How To Frame A Flat Roof

Sizes of joists needed for flat roof construction.

How to frame a flat roof.

It will be much more difficult to build a round roof onto a square building for instance so allow the shape of the structure to guide you. Old asbestos roofs are often replaced with flat roofs. Flat roofs are always built at a slight incline at least 1 8 inch per foot. The two major categories of roof are flat and pitched and one of the main things that will determine the actual style of roof you need is the shape of the building.

You can do this with a foam layer that exactly fits your roof. When framing a flat roof you will need to create a slight incline. This will help you create a flat roof framing plan. Frame the roof photo by russell kaye the most important thing to know about a flat roof says tom is that it s not flat to prevent water from pooling and eventually invading the home flat roofs are always built on a slight incline at least 1 8 inch per foot.

So any timber joists that are used need to be strong enough to support this weight. Some roofs actually slope in several directions ensuring optimal water runoff.