Deck Roof Framing Details

When you are building a patio cover off of an existing roof or wall you must take all of your measurements from the point at which the patio roof will attach to the existing structure not the outside of the slab.

Deck roof framing details. Shed roofs project as a single plane roof pitched away from the house. Some key details for a leakproof rooftop deck are. Patio cover plans building. Photo by dave holbrook.

The existing slab can vary considerably throwing off crucial measurements. Hand framing a porch roof involves first setting the ridge beam and the side walls to the proper height that the roof will hang from. First you must make sure the roof is strong enough to support 55 lbs per square foot. Prescriptive residential wood deck construction guide 5 american wood council figure 1b.

Careful detailing of membrane roofs at corners doorways and penetrations is critical for long term performance. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Shed roof for most homes a shed roof may be the only option that will work with the existing architecture. And the line length measurement from the roof peak to the building wall is the hypotenuse.

Building a deck over a flat roof is very similar to building a deck over a concrete patio. Beam size assembly requirements deck beam spans shall be in accordance with table 3 and can extend past the post face up to l b 4 as shown in figure 3. Let the epoxy set leaving it overnight will assure that it is rock solid and then add the anchor bolt anchor washer and nut and tighten. Flat roofs are more susceptible to leaking than pitched roofs.

The run or half the building span is the base of the triangle. Joist span non ledger deck. We include walk on roof surfaces roofing membrane to use below a rooftop deck and construction of rooftop deck railings and posts. Securing it to the home.

Rooftop decks walk on roofs. The roof deck surface should sloped away from the house a minimum 1 8 inch per foot so the water will. 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. They are merely placed on top of another structure.

Most porch roofs use 2x6 or 2x8 rafters that form an upside down v across the ridge beam. These decks are often referred to as floating as they are not secured in place as a stand alone structure. This article discusses rooftop deck construction details to avoid building leaks or rooftop deck safety hazards. Check local building code to see if you can attach a patio roof directly to your deck.

Epdm is the best choice for most rooftop decks. The rise or height of the roof at its peak is the altitude of the triangle. Building a hip roof on a detached deck is much simpler than one that s attached to a home as you can match the roof s pitch on each side instead of trying to match it to the existing pitch on the roof of your home.