CPS Explained

Our Closed Panel System (CPS) has been developed for Hebhomes with Scottish company Donaldson Timber System using their Sigma® II technology.  We achieve u-values of 0.15 W/m2K as standard. This can be improved further if desired. 


The Closed Panel Build System called Sigma® II, uses double studs spaced apart with a blwn fibre insulation, providing overall stud depths of 235mm. With less material used in construction compared to solid timber and other systems, Sigma® II is both cost-effective and efficient, and reduces the risk of cold-bridging found in standard stud panels.

With BOPAS+ and BBA approval, SIGMA® II Build System offers a robust and effective solution to achieving superior levels of fabric performance. This sytem also comes with a 60 year guarantee. 

Better than Timber Frame

To summarise, our CPS product offers the following advantages over standard timber stud construction:

Superior thermal performance (U values)
Improved racking performance
Reduced thermal bridging
Reduced use of materials
Simple and rapid erection
Cost effective
Deeper wall widths

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