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The National Plasterers Council is the industry trade association for in-ground swimming pool and spa cementitious interior pool surface applicators, material manufacturers, suppliers and distributors.  It also includes those allied in the industry who have a need to know the who, what, why and how of surfacing over cement based substrates and the maintenance of the material – such as swimming pool and spa builders and service companies.
For over 23 years, the NPC has been the provider of sound technical practices to the industry.  The NPC Technical Manual is recognized and referred to by such industry leaders as the American Concrete Institute (ACI), Portland Cement Association (PCA), Association of Pool & Spa Professionals (APSP), Independent Pool & Spa Service Association (IPSSA), and the American National Standards Institute (ANSI).

National Plasterers Council Announces New Protocol at Cal Poly


New initiative aimed at addressing drought crisis in California


Industry-wide sponsorship and support including the California Pool and Spa Association (CPSA), The Association of Pool and & Spa Professionals (APSP), World of Recreational Water (WRW), and the Independent Pool and Spa Service Association (IPSSA)

The National Plasterers Council (NPC) is pleased to announce the initiation of a new study at the Cal Poly National Pool Industry Research Center located on the California Polytechnic State University (Cal Poly) campus. The study plans to examine water use reduction that could be realized if outdoor swimming pools are covered by different types of market available covers. Given the severity of drought California is confronted with, this potential water saving is substantial.  Just a 30 percent reduction in evaporation from California pools would save more than 10,833 acre-foot of water per year which is enough to supply a city of about a hundred thousand people. 


Alan Smith, Chairman of the NPC’s Research Committee said, “The NPC is rallying to the efforts being made in California to identify ways in which the industry and pool-owners can positively impact our state’s drought crisis.”  The study will involve daily water level measurements and weekly water chemistry readings for eight pools at the NPIRC for sixty days. Climate data including air temperature, wind speed, and rainfall collected at a weather station at Cal Poly will also be used for the study.


Several companies and associations have rallied behind the initiative by donating funds, supplies, and equipment needed to conduct the 60-day protocol. 


After the pools are prepared in June, the experiment is scheduled to begin in early July.  Dr. Misgana Muleta, Associate Professor of Civil and Environmental Engineering at Cal Poly, will be the principal investigator. Dr. Muleta will hire a graduate student who will help with water level measurement, monitoring water chemistry, and cleaning the pools.


For a full description of the protocol, objectives, timeline, and donors go to


All questions related to this release should be directed to Jeff Henderson, Executive Director, National Plasterers Council at  The National Plasterers Council is a non-profit trade association created to promote the usage of cementitious interior finishes of swimming pools, educate the industry in best practices, and provide materials to pool owners.


Reporters are invited to a media day on Tuesday, July 7th at CalPoly from 10:00 am until 12:00 to learn more about this study.   Please stop at the school Visitor Information Center at the Grand Avenue entrance to pick up a map and get directions to the pools.

Save the Date ...  NPC's 27th Annual Conference - February 10-13, 2016

Plan to join us in the City of Cowboys & Culture ... Conveniently located 17.5 miles from DFW International Airport, the city offers a range of experiences:  from NASCAR racing to rodeos, world-class museums to cowboy cuisine, boutique shopping to a Top zoo, biking to horseback riding.

Renaissance Worthington Hotel, Fort Worth, Texas


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Telephone: 847-416-7272, Secure Fax : 847-526-3993