Flat Roof Patio Framing

Building a deck over a flat roof is very similar to building a deck over a concrete patio.

Flat roof patio framing.

A timber framed patio roof is perfect for your rustic or country home. Here the rubber roof will need to run up the walls and glue to the sheathing. From there the flat roof system you choose will determine the materials you apply. Put a cement footing at each corner of the intended patio roof space and attach anchors to each footing.

Some roofs actually slope in several directions ensuring optimal water runoff. 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. 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.

This is a completion video of a flat roof framing. 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. The existing slab can vary considerably throwing off crucial measurements.

These traditionally styled roofs are made of wood and feature large supportive 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. These patio covers tend to look like an extension of the home s main structure. This will help you create a flat roof framing plan.

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. This is a completion video of a flat roof framing. The roofing material is more traditional such as shingles.

When framing a flat roof you will need to create a slight incline. Patio cover plans building. 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. You can do this with a foam layer that exactly fits your roof.

For heavy roofs or in areas with substantial snowfall or winds call your local building department for code requirements.