Flat Roof Patio Framing

Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.

Flat roof patio framing.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. From there the flat roof system you choose will determine the materials you apply. To keep water from pooling at these inside corners tom rips 2x4s lengthwise on a 45 degree bevel with a table saw. Patio cover plans building.

They are merely placed on top of another structure. The existing slab can vary considerably throwing off crucial measurements. The roofing material is more traditional such as shingles. When framing a flat roof you will need to create a slight incline.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. These decks are often referred to as floating as they are not secured in place as a stand alone structure. 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. Here the rubber roof will need to run up the walls and glue to the sheathing.

Building a deck over a flat roof is very similar to building a deck over a concrete patio. This is a completion video of a flat roof framing. This will help you create a flat roof framing plan. The tables below give maximum spans for rafters and beams.

Take four pieces of 4x4 lumber and cut them to the desired height of your patio cover keeping in mind that the footings will add a little extra height to the final product. The figures are based on quality materials. First you must make sure the roof is strong enough to support 55 lbs per square foot. You can do this with a foam layer that exactly fits your roof.

These patio covers tend to look like an extension of the home s main structure. Flat roofs are always built at a slight incline at least 1 8 inch per foot. On two sides the roof abuts a parapet a short wall common around flat roofs as well as a wall for the third floor. This is a completion video of a flat roof framing.

Put a cement footing at each corner of the intended patio roof space and attach anchors to each footing.