Flat Roof Framing Details

A flat roof usually consists of the following.

Flat roof framing details.

Details for conventional wood frame construction the first approach to achieving a strong durable struc ture involving economical use of materials is to follow a. And the line length measurement from the roof peak to the building wall is the hypotenuse. This ethylene propylene diene monomer rubber covering is very versatile long lasting and very strong. The flat roof covering can also be epdm.

The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. You can do this with a foam layer that exactly fits your roof. This flat roof covering can be roofing felt usually 3 layers with a mineral chipping topping to soak up the heat of the sun which protects the felt from both melting and breakdown under uv rays. Some roofs actually slope in several directions ensuring optimal water runoff.

When framing a flat roof you will need to create a slight incline. 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. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. A flat roof has a slope of 1 8 per foot to 2 12.

It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. If you build a flat roof try to have it slope in multiple directions to drains or gutters. 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. From there the flat roof system you choose will determine the materials you apply.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. This will help you create a flat roof framing plan. The run or half the building span is the base of the triangle. The rise or height of the roof at its peak is the altitude of the triangle.

Waterproof membrane to prevent water penetrating the structure and interior of the building. Think of a flattened hip roof.