Framing Rafters Into Existing Roof For A Covered Porch

A house attached patio roof takes advantage of the house s structure by supporting one end of the roof on a ledger mounted horizontally to the house.

Framing rafters into existing roof for a covered porch.

You have to do it thoroughly so that the rafters sit flush on it. Position the rafters on top of the sill plate. After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. After that to make it flush with the roof of the existing house cut the two outer rafters.

In the case of a lean to roof over an addition the existing rafters will have to be cut away to accommodate the addition and the shed roof will require support where it ties into the framing of. Once completed roofing paper will be installed. Make a cutting on one of the sides of the horizontal roof beam on an angle. The framing should be exactly 3 4 in.

Screw the roof plates through the roof boards into the rafters below. Shown is the new rafter system of the porch. When necessary to tie the new rafters into the house framing the workers cut into the old roof to make the secure connections. Complete the tie in by installing a pair of rafters.

The new ridge will tie into the existing roof as a hip and valley offshoot. Locating and mounting the ledger is normally a fairly easy process. How to tie a additions roof to existing roof roof designs to attach to existing home how to construct a roof from an exsisting shead how to attach a deck roof to existing roof how to add a roof over porch cost to tie into existing roof attache porch roof on house attach shed roof to house adding a roof to screened in porch adding a roof to existing. Calculate rise and run it is quite a simple task if you use the special online calculator to determine pitch roof slope and cut the rafter to the proper length.

The porch roof may match the pitch of your home or have a more shallow roof pitch. Draw the plan of you porch roof and make calculations. When building a porch roof asphalt shingles or other roofing material are then attached over the roofing paper and drip edge. In this case the homeowners wanted a covered porch added to the rear of their house.

The ledger should be attached before the foundation is built for a deck patio roof posts and other structure. To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge. Then attach drip edge over the roofing paper. The ledger typically a 2 by 6 is usually designed to hold one end of the patio roof rafters.

Attach the horizontal beam by using a nail gun. Above the top of the trusses. Sheathing 1 2 inch plywood or osb is nailed to the rafters. Trim the angle to fit and screw the ridge rafter to the first truss and roof plates.

Use screws to secure the rafter to the sill plate. Next measure for the ridge estimate the angle and cut it a little long. The positioning of your rafters will depend on the pitch of the porch roof.