Structural Insulated Panels (SIPs)

All of the stuctural insulated panels (SIPs) used in our home extensions are produced by ourselves, in our factory in Sandy, Bedfordshire. The panels are made from two parallel faces of Orientated Strand Board (OSB) and sandwich a rigid core of expanded polystyrene.

We use SIP panels to pre-fabricate as much of our home extensions as possible before being delivered to your home or site. This way of building is widely used throughout America and Europe and is quickly gaining popularity in the UK as being the most economical way of meeting the new standards set out in Part L of the Building Regulations, which focus heavily on the consumption of fuel and power. A SIP home extension is an advanced, highly regarded, modern timber construction.

Benefits of a SIP Build

Structural Insulated Panel

  • Entirely recyclable
  • Eco Friendly
  • Excellent insulators with a U Value rating as low as 0.11 w/m2K
  • Lightweight so enable a flexibility of designs
  • Orientated Strand Board is sourced from fully sustainable forests.

Eco Friendly, Energy Efficient, Quick Construction!

A SIP home extension is constructed by seamlessly interlocking the boards and joining them with sealant and splines of OSB. This ensures that no air or heat can pass between them and therefore provides a massively insulated home extension which is environmentally friendly, cuts energy bills and greatly reduces green house emissions (CO2). You will have better control over your air quality as the structure will keep out allergens, dust and even humidity – this can be vital in controlling health issues such as asthma.

The lightweight nature of the panels reduces heavy foundation works and means that most of your home extension can be constructed in our factory and delivered to you, speeding up the whole process and minimising the waste on site – in all, up to 35% fewer raw materials are used in SIPS buildings.

Excellent Insulating Properties

SIP panels have some of the lowest U Values (measure of heat flow) of any building material, therefore giving you a SIP home extension that is massively insulated. The seamless way in which the panels are interlocked reduces the presence of cold spots so your home extension is warm and cosy; and can be made fully habitable.

Flexibility of Design

With a SIP construction we can be flexible with our designs, so you can be guaranteed an individual build that can be constructed in even the most awkward or small space. View our range of products for full details about what we can offer you.

Home Extension Company Product Range

Can’t find what you’re looking for?

We want to make the process from design through to construction as quick and easy as possible for you. If you cannot find the information that you are looking for, please in the first instance take a look at our frequently asked questions page. If this still doesn’t provide you with sufficient information, please contact our approachable team via our online contact form or by telephone on freephone 0800 779 7209.


Some examples of home extensions

Standard Extensions

Medium Extensions

Large Extensions