Materials were selected for their low environmental impact, from renewable sources, as well as for their longevity to reduce the need for maintenance. The selection of materials also had to consider their performance in terms of energy efficiency, along with their life cycle cost.

Rockwool was the specified to insulate the cavity walls, roof and floor areas. This was selected for both its performance and environmental impact.

The table below shows U-values for the different construction elements.

 

	U-value [W/m2 K]	Description
Roof	0.21	150 mm insulation
Wall	0.24	130 mm insulation
Windows	0.78-1.4	Double low energy glazing. Triple glazing at south top floor against motorway
Floor	0.51	Building regulation

Suppliers of technology:

Windows:
Rationel Windows (UK) Ltd
7 Avonbury Business Park
Howes Lane
Bicester
Oxon OX26 2UA
Phone: +44 1869 248181
www.rationel.co.uk

Insulation:
Rockwool Ltd
Pericoed
Bridgend CF35 6NY
Phone: +44 1656 862621
e-mail: info@rockwool.co.uk
www.rockwool.com