Subfloor moisture is a massive problem in commercial buildings. If a floor is installed over a concrete slab that has excessive moisture or high alkalinity, the flooring adhesive or the floor itself could be destroyed. A manufacturer's moisture warranty should be the first line of defense in the case of a flooring failure, but without comprehensive moisture testing, you may not have the evidence you need to ensure that your flooring has been installed within the guidelines of the warranty.
Here are the most important features of a concrete moisture test report based on testing conducted by a certified moisture testing professional:
- Overview of the site conditions and request for testing
A comprehensive concrete moisture test report should include background information about the building such as:
- Age of the slab
- General condition
- Existing flooring (if applicable)
- Name and position of the person who requested the testing
- Reason that tests were conducted
- A floor plan - showing the locations of each test site within the building. In the case of a flooring failure, the floor plan should also indicate the location of quality control testing sites -- where tests were conducted to determine concrete moisture levels where the flooring is intact.
- A complete photographic record - A certified concrete moisture testing field technician should document the testing site with photographs. These should include pictures of the flooring in place, both in areas where there is any indication of a flooring failure, and places where the flooring is intact. Photos should also document each of the multiple test sites.
- A report of the testing methods - This section of the testing report should offer detailed information regarding the types of tests conducted, and how many of each type of test was conducted. This should include:
- Start date and time of testing with ambient temperature and humidity.
- Finish date and time of testing with ambient temperature and humidity.
A Calcium Chloride test should report:
- Date and time kits were placed.
- The initial weight of the dish.
- Date/ and time kits were pulled.
- The fInal weight of the dish.
- Calculated MVER, equaling pounds of moisture over 24 hours over 1,000 sq. ft.
A Relative Humidity test report should include:
- Date and time the hole was drilled
- Date and time the sleeve was placed
- Date and time the probes were placed
- Date and time the probes were read.
- The RH % of the probe.
- The temp of the probe.
- Summary of the findings, with recommendations
A comprehensive summary of findings and recommendations will describe the site observation, provide a mapping diagram of alkalinity, the moisture vapor emission rate (MVER), and the internal relative humidity. In addition, and an overall risk assessment and repair options. The recommendations section of the report should include the recommended next steps, as well as recommended products, complete with specifications for their use.
A concrete moisture testing report should, at minimum, adhere to the ASTM test standards for the exact requirements for testing documentation, which can be found here.
IFTI has developed a proprietary concrete moisture test documentation, risk assessment, and reporting system that exceeds industry standards. If you have a flooring problem or have questions related to concrete moisture testing, please email us at email@example.com or contact us at 800-490-3657 for a complimentary consultation.