Flat Roof Framing Design

When framing a flat roof you will need to create a slight incline.

Flat roof framing design. Depending on the span many different materials can frame a flat roof. Shed gable hip gambrel and mansard. Within the roofing industry there are two basic types of roof framing. It can be framed like a floor system with horizontal framing members at 16 19 or 24 o c.

Each of these utilizes a fundamentally different approach to building the roof frame. Flat roofs are always built at a slight incline at least 1 8 inch per foot. Also known as the french roof the mansard is characteristic of french building architecture though many homes take advantage of it s framing design. 2x framing wood joists timber framing laminated beams steel concrete or sips.

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. Flat roof construction for residential. Another common design in the northeast is the saltbox which is a gable roof with one longer side. Waterproof membrane to prevent water penetrating the structure and interior of the.

Flat versus pitched technically a flat. Roofs are basically five types. Roof framing is one of those carpenter skills that appears quite complicated and indeed some roof designs are difficult. 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.

Contemporary designers frequently aim to produce the same clear and simplified forms that appeared at the beginning of the 20th century but are now free to use a wide range of new materials and construction techniques that reflect present day technology. In the past low quality insulation inadequate materials and poor workmanship left flat roofs with a reputation for water pooling and substandard performance. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. A flat roof usually consists of the following.

Also different architectural styles will use the same type of roof. This will help you create a flat roof framing plan. Flat roof framing is relatively straightforward. Although flat roofs are cheaper to build than pitched roofs they have a shorter life span.

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. For example in the case of stick framing you will use ordinary lumber for your rafters and beams and then build the frame. Today flat roofs are used by architects for the same reasons that they became a cornerstone of modernist architecture.