Flat Roof Patio Framing

These decks are often referred to as floating as they are not secured in place as a stand alone structure.

Flat roof patio framing.

These patio covers tend to look like an extension of the home s main structure. From there the flat roof system you choose will determine the materials you apply. In areas with mild climates patio roofs are generally designed for loads of 30 psf pounds per square foot. This will help you create a flat roof framing plan.

Patio cover plans building. The roofing material is more traditional such as shingles. Here the rubber roof will need to run up the walls and glue to the sheathing. They are merely placed on top of another structure.

Flat roofs are always built at a slight incline at least 1 8 inch per foot. 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. Some roofs actually slope in several directions ensuring optimal water runoff. 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.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements. 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. The existing slab can vary considerably throwing off crucial measurements.

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. The tables below give maximum spans for rafters and beams. To keep water from pooling at these inside corners tom rips 2x4s lengthwise on a 45 degree bevel with a table saw.

On two sides the roof abuts a parapet a short wall common around flat roofs as well as a wall for the third floor. The figures are based on quality materials. Building a deck over a flat roof is very similar to building a deck over a concrete patio. 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.

This is a completion video of a flat roof framing.