Flat Roof Frame Construction

Flat roof construction for residential.

Flat roof frame construction.

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. It is the form most commonly used by. Sizes of joists needed for flat roof construction. Common types of roofs and basic framing terms.

And the line length measurement from the roof peak to the building wall is the hypotenuse. A flat roof has a slope of 1 8 per foot to 2 12. If you want a diy flat roof here are the steps to follow. So any timber joists that are used need to be strong enough to support this weight.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. If you build a flat roof try to have it slope in multiple directions to drains or gutters. The framing of a basic gable roof is based on a right angle triangle and the various roof framing components fit the triangle. An example of each is shown in figure 2 1.

Framing a roof is the last step in framing new construction. Old asbestos roofs are often replaced with flat roofs. It is not ideal for snow or heavy rain but modern materials and proper drainage have helped. Gable a gable roof has a ridge at the center and slopes in two directions.

Waterproof membrane to prevent water penetrating the structure and interior of the. Below is an easy to follow manual for building flat roofs including a guide to flat roof framing and installation with plenty of details and specifications about the frame. One important and perhaps not so obvious fact is that a flat roof is not. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below. The run or half the building span is the base of the triangle. A flat roof usually consists of the following.