Industry links

UK
Quarry Products Association www.qpa.org
Mortar Industry Association www.mortar.org.uk
The Brick Development Association (BDA) www.brick.org.uk 
Construction Products Association www.constructionproducts.org.uk
House Builders Federation www.hbf.co.uk
UK Green Building Council www.ukgbc.org

North America
USGS Aggregates information www.minerals.usgs.gov
American Concrete Pressure Pipe Association www.acppa.org  
The American Concrete Pipe Association (ACPA) www.concrete-pipe.org  
Spancrete Manufacturers' Association www.spancrete-sma.com  
National Roofing Contractors Association www.nrca.net  
National Association of Home Builders (NAHB) www.nahb.com  

Australia
Building Designers Association of Australia (BDAA) www.bdaa.com.au  
Housing Industry Association Ltd. (HIA) www.buildingonline.com.au  
The Building Designers Association of NSW (BDANSW) www.bdansw.com.au  
The Building Designers Association of Queensland (BDAQ) www.bdaq.com.au  
The Building Designers Association of South Australia (BDASA) www.bdasa.com.au  
The Royal Australian Institute of Architects (RAIA) www.raia.com.au