Then attach drip edge over the roofing paper.
Framing rafters into existing roof for a covered porch.
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.
Position the rafters on top of the sill plate.
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.
When necessary to tie the new rafters into the house framing the workers cut into the old roof to make the secure connections.
Joist hangers can help you mount each rafter to the house.
Shown is the new rafter system of the porch.
In this case the homeowners wanted a covered porch added to the rear of their house.
Attach the horizontal beam by using a nail gun.
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.
When building a porch roof asphalt shingles or other roofing material are then attached over the roofing paper and drip edge.
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.
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.
Next measure for the ridge estimate the angle and cut it a little long.
Above the top of the trusses.
You have to do it thoroughly so that the rafters sit flush on it.
Sheathing 1 2 inch plywood or osb is nailed to the rafters.
The framing should be exactly 3 4 in.
The ledger typically a 2 by 6 is usually designed to hold one end of the patio roof rafters.
Make a cutting on one of the sides of the horizontal roof beam on an angle.
The porch roof may match the pitch of your home or have a more shallow roof pitch.
After that to make it flush with the roof of the existing house cut the two outer rafters.
Accurate and detailed plan and is crucial to building a durable and good looking porch roof.
Blind valleys simplify framing.
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Locating and mounting the ledger is normally a fairly easy process.
After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side.
Once completed roofing paper will be installed.
The new ridge will tie into the existing roof as a hip and valley offshoot.
The ledger should be attached before the foundation is built for a deck patio roof posts and other structure.
Complete the tie in by installing a pair of rafters.
