Membership Directory & Resource Guide - 2018 - 60

Home Owner FAQs - continued

My pool is being plastered/replastered. What are the industry
standards and/or guidelines and
methods for plastering a pool?

A:

The NPC Technical Manual includes industry guidelines
and recommendations that are based on the currentaccepted trade practice for swimming pool plastering in the United
States. The NPC Technical Manual is recognized and referred
to by several organizations, such as ACI, APSP, PCA, ASA, ICC,
and ANSI, as well as many regional Health Departments, and
Local, State, and Federal Agencies. The document is periodically
canvased, reviewed, and revised to update and incorporate the
latest information on common trade practice. The Technical Manual
includes a comprehensive overview of materials and application for
swimming pool plastering, to include: Aesthetics and Tolerances,
Materials Guidelines, Surface Preparations for Pool Substrates,
Common Trade Practices - Mixing and Finishing Techniques, and
General Performance Guidelines. This great resource of expertdriven information can be found on the NPC's website.

There are small-to-large 'bumps'
protruding from my pool's plaster
and/or tiles? What are these and
how can I remedy the issue?

A:

Calcium carbonate formations on the surface of a finish
coat are generally the result of the percolation of water that
is capable of dissolving or leaching cement compounds or calcium
from voids, bond failures, cracks, which is then precipitated onto
the surface. These are known throughout the industry by the slang
terms "nodules" or "calcium nodules." The actual mechanism and
source of the precipitated calcium formations can be from:
1.) a failure to achieve an adequate bond between the interior finish
coating and the substrate surface, or
2.) a prolonged 'aggressive' pool water that attacks the cement
compounds just below the finish surface (the sub-boundary zone.
Check out the NPC YouTube videos to help explain the causes
of these formations and what can be done to remedy the issue.

The Rey Perales
MEMORIAL SCHOLARSHIP

The National Plasterers Council is proud to offer
the Rey Perales Memorial Scholarship to the
children of NPC Members and their employees!
Scholarship awards are determined
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reference. This is one of the great
benefits of being an NPC member
- your membership dollars help
support this very worthy cause.

Over the past 3
years alone, we
have awarded
$29,000 in
scholarships!

NPConline.org

We EDUCATE. Genesis University® presents
courses at more than fifteen industry events
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We CERTIFY. As an IACET Accredited Provider,
Genesis University courses are developed to
ensure they meet the rigorous requirements of a
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Students who complete the required core classes
and 150 hours of education may apply to become
a part of the Society of Watershape Designers®.
We CONNECT. Once you take a GENESIS®
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Networking, socializing, business, we are all here
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Learn more or register for upcoming events at
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http://www.NPConline.org http://www.genesisuniversity.org

Table of Contents for the Digital Edition of Membership Directory & Resource Guide - 2018

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