Flat Roof Framing Plan Details

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

Flat roof framing plan details.

Roof framing and drainage plans will be discussed in chapter 30. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. Roof plans a roof plan is used to show the shape of the roof. This could mean flat roofs may not raise the same red flags they used to.

Flat roof construction for residential. The run or half the building span is the base of the triangle. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Flat roofs are hard to replace.

It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. Think of a flattened hip roof. This will help you create a flat roof framing plan. Old asbestos roofs are often replaced with flat roofs.

But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. Flat roofs are always built at a slight incline at least 1 8 inch per foot. Sizes of joists needed for flat roof construction. Materials such as the roofing material vents and their location.

The plan that is drawn of the roof area may be either a roof plan or a roof framing plan for some types of roofs a roof drainage plan may also be drawn. And the line length measurement from the roof peak to the building wall is the hypotenuse. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs. A flat roof has a slope of 1 8 per foot to 2 12.

A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. The rise or height of the roof at its peak is the altitude of the triangle. So any timber joists that are used need to be strong enough to support this weight. You can do this with a foam layer that exactly fits your roof.