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Webinar Title: “Moisture Testing  Of Concrete Floor Slabs”

Webinar Sponsor: Wagner Meters

Guest Presenter: Howard Kanare, Senior Principle Scientist for CTL Group a subsidiary of the

Portland Cement Association

Webinar URL:

Wagner Meters is pleased to present their newest most comprehensive webinar about the “complete flooring system”, the interrelationship of each component as it concerns the type and management of moisture and within and finally offers a thorough examination of industry measurement standards past and present.

The basis of all information presented in this 60 minute webinar is the result of scientific studies and analysis carried out in both the United States and Europe over time. The very latest industry moisture testing accurate predictor of moisture in a concrete slab is revealed in great detail.

Section 1:  Components Of A Floor System

The multiple levels of a floor system are described along with their location and interaction with one another.  From the bottom layer, Subgrade soil to the finished flooring materials such as linoleum, wood or carpet. Also explained are the types of floors relative to the ground, those that are below grade, on grade or above grade.

This section is the foundation for future discussion in this webinar about sources of moisture and how to accurately test moisture movement over time.

Section 2:  Sources Of Moisture In A Concrete Slab

Different types of moisture are found above, below and within a concrete slab. Knowing this information helps determine which methods should be used to control and help remove moisture to the accepted level needed to finish the topical flooring installations. Failure to understand why the moisture variables are different and how moisture eventually absorbs into the air could lead to making very costly inaccurate decisions which will eventually result in flooring defects and breakdown.

Section 3: Industry Accepted Methods For Drying out Concrete Slabs

When Mother Nature takes her time drying out a concrete slab, there are remedies that can be put in place to accelerate the process both below and on the surface of the concrete. Construction schedules are tight and these processes can save a lot of man hours and yet provide the push that is needed to complete the final floor installations.

Section 4:  Identification And Analysis Of Methods For Testing For Moisture In Concrete Floors

Several industry standard moisture testing processes were evaluated as follows:

Plastic sheet and mat bond tests, hand held electrical resistance and impedance meters, using calcium chloride crystals a sealed hood or finally an RH probe inserted into the slab.

A description of each method is given along with how moisture is calculated and the limitations of each test. Knowing what results each test will reveal about moisture content in the slab will help contractors and installers better assess which option to use to achieve the most accurate outcome.

Section 5:  What is Relative Humidity And Why Test For It?

Learn the definition of relative humidity-RH as it pertains to measurement of moisture in a concrete slab.  20 years of testing shows us that it is the best indicator of the moisture content within the slab but it must be measured at the right depth using a probe in order to yield accurate results.

Section 6: Thorough Study Of RH Probes

Knowing where and how many RH probes to place in a given concrete slab is explained along with showing you the difference between single and reusable probes. The webinar instructions on how to install and properly  care for the probes is essential for the readings generated to be true and accurate. Failure to adhere to industry standards on these issues could render false results and could compromise the durability and longevity of finishing flooring materials yet to be installed.