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How Many Types of Moisture Tests Before Installing Floor Coverings?

By Lewis Migliore

Before installing a floor covering over a concrete floor, it’s always best to use a moisture test to determine if the floor is dry enough. But which moisture test do you use?

Of all the moisture tests available today, the two most common are the calcium chloride (CaCl) test and the in situ relative humidity (RH) test. To play it safe, some contractors might consider using both tests. After all, excessive moisture can ruin floor coverings, break down adhesives, and lead to many other costly problems including liability.

But is it necessary to conduct two types of moisture tests? And what about the extra cost to conduct more than one test: Can this be justified? What if one test is superior to the other? It certainly would save a lot of time, money, and effort to use the better test. So let’s compare them.

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The Commercial Flooring Report is provided by Lewis Migliore, president of LGM and Associates, which offers technical flooring services, including help or guidance with a new flooring project or a failure on an existing floor. Contact him at lgmtcs@optilink.us. 

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posted on 12/20/2017