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BUILDING FABRIC & EXTERIORS


Pick up the pace with SIPs


Timber Innovations’ Ian McCarthy explains why the interest in SIPs as a modern method of construction continues to grow fast


T


he UK is seeing a rapidly increasing enthusiasm among self-builders and others in the construction sector to opt for structural insulated panels (SIPs) as their primary build method.


SIPs are another “modern” method of construction that have actually been around for some time – in fact, SIPs are popular in the United States, where they have been in use for over half a century.


An advanced method of construction, SIPs offer excellent thermal performance and lightweight structural strength. SIPs use less timber than traditional timber frame and are one of the most economical and eco-friendly forms of construction.


SIPs are used in walls and roofs for residential, commercial and educational sites, providing ecologically friendly and energy efficient buildings. They are usually used in conjunction with metal web joists for upper floor systems. The structural panels are made in a continuous production process by expanding the insulation material between the two outside facings of 15 mm oriented strand board (OSB) – it is this ‘autohesively’ bonded sandwich that gives this type of SIP panel its exceptional levels of performance and robustness.


SIPs are particularly popular when it comes to creating ‘rooms in the roof’


september/october 2017


SIPs can be custom designed for each building. For example, Timber Innovations’ SIPs are produced at an in-house factory following the bespoke design and desire of customers. The end result is a building that is extremely strong, energy efficient and cost-effective.


SPEED OF CONSTRUCTION


One of the most popular reasons why customers choose timber frame is the swiftness of construction, and SIP homes go up much faster than traditionally timber-framed buildings. This in turn can relate to cost, which is of course an important factor in any self-build project. Customers appreciate the budgetary benefits to timber frame and SIPs – the swiftness of the building’s erection means you reduce both construction and labour costs, an understandably popular consideration. SIPs can also offer much more versatility than other construction materials, allowing a multitude of possibilities beyond the conventional for those still involved in the design stage. One of the spin offs of this is that it offers, for instance, more habitable living space in the finished project. For example, sloping roof panels create an open space that can maximise all opportunities for full utilisation. Where once conventional roof carpentry to create the roof space left a ‘spider’s web’ of posts and beams, SIPs offer the capability to span from ridge to eaves with, at most, one intervening horizontal beam.


This means that SIPs are proving particularly popular when it comes to creating ‘rooms in the roof’; for instance in three storey townhouses, or to simply add extra room in a one or two-storey building.


ENVIRONMENTAL CONCERNS


Another important consideration is that SIPs are one of the most environmentally


friendly methods of construction and make a significant environmental impact by reducing energy use and greenhouse gas emissions. A SIPs building provides continuous insulation, is extremely airtight, allows for better control over indoor air quality and helps save natural resources.


When compared to older construction methods, SIPs produce buildings that are generally more energy efficient, stronger, quieter and more airtight. Less air leakage means fewer drafts, fewer noise penetrations and significantly lower energy bills, thus a reduction in CO2 emissions.


Some of the other benefits which can be www.sbhonline.co.uk 47


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