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.
Framing shed roof over porch.
Look through deck design books and.
Measure the entire deck to define how much room the shed roof should cover.
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How to build a shed roof over a deck step 1.
After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side.
Shed roofs project as a single plane roof pitched away from the house.
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Once completed roofing paper will be installed.
If you plan to have eaves to protect the shed walls make sure you add the extra length when measuring the rafters.
Sheathing 1 2 inch plywood or osb is nailed to the rafters.
If you are tying the roof directly to a house wall you can install a ledger board with flashing and install rafter ties to attach the rafters at the appropriate angles or use engineered trusses.
The skillion and shed style roofs are framed with a single slope 2 4 or 2 6 or thicker rafters spanning from the low wall to the high wall.
The opposite side of the porch roof will be supported by a header beam that is installed parallel to the house on top of 6x6 support posts.
When building a porch roof asphalt shingles or other roofing material are then attached over the roofing paper and drip edge.
Then attach drip edge over the roofing paper.
Pre cut the rafters and support.
A metal deck roof will add shade and make your deck or patio space more comfortable during the hot summer months.