The system has largely been seen as high specification product for sustainable housing developments, but the company is now also offering the solution for cost effective building  across the domestic and commercial property markets.

Sigma II recently received BBA certification for the closed panel system which features factory fitted fire-retardant EPS beads bonded into the panels and a service zone.

The structural studs come in either standard 89mm or 140mm solid wood or a higher performance C-stud comprising twin studs joined together to achieve greater wall depths – 195mm  or 235mm.

Sigma II is billed as providing lower preliminary site costs, lower weather dependency, improved onsite predictability, a U-value of 0.12W/m²k and a build time up to 30% faster compared with standard open panel timber frame.

The EPS insulation itself has a lambda value of 0.032W/m²k.

Sigma II is being used in the groundbreaking AIMC4 project where three of Stewart Milne Group’s properties, a terrace of homes in Preston, are scheduled to be complete in just eight weeks.  

As part of the Group’s commitment to the AIMC4 consortium, Stewart Milne Timber Systems has also used the award winning solution to build two detached homes in Portlethen, Aberdeenshire, with three further AIMC4 properties to be erected at Prestonpans, outside Edinburgh, later this month.  

The build system is also currently on site in several other public and private sector projects across the UK.       “We believe that this product has the flexibility and a range of benefits which will deliver tangible results for housing and commercial projects where speed of build and fast return on investment are essential,” said Alex Goodfellow, group managing director of Stewart Milne Timber Systems.

The EPS bead insulation bonded into the panels

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