Roof Structure Plan

Roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.

Roof structure plan.

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. 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. We will then discuss the framing square and learn how it s used to solve some basic construction problems.

A 12 in 12 roof can cost up to 50 more than a 4 in 12 roof. Conventional slope roof range between 4 in 12 and 8 in 12. Use construction nails 6 in 15 cm apart to secure the plywood around the outer perimeter and along each support. The main factors which influence the shape of roofs are the climate and the materials available for roof structure and the outer covering.

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. Steeper sloped roofs are considered more aesthetically pleasing and last longer. But before discussing roof framing we will first review some basic terms and definitions used in roof construction.

These benefits do not come cheaply though. These days cut ups or roofs with a lot of valleys dormers and other features are increasingly popular. Such roofs are built with mostly timber take a number of different shapes and are covered with a variety of materials. Roof framing in this chapter we will introduce you to the fundamentals of roof design and construction.

Domestic roof construction is the framing and roof covering which is found on most detached houses in cold and temperate climates. In many cases with purchased house plans the details of the roof construction including rafter design are included. 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. Also different architectural styles will use the same type of roof.

Use 1 2 in 1 3 cm plywood to cover the entire surface of your roof. Place a piece of the plywood on the bottom corner of your roof making sure the edges are on a rafter beam. Put roof sheathing on top of your roof. Roof terminology is also not rigidly defined.

Usages vary slightly from region to region or from one builder or architect to another. It is often compared to slope but is not exactly the same. In modern double roof construction the whole of the roof is constructed of lightweight roof trusses called trussed rafters see module 4. Shingle roofs typically have a life span of 15 30 years while membrane roofs usually last 5 15 years.

A low slope roof is anywhere from 2 in 12 to 4 in 12.