Roof Structure Plan

Roof framing in this chapter we will introduce you to the fundamentals of roof design and construction.

Roof structure plan.

Conventional slope roof range between 4 in 12 and 8 in 12. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years. The design of the roof will depend upon the size and shape of the ground fl oor plan of the building. Anything more than 9 in 12 is considered steep.

Also different architectural styles will use the same type of roof. A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof. But before discussing roof framing we will first review some basic terms and definitions used in roof construction. A low slope roof is anywhere from 2 in 12 to 4 in 12.

Another common design in the northeast is the saltbox which is a gable roof with one longer side. These days cut ups or roofs with a lot of valleys dormers and other features are increasingly popular. Although ceramic tile roofs are expensive they can have a life span of over 100 years. Double roof with hipped end there are many designs and combinations of double roofs.

In modern double roof construction the whole of the roof is constructed of lightweight roof trusses called trussed rafters see module 4. In many cases with purchased house plans the details of the roof construction including rafter design are included. Put roof sheathing on top of your roof. Roof shapes differ greatly from region to region.

While hip roofs are stronger and more wind resistant they can be prone to leaks due to the increased level of joins required so care must be taken to. Use 1 2 in 1 3 cm plywood to cover the entire surface of your roof. Roof terminology is also not rigidly defined. Domestic roof construction is the framing and roof covering which is found on most detached houses in cold and temperate climates.

Use construction nails 6 in 15 cm apart to secure the plywood around the outer perimeter and along each support. Hip roofs tend to be stronger than gable roofs but there is an increased cost in building a hip roof as it s a more complicated structure that requires more building materials and effort. We will then discuss the framing square and learn how it s used to solve some basic construction problems. Steeper sloped roofs are considered more aesthetically pleasing and last longer.

Such roofs are built with mostly timber take a number of different shapes and are covered with a variety of materials. 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. Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run. The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering.

Usages vary slightly from region to region or from one builder or architect to another.