Structural timber really is a great option for selfbuild projects as it has a whole host of advantages over other building materials: it’s sustainable, economical, thermally efficient and can be constructed quickly. In short, it’s an excellent way to build! There are two main systems for self build – Timber Frame and SIPS (Structural Insulated Panel Systems). Here we look at some top tips to help you on your self build journey using structural timber.
Top tips when building with Timber Frame
Why should I purchase from a timber frame manufacturer?
It may be tempting to see whether a local builder can ‘stick-build’ your home for less than the price quoted by a timber frame manufacturer, however one of the main benefits of a timber frame is its off-site manufacture and the benefits that come with that. Prefabrication allows for controlled, precision engineering, so the frame is produced to exacting standards and in line with quality assurance procedures. It will also be designed and manufactured for speed of erection.
Do I need to engage with an architect as well?
if you’re planning to build a typical family home, you can save money by choosing a manufacturer with an in-house design service. Some offer standard design packages while others can help you design your dream home for a fraction of the cost of an architect. Some in-house design services will even work out free should you proceed with a timber-frame kit order, which can make great savings.
Will my completed home have low running costs?
High levels of thermal insulation are relatively easy to achieve with a timber frame, mainly because the core insulation layer is housed within the structure. In addition, multiple layers of insulation can be added to the structural fabric to increase thermal performance. Most timber-frame companies will offer a range of U-value options. The better ones will be happy to create a panel to meet your specific U-value requirements.
Is timber frame quicker to build than traditional methods?
A timber-frame kit can be manufactured concurrently rather than sequentially, enabling it to be delivered to site ‘just in time’ upon completion of site foundations. With just a couple of weeks required to erect the house to the wind and watertight stage, you’ll have more control over your build schedule allowing you to factor in follow-on trades soon thereafter.
Are there accredited manufacturers for timber frame?
The Structural Timber Association (STA) is the go-to trade association for information on structural timber systems in the UK. Its Quality Assurance Scheme can help you chose a timber frame supplier, confident in the knowledge that they will have been subject to a rigorous independent audit process. A list of STA members can be found at: www.structuraltimber.co.uk
Considerations when building with SIPS
Are all SIPs systems the same?
You may have already decided to build with SIPs but remember, not all SIPs systems are the same. There are plenty of systems on the market, so make sure you understand the composition of SIPs and the benefits the different options. Look at the thermal qualities and the jointing system – which is key to creating an airtight envelope – plus certifications and fire performance, strength and stability.
What are the long-term benefits?
Budget is key with any self build and it’s easy to lose sight of the long-term benefits of SIPs. Consider the speed of construction and short build programme, reduced on-site labour and plant costs, the additional floor space, ie a habitable roof space, and the increased value it brings. Look at the lifetime cost savings of a thermally efficient SIPs home and, most of all, take comfort from living in a sustainable home that you’ve built yourself.
How do I find a credible supplier?
Just like the variety of SIPs systems available, there are many suppliers offering different levels of service and product. Your supplier should demonstrate unrivalled knowledge of their product, offer a comprehensive package of design, supply, installation by certified fitters, and be members of the Structural Timber Association (STA) so you know they are accredited to the STA’s Quality Assurance Scheme.
Should I visit the manufacturing site?
After you’ve made your shortlist of suppliers, it is really important to visit their factories and meet the teams. You will quickly get a feel for the organisation and see how your new home will be designed and fabricated. Also, ask to see examples of previous projects, speak to past clients about their experience with the company and if possible visit some completed self-builds.
Is SIPs restrictive on design?
There are no limitations to SIPs designs and homes don’t have to be boxy and boring. If you, your architect or SIPs designer has vision then almost anything is possible. Consider adding value to your project with a ‘room in the roof’ or double your room height by leaving the roof space open to the apex.
Should I plan everything ahead?
It’s important to work with your provider on some upfront planning as this will ensure that things like window and door openings are suitably positioned, MVHR duct location is identified to enable correct alignment of floor joists, and any other technical complexities are identified early on. It seems like a lot of work upfront but it will ensure value engineering, precise fabrication and save time, hassle and possibly additional costs later on.
For more information on building with Timber Frame and SIPS visit www.structuraltimber.co.uk/self-build