ASTM F formally recognizes the use of in situ probes as a means of conducting relative humidity testing. In fact The Standard The In-Situ Method In-situ concrete moisture testing places sensors, or probes, inside the slab itself . This test method covers the quantitative determination of percent relative testing. The ASTM F standard represents a fundamental change in how. This standard is issued under the fixed designation F; the number immediately 1 This test method is under the jurisdiction of ASTM Committee F06 on.

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The first thing I would look at is the assembly that you are installing. The only thing we recommend is that you ensure that there is a good seal between the sensor body and stadnard concrete wall.

Thanks for the reply, Patrick. First, I have to state that F is specified for interior applications that are under consistent ambient air controls.

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Sub-grade water vapor can permeate even well-mixed and applied slabs. Once you find out the methodology they require to meet warranty, I would reach out to someone within RCI in your area to conduct the tests.

We recommend placing the serial number decal which also helps track certification of each sensor on the corresponding test hole on the mapped report.

Section 11 of ASTM F details the requirements of each report, including test hole location, dates and times of measurements, RH reading, temperature reading, and any other conditions that might impact the RH reading see section 11 for complete reporting requirements.

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If not, call their technical team and ask the questions. Many contractors use vapor barriers directly under the slab to slow moisture permeation. Your email address will not be published.


The standard provides precise guidelines for RH testing methods. In-situ probes deepen concrete moisture measurement. Use our checklist to record and report the Standad readings.

10 Guidelines for ASTM F Compliance

I would verify that the hole depths are consistent and that environmental conditions are at service conditions. With all areas of ASTM-compliant RH testing, precision is key and data integrity must also be the focus for each flooring professional.

Learn how your comment data is processed. June 8, at 1: Concrete slab moisture problems can cause floor covering delamination, peeling, blistering, staining and sweating. The test hole depth is not a fixed depth, but it must be calculated based on slab thickness and number of drying sides: Reusable sensors should be calibrated by the manufacturer at least once per year, or more often if exposed to conditions that may impact their accuracy. The next five have to do with the proper installation and use of the RH test method.

stahdard It has been believed that the change in the desiccant weight could be translated into a moisture ratio for the concrete beneath. General contractors must bear in mind two interactive processes when they are looking at construction schedules: When concrete is mixed and poured, water vapor migrates from the bottom of the slab to the surface to evaporate.

Without it, even a well-dried and functioning foundation can end up with concrete slab moisture problems. Is this acceptable or wstm the test?

In-situ concrete moisture testing places sensors, or probes, inside the slab itself. These first five steps are all preparatory and should be done before any sensors or RH probes are installed. Be sure to familiarize yourself with ASTM F and choose the best concrete moisture test method for the job.

Does the finish roof product have specifications for testing the concrete deck? Relative humidity RH in a concrete slab can fluctuate with environmental changes. We also will not be shipping on these days, but will resume shipping on Tuesday, January 2nd. Each test hole must be drilled to the depth determined at Step 5 above section 10 of ASTM F and properly prepared. As concrete dries, moisture migrates from the bottom of the slab to the surface where it can evaporate away.


We have people who use the Rapid RH on shallow pours. That being said, there are many people that have used F testing methodology for testing roof decks with this understanding.

10 Guidelines for ASTM F2170 Preparation and Testing

Jason, I appreciate this means to contact you. Thanks for the question. We use cookies for shopping cart functionality, to personalize content and ads, to provide social media features and to analyze our traffic.

How do you handle this problem? F requires three test holes for the first ft 2 and, at least, one additional hole for each additional ft 2.

Note that the liner requirements have been updated and the hole is to be fully lined to meet the ASTM standard.

At this point, if one test fails, they all fail. April 7, at 3: Preparation Confirm your test method equipment meets specifications.

Check job site conditions. Surface-based test results will fluctuate, even more, under these changes in environmental conditions.

January 9, at October 27, at In celebration of the New Year, we will be closing early at September 2, at 9: For most RH testing systems, this includes cleaning any debris out of the test hole and inserting the necessary liner in the hole. In that case, builders did not allow the slab sufficient time for concrete moisture levels to equilibrate reach equilibrium moisture content according to relative humidity RH.