How To Tie A Roof Into A Trussed Roof

The positioning of your rafters will depend on the pitch of the porch roof.

How to tie a roof into a trussed roof.

The new roof will need to be cut to the right angle so that it fits snugly against the roof. After the ridge is cut to the correct angle and length it s nailed into place. 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 an important job and needs to be done.

Up from the valley center and cut through the shingles and underlayment. After the addition roof is framed and sheathed snap a line on the existing roof shingles 2 in. If you decide on a shallow pitch porch roof use 2 by 6 foot rafters. Make a cutting on one of the sides of the horizontal roof beam on an angle.

The roofing cement will resist possible leaks overnight. To scribe the roof angle on the ridge a length of stock is leveled over from the common rafters and a 2 by scrap is set against the sleepers. Attach the horizontal beam by using a nail gun. Joist hangers can help you mount each rafter to the house.

This is important to minimize the chance of any water being able to penetrate the gap. They form an upside down v with the point at the top of the addition roof. After that to make it flush with the roof of the existing house cut the two outer rafters. Use screws to secure the rafter to the sill plate.

The easiest way to tie in the new shingles with the old is with a cut valley see four ways to shingle a valley. The porch roof may match the pitch of your home or have a more shallow roof pitch. Step 3 connecting the new roof.