How To Tie A New Roof To An Existing Roof

The roofing cement will resist possible leaks overnight.

How to tie a new roof to an existing roof.

Roofing nails to the existing structural sheathing. Then mount new trusses on the new addition walls. After nailing down these two boards dab roofing cement on the nails and along the outside edge. Measure between that truss or rafter and the valley rafters with a tape measure and cut short rafters.

The easiest way to tie in the new shingles with the old is with a cut valley see four ways to shingle a valley. 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. 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.

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. Butt the first new truss against the old one. The ends of the shed rafters. Up from the valley center and cut through the shingles and underlayment.

Chip away the existing gravel exposing the stone underneath. After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in. The lower the slope the further it should extend. 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.

Tying in to an existing gable roof. The big idea is that layers of the lower roof should sit below corresponding layers of the upper roof. Depends on the slope of the new roof.