Flat Roof Framing Plan Details

Roof plans a roof plan is used to show the shape of the roof.

Flat roof framing plan details.

Flat roof construction for residential. This will help you create a flat roof framing plan. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. Some roofs actually slope in several directions ensuring optimal water runoff.

But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. The rise or height of the roof at its peak is the altitude of the triangle. Roof framing and drainage plans will be discussed in chapter 30. Think of a flattened hip roof.

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. When framing a flat roof you will need to create a slight incline. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle.

And the line length measurement from the roof peak to the building wall is the hypotenuse. So any timber joists that are used need to be strong enough to support this weight. 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. As you may imagine there is a fair amount of weight involved here in terms of boards felt etc.

Materials such as the roofing material vents and their location. Flat roofs are hard to replace. A flat roof has a slope of 1 8 per foot to 2 12. If you build a flat roof try to have it slope in multiple directions to drains or gutters.

Flat roofs are always built at a slight incline at least 1 8 inch per foot. 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. You can do this with a foam layer that exactly fits your roof. This could mean flat roofs may not raise the same red flags they used to.