This month, I'll further my previous discussions on concrete mosture emissions by detailing a "new" method of moisture testing that many feel is the best way to accurately predict the potential for moisture problems after the floor is installed. The relative humidity probe method, also known as the RH test or the "in situ" test, has been in use in Europe for more than 20 years but is relatively new to the United States.
The relative humidity probe method, also known as the RH test or the "in situ" test, has been in use in Europe for more than 20 years but is relatively new to the United States. ASTM F2170-02, Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using In Situ Probes, which was published as an ASTM Standard in 2002, involves drilling approximately 2-inch-deep holes in the concrete to measure the humidity inside.