Wood Porch Roof Framing Details

Epdm is the best choice for most rooftop decks.

Wood porch roof framing details.

The house roof sloped 5 in. 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. Some key details for a leakproof rooftop deck are. Your roof may vary from this and the details of how the porch ties in will vary as well.

The rise or height of the roof at its peak is the altitude of the triangle. Flat roofs are more susceptible to leaking than pitched roofs. Mark the width of the deck on the house as well to help you position the frame later. All construction shall comply with international residential code 2.

The details were adapted from figures in the apa publication the advanced framing construction guide form m400 which highlights construction. Per foot this is called a 5 12 slope and extended 18 in. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. The run or half the building span is the base of the triangle.

And the line length measurement from the roof peak to the building wall is the hypotenuse. Conventional light frame wood structures may be built without the need for engineering analysis of each component. The roof deck surface should sloped away from the house a minimum 1 8 inch per foot so the water will. The provisions for prescriptive roof construction are found in chapter 8 of the irc and in section 2308 of the ibc.

Measure down the thickness of the decking plus the width of the joists and support beams. Within limitations which include among others building size roof. We show you how both a typical rafter style porch and truss roof area constructed. These illustrations above show the plans for the screened in porch deck framing gable framing ledger truss block side walls and the end wall.

Building a porch roof requires basic carpentry and porch roof framing knowledge. All wood to be 2 douglas fir or better. We show you the steps involved and calculations required for buildng a roof for your porch or constructing one over your deck or patio. Shed roofs project as a single plane roof pitched away from the house.

Details for conventional wood frame construction the first approach to achieving a strong durable struc ture involving economical use of materials is to follow a. This notes the top of the posts. 12ft 2 sq x 1 d 4x8 10ft 2x8 24 o c. This is known as prescriptive framing.

The deck should be below the door threshold to keep water out of the house. Porch depth footing size beam size max beam span rafter size post size 10ft 18 sq x 1 d 4x8 10ft 2x6 24 o c.