What are SIPs?

SIPs is an acronym for Structurally Insulated Panels. Rigid polyurethane foam (the insulated core) is sandwiched between two sheets of OSB (oriented strand board). The OSB boards create the rigidity and structure and the PIR in the middle provides insulation.

This simple combination of readily available, and inexpensive building materials has created a unique alternative to the long-standing methods of building many have been used to for decades, such as brick and block. 

When were SIPs first introduced?

SIPs have been used as a building material since as early as the 1920s, but they became a lot more widespread in the latter half of the 20th century, and particularly the 70s and 80s, when energy efficiency and environmental concerns led to increased interest in more insulated building materials.

What are the benefits of using SIP panels?

One of the biggest benefits of using these prefabricated panels is undoubtedly the time it saves to build your new space. Homebuilding.co.uk have given the example of a typical two-storey 200m2 house taking just 12 days to factory fabricate the SIPs and then 12 days to erect them on site, compared with a traditional timber frame construction, which is likely to take 3-4 weeks to get the frame erected. On average they’ve estimated that building with SIPs is 55% quicker than a traditional timber frame build.

Not only are they an incredibly time-efficient material to use, SIP panels are significantly cheaper to build with too.

SIPs are also extremely versatile to use and made from sustainable resources.

How can SIPs be used?

SIPs can be used to build anything from small outbuildings (such as garden rooms) to houses and extensions. Take a look at some projects made from our structurally insulated panels.

What sizes do SIPs come in?

Our SIPs come pre-fabricated to the exact dimensions you require for your project, provided they meet our minimum and maximum length and width values:

Width – 200mm (0.2m) >  1220mm (1.22m)
Length – 200mm (0.2m) > 3000mm (3m)

Panel thickness can then be selected at either 100mm, 125mm, 150mm, 175mm or 200mm. Other thicknesses can be created upon request – please contact us if you have a specific request.

Usual wall thickness for residential u-Values approved by building control are 150mm for walls and 175mm for the roof.

How do you join SIP panels together?

It couldn’t be easier! SIP panels are joined together with timber splines (which we can supply) or steel hollow splines for specialist structural elements.

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55% quicker than conventional construction methods

Up to 50% more cost effecive when compared to bricks and mortar

Full design and build services offered too

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