on the existing roof.
Attaching new roof to existing roof plans on how to attach a roof to another.
Shingle the addition roof letting the new shingles fold through the valley center and onto the old roof deck by at least 1 ft.
The ends of the shed rafters.
Up from the valley center.
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Take careful measurements to determine how many trusses you will need.
Remove shingles and other roofing material where the new roof will join down to the deck board of the old roof.
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Bed the end of each shingle in a 2 in wide ribbon of roofing cement placed 4 in.