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Bitumen Waterproofing Association (BWA)
BWA provides information to the European waterproofing industry about the safety, cost effectiveness and environmental benefits of bituminous membranes for waterproofing applications.
http://www.bwa-europe.com/|

British Structural Waterproofing Association (BSWA)
The British Structural Waterproofing Association seeks to improve standards within the structural waterproofing industry. Includes information on publications and members.
http://www.thebswa.plus.com/|

British Wood Preserving and Damp-proofing Association (BWPDA)
Trade body for the British timber and building preservation industry. Includes information on members and their services.
http://www.bwpda.co.uk/|