TIMBER FRAME
Your questions answered about this popular method of construction
Afactory-manufactured timber frame is a great option for self builders. The supplier will provide panels for the full load-bearing structure, either in open- or closed-panel systems. Both options are formed of a network of structural studs, sandwiched in wood-based sheathing. Insulation is packed between the layers, with openings for windows and doors pre-cut in the factory. Self builders can choose from a range of finishes, including render, cladding and brickwork.
What’s the difference between openand closed-panel timber frames?
With open-panel arrangements, building components are delivered to site with the internal face of the panels left uncovered so insulation and finishes can be applied later.
Closed-panel units are insulated in the factory. Windows, doors and wall finishes can be installed before delivery, too, paving the way for an efficient construction process.
Is energy efficiency guaranteed?
Closed-panel timber construction performs particularly strongly on this front. “Because more of the work is done in the factory, it ensures a greater degree of accuracy,” says Derek Dawson, managing director of Scandia-hus. “High levels of insulation and airtightness are number one on the sustainability priority list, as the financial and environmental costs of energy continue to rise. This build method is compatible with a cleaner and greener future.”
Can design changes be made on site?
The bulk of your decisions need to be made early in the project. “It’s going to be difficult and costly for you to make structural changes once plans have been finalised,” says Kelly Newlands from Potton. “Timber frame requires accurate foundations, so these may have to be altered if load-bearing elements are moved.”
How quick will the building go up?
“The timber frame is manufactured offsite in a qualitycontrolled environment, meaning the superstructure can be erected far quicker than masonry,” says Kelly. Once delivered, the structural shell can take as little as one to two weeks to be assembled. Bear in mind, though, that most timber frame kits come with a lead time of around 12 weeks. However, this gives you time to get the groundworks done in the interim.
How much will it cost?
Expect to pay upwards of £1,500 per m2 for a timber frame home. This figure will rise if labour costs in your area are higher or you’re creating a high-spec house.
How do I choose a build partner?
Engaging with the right supplier is vital to the success of your project. “Your timber company is an expert in the material, so rather than paying a designer who might not know what they’re dealing with, take your questions to a specialist from the outset,” says Simon Orrells, managing director of Frame Technologies. “Choose an accredited manufacturer. Look out for the STA Assure logo, which means the business has been audited for the Structural Timber Association’s quality standards scheme.”