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Floor Coating Technology 2010

You don’t need torrential spring rains to experience a moisture-laden floor.  It’s something concrete resurfacing professionals must consider throughout the year, explains Tom Lux, Florock Technical Support.

In the past, relatively primitive methods were used to determine the moisture content of concrete floors.  Most involved a tangle of plastic, sealing tape, containers of absorbent desiccant, a few extra hours for test installation, and a minimum of 72 hours before getting the first moisture reading.

Despite the effort, these methods didn’t offer much in the way of accuracy.  Worst of all, should moisture levels be unfavorable, the entire array of cumbersome tests would have to be reinstalled every few weeks until the floor was dry enough for concrete sealer.  Talk about an inefficient use of man hours!

Recent decades brought us reusable surface probes and electric moisture meters.  Originally a step in the right direction, these now outdated devices involved costly professional calibration and annoyingly slow probe equilibration at each testing point.

“Today, industrial flooring has finally entered the 21st century on the moisture issue,” says Lux.  He’s referring to Florock’s use of the patented Rapid RH® by Wagner.  The system is remarkable for its cutting edge technology, combined with good old-fashioned common sense.  Once installed, a “Smart Sensor” stays in the floor permanently. A small digital meter allows for quick readings from point to point across the floor, eliminating bothersome equilibration times and costly probe calibration.  Best of all, should additional moisture readings be necessary days or weeks later, there’s no reinstallation required – the Smart Sensors are still in place!

Proving itself to be 10X faster than other methods and more economical overall, Rapid RH is getting the industry’s stamp of approval.

Tom Lux is hoping Rapid RH will become the new standard.  “We encourage everyone to view the demonstration video (http://www.wagnermeters.com/video-install.php#) and to try Rapid RH on their next job.  That’s why we make our in-house kit available to customers free of charge. Simply call to reserve your time slot at 1-800-FLOROCK!”

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We offer commercial floor coating systems.

  • Can anyone tell me how to convert RH testing results to a calcium chloride type result number such as 6lbs per 1000etc?

    Let me know, I have customers familar with the typical 3lbs, 6lbs etc. and not familar with 96% rh.

    Bob Bauer

    • Hi Bob,

      Thanks for the question. High calcium chloride tests do not always result in high relative humidity tests and low calcium chloride tests do not always result in low relative humidity tests. When converting from the traditional calcium chloride standard to the more exact Relative Humidity standard, the following may be helpful:

      <75% would be equivalent to <3 lbs/sf
      76%-85% would be equivalent to 3-6 lbs/sf
      86%-90% would be equivalent to 6-12lbs/sf
      >91% we are going to want to look very closely at the floor before moving forward

      When you do have a high relative humidity test result with Wagner Rapid RH, you will be able to monitor the floor on a daily/weekly/monthly basis, and be able to see exactly what the floor is doing (drying out through its curing process, increasing moisture in the slab from an outside source, etc…). After placing the Wagner probe we recommend, if possible, leaving the site open for testing in the future for transient moisture vapor transmission after the flooring system has been placed.

      Tom Lux
      Florock Technical Service Representative

  • Interesting article. I’d love to know more on the Rapid RH. Care to write an article on this product? Thank you.