- National Spa & Pool Institute
Provides education, networking, recognition, membership advocacy and professional practices to promote innovative ideas toward the future direction and growth of the profession.
- National Terrazzo & Mosaic Association, Inc.
The site of the National Terrazzo and Mosaic Association, Inc., includes links to members and affiliated organizations. Publications that articulate standards for terrazzo floor and wall systems can be downloaded, and pictures of terrazzo work can be viewed.
- National Wood Flooring Association
Nonprofit trade association represents manufacturers, distributors, retailers and installers of wood floors. Site describes benefits of wood floors and maintenance recommendations. Photo gallery and searchable database of members are provided.
- Professional Turf Maintenance
Golf Course Maintenance from course care to the administrative division, total golf course management.
- Residential Drywall Association
A non-profit trade association representing drywall contractors and their related suppliers, working within the homebuilding industry to improve standards and relationships through education, communication, cooperation and community service.
- The Builders Exchange of Central Ohio
A commercial construction trade association representing architects, engineers, general contractors, subcontractors, material suppliers, and manufacturers. Providing education and resources to improve the construction industry.
- The Institute of Plumbing
Founded in 1906, the Institute of Plumbing is the UK's professional body for plumbers and others in the plumbing industry.
- The Institution of Civil Engineers
UK-based international organisation with 80, 000 members ranging from professional civil engineers to students, a fifth of whom live outside the UK in some 140 countries.
- Timber Frame Business Council
Customer-oriented building guide and gallery of timber frame homes are highlights of this Web site for timber frame, log home and post and beam builders, home designers, architects, tool suppliers and manufacturers of structural insulated panels (SIPs).
- World Plumbing Council
The mission of the World Plumbing Council is to unite the world plumbing industry to safeguard and protect the environment and the health of nations, for the benefit of all.