Flat Roof Framing Plan Details

Flat roofs are hard to replace.

Flat roof framing plan details.

Roof framing and drainage plans will be discussed in chapter 30. You can do this with a foam layer that exactly fits your roof. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. Flat roofs are always built at a slight incline at least 1 8 inch per foot.

The rise or height of the roof at its peak is the altitude of the triangle. 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. Some roofs actually slope in several directions ensuring optimal water runoff. So any timber joists that are used need to be strong enough to support this weight.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. Materials such as the roofing material vents and their location.

This could mean flat roofs may not raise the same red flags they used to. If you build a flat roof try to have it slope in multiple directions to drains or gutters. This will help you create a flat roof framing plan. The run or half the building span is the base of the triangle.

Think of a flattened hip roof. A flat roof has a slope of 1 8 per foot to 2 12. And the line length measurement from the roof peak to the building wall is the hypotenuse. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped.

Sizes of joists needed for flat roof construction. Flat roof construction for residential. But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. When framing a flat roof you will need to create a slight incline.