Flat Roof Patio Framing

Patio cover plans building.

Flat roof patio framing.

The existing slab can vary considerably throwing off crucial measurements. Building a deck over a flat roof is very similar to building a deck over a concrete patio. 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. The figures are based on quality materials.

In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. These patio covers tend to look like an extension of the home s main structure. This is a completion video of a flat roof framing. When framing a flat roof you will need to create a slight incline.

Put a cement footing at each corner of the intended patio roof space and attach anchors to each footing. For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. Flat roofs are always built at a slight incline at least 1 8 inch per foot. Here the rubber roof will need to run up the walls and glue to the sheathing.

The roofing material is more traditional such as shingles. 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. From there the flat roof system you choose will determine the materials you apply. The tables below give maximum spans for rafters and beams.

On two sides the roof abuts a parapet a short wall common around flat roofs as well as a wall for the third floor. First you must make sure the roof is strong enough to support 55 lbs per square foot. These decks are often referred to as floating as they are not secured in place as a stand alone structure. To keep water from pooling at these inside corners tom rips 2x4s lengthwise on a 45 degree bevel with a table saw.

A timber framed patio roof is perfect for your rustic or country home. These traditionally styled roofs are made of wood and feature large supportive beams. This is a completion video of a flat roof framing. You can do this with a foam layer that exactly fits your roof.

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.