Ainsworth

Bowater

British Timber Association

Building Services Electronic Trading Group 

Department of Trade and Industry

Electrical Distribution Association 

Finning Construction

Gradus Contract Interior Solutions 

Hager

Hadley Industries 

ILevel Trus Joist

Kingspan Insulation 

Laybond Products Ltd 

LHC (London Housing Consortium)

Newey & Eyre

RMD Kwikform

Siemens Plc 

Tarmac Topblock

UCM Timber

WHS Halo

Wolseley plc