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What is the best roof truss design?

Roof trusses add necessary strength to the rafters and joints of a roof, ensuring the roof stays intact and that weight is distributed away from the walls of your home. Trusses come in a range of design options, and while all have their strengths and benefits the kind of truss you choose will depend on your particular design project. We look at the different kinds of timber roof trusses and which sort of construction jobs they’re best suited to.

Roof truss designs

It’s important you choose the most appropriate elements and materials for your construction project. There are five basic categories within roof truss design: dropped chord, parallel chord, raised chord, scissors, and raised heel.

Dropped chord roof trusses

Dropped chord trusses feature two chord trusses to reduce uplift and provide a vapour barrier, which reduces condensation in areas of higher humidity. These trusses have excellent insulation potential, making them a great option if you live in a particularly warm or cool climate. As they come with vapour barriers, they require extra blocking and siding at the wall and ceiling joints, which may raise the cost of construction.

Parallel chord roof trusses

As parallel chord trusses incorporate steel, they are more expensive than other options. Steel also creates thermal bridging, making these trusses less energy efficient. Parallel chord trusses are often used by buildings with high ceilings, as they’re a durable, sturdy option that provides an aesthetically pleasing result.

Raised chord roof trusses

These trusses are the most common design used in residential projects. They simplify attic ventilation and offer extra space above exterior wall top plates for insulation, meaning you’ll be more comfortable in winter and summer.

Scissor roof trusses

These trusses are common in projects with vaulted ceilings. They slope inwards and offer ample support, meaning there’s no need for bare beams. At the same time, the particular design of these trusses means they’re difficult to insulate, so it may not be the best choice if you’re wanting to keep your home comfortable and energy efficient.

Raised heel trusses

If you’re after an energy-efficient truss, a raised heel may be the right choice for you. The combination of design elements creates the perfect vapour barrier. They do cost more due to their insulation qualities, but the expense does pay off thanks to the protection the design will afford your home. Buildings with attic spaces usually incorporate raised heel trusses in their design.

How do I know which roof truss is right for me?

Whatever your build, it’s important you choose timber wall frames and roof trusses that are well-designed and expertly made. This ensures their strength and ability to withstand significant compression and tension forces. Material is also important, and timber prefabricated roof trusses offer exceptional strength and durability. A well-supported roof will properly reflect UV rays, and keep condensation and mould at bay.

Need the perfect timber roof trusses for your home?
Contact Heyden Frame and Truss

We can provide quotes, budgets, and advice, so please contact us today on (02) 4351 2616 and speak to one of our experts. You can also visit us at www.heydenframeandtruss.com.au, if you need additional information about our products and services. We service the regions of Sydney, Gosford, Newcastle, Central Coast, and surrounding areas.

We supply and deliver all over Northern Sydney, Newcastle and the Central Coast.

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