A house is made of a number of crucial components that work together to provide it with structural integrity, longevity and the ability to defend against the elements. At the top of the house, the roofing material is the first line of defence against the weather but a roof is only as strong as the trusses beneath it. So how do you know what kind of roof truss is right for your home?
Basics Roof Trusses
Roof trusses are structural components that take the weight of roofing material such as tiles or slates. They are made most commonly from either timber or from steel and are nailed, pegged or bolted together to create a supportive roof base. Trusses are common in both homes and business premises as opposed to stick roof framing because it is stronger and can handle the weight load correctly. These trusses are often made in elsewhere and brought to the construction site ready to install so this also reduces the time needed to finish the property.
Roof trusses are generally more economical than other options because they are usually made from 2 x 4 stock which is a lot less expensive than the material used in stick roof framing. The trusses also can be installed by a number of tradesmen rather than needed a specialist on site, also saving money on the project.
Types Of Truss
While there are a number of different designs and formations of roof trusses available, most homes tend to use one of a smaller number of tried and tested styles. These are used around the country on most of the homes built as well as in properties being renovated where new roof trusses are required.
The king post truss is one of the most popular styles, mostly due to its durability, able to withstand the tension of a building for a long period of time. The design uses two main rafters along a central vertical post, called a king post, and a tie beam.
The queen post truss is often confused for the King Post Truss but is different. The queen truss uses two main rafters, the same as the king but it has two vertical posts rather than one. This makes for a bigger span and can even be expanded further using spliced joints.
The raised tie truss is used to make vaulted ceilings in the house and is where the ceiling is lifted to above the wall plate height.
The scissor truss is given its name for its resemblance to an open pair of scissors. The bottom part of the truss crosses one over another and then connect to the top part, known as the chords.
Most of the time, selecting the type of roof trusses needed for a project will be done by the architects or builders on the projects. But as with anything to do with your home, a good basic understanding of what they do and what benefits the different types offer means you are best informed when the decisions are made.