Page 2 - 2017-12-CFR Volume 111 - How Many Types of Moisture Tests - December 2017

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. The experts at LGM
specialize in consultation,
To play it safe, some contractors might consider using both tests. correction and resolution for
After all, excessive moisture can ruin floor coverings, break down flooring complaints, claims,
adhesives, and lead to many other costly problems including liability. installation and performance
issues.
But is it necessary to conduct two types of moisture tests? And what No issue is too big, too small
about the extra cost to conduct more than one test: can this be justi- or too far away for us to
fied? handle.
All ads are interactive. Just
What if one test is superior to the other? It certainly would save a lot click on the ad to enter their
of time, money, and effort to use the better test. So let’s compare website.
them.

CaCl versus In Situ RH

Our comparison will look at cost, time, and, most importantly, accu-
racy. Initially, the CaCl test appears to be cheaper than the in situ
RH test. The up-front cost for one test kit is relatively inexpensive.
But is it really cheaper?

Consider the facts. The CaCl test materials must be discarded after
each test is complete. This means new costs every time a new test
is conducted. RH testing, however, lends itself to easily setting up
multiple test sites throughout a concrete slab and then obtaining re-
peat measurements at each site, as many times as needed, with no
further test materials required.

The CaCl test is also time-consuming and labor-intensive, especially
with large concrete floors. And you know the old saying: “Time is
money.” On the other hand, RH testing saves on total materials
costs and preparatory work for flooring installers. The savings can
be substantial.

Page Layout By: Anita S. Drennon
2 Commercial Flooring Report December 2017