Flat Roof Framing Design

You can do this with a foam layer that exactly fits your roof.

Flat roof framing design.

Within the roofing industry there are two basic types of roof framing. The two types of roof framing. Depending on the span many different materials can frame a flat roof. This will help you create a flat roof framing plan.

It may consist of a flat roof on top but the main design element is the multi pitch sloped in what is essentially a hip roof on top of another hip frame. Also known as the french roof the mansard is characteristic of french building architecture though many homes take advantage of it s framing design. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. In the past low quality insulation inadequate materials and poor workmanship left flat roofs with a reputation for water pooling and substandard performance.

Also different architectural styles will use the same type of roof. Each of these utilizes a fundamentally different approach to building the roof frame. For example in the case of stick framing you will use ordinary lumber for your rafters and beams and then build the frame. Intricate roofs have many parts that incorporate several of the basic roof designs such as a gable roof sitting atop a gambrel or variations of the gable valley roof design using one or a variety of different types of roof trusses also see our very detailed diagrams showing the different parts of a roof truss.

Shed gable hip gambrel and mansard. But today there are various modern systems available that make horizontal coverings a thermally efficient versatile and attractive option that will protect your home in the long term. Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult. A flat roof usually consists of the following.

Waterproof membrane to prevent water penetrating the structure and interior of the. Flat versus pitched technically a flat. Some roofs actually slope in several directions ensuring optimal water runoff. When framing a flat roof you will need to create a slight incline.

It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c. Flat roof framing is relatively straightforward. Flat roofs are always built at a slight incline at least 1 8 inch per foot. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.

Today flat roofs are used by architects for the same reasons that they became a cornerstone of modernist architecture. 2x framing wood joists timber framing laminated beams steel concrete or sips. Another common design in the northeast is the saltbox which is a gable roof with one longer side.