Problem Solving Forum

| More

March 23 - March 27, 2020

How can you determine the moisture content of a concrete block (CMU) wall, and how can you judge when the moisture level is sufficiently low to paint?

Selected Answers

From yip L C of united chemicals co pte ltd on March 25, 2020:
This is not much of a question in practical paint technology. Just feel the moisture content with your palm, and a cold surface indicates a moisture-laden concrete, which may be due to the state of cure or time of day or weather and rain. The old- fashioned test of covering an area with a plastic sheet and observing for condensation in a hour is a good one.. Paints nowadays are formulated with components that are moisture-tolerant unless the surface is literally, visibly wet.

From ARTURO ESCOBEDO of TWILIGHT SA DE CV on March 23, 2020:
 I suggest a web search for instruments manufactured by moisture-detection specialists such as Delmhorst Instruments (USA), Imko Gmbh (GE),  and Wagner Instruments (US) to name a few. These companies will recommend moisture detectors and/or meters through resistive, capacative, RF and/or sonar measuring principles. Some instruments are non-destructive tests, comparators, penetrating testers, etc. All-in-one testers are also available (penetrating+non-penetrating + % RH). ASTM F2170 provides criteria on concrete slabs but not on concrete blocks. Hopefully, you will receive a better reply than mine in this regard. I hope you can find your instrument shortly.

Please sign in to submit your answer this question    

Tagged categories: Asia Pacific; Coating Application; Concrete masonry units (CMU); EMEA (Europe, Middle East and Africa); Latin America; North America

Current PSF Question | Submit a PSF Question | Full PSF Archive

KTA-Tator, Inc. - Corporate Office

DeFelsko Corporation

SAFE Systems, Inc.

Sauereisen, Inc.

Tarps manufacturing, Inc.

Modern Safety Techniques

AWWA (American Water Works Association)

Fischer Technology Inc.


Technology Publishing Co., 1501 Reedsdale Street, Suite 2008, Pittsburgh, PA 15233

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL

The Technology Publishing Network

PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About   |   Privacy Policy   |   Terms & Conditions   |   Support   |   Site Map   |   Search   |   Contact Us