How to procure and deliver the integrated ‘Building Envelope’ without risk to achieving airtightness & energy efficiency:

The task is to construct buildings whose performance will not have a detrimental carbon impact on the environment. This means completing the building envelope to zero - or passive energy standards and minimising the demand for the public utilities of power, water and waste disposal.

There is significant opportunity to reduce and control the loss of energy through the fabric of the building. U-value, the measurement of loss of energy through the floor, wall and roof construction is generally recognised to be at its optimum value at c.0.10 W/m²K, although in the UK, with a more temperate climate, a U-value in the range of 0.10. – 0.15 W/m²K is acceptable. For floor and roof specifications, improved performance may be achieved relatively easily by increasing the thickness of thermal insulation, but improving the performance of walls is more problematical since the wall provides the main structure of the building as well as having to be weatherproof and cope with a variety of openings for doors, windows and various service entry points and we have achieved this level following 5 years of R&D, stringent certification testing by, BLP Systems Defects Warranties (for both treated and untreated timber) BRE(Building Research Establishment) CSH (Code for Sustainable Homes – UK  Sustainable Building Regulations) 4, 5 and 6 and the Energy Savings Trust, independent CSH 4, 5 and 6 and Zero Carbon Build system certification analysis.