Subfloor moisture is one of the leading causes of flooring failure. Before any installation, it is critical to conduct standardized moisture testing on concrete, such as a Calcium Chloride test or In-Situ Relative Humidity (RH) probe test. If the moisture levels exceed the manufacturer's specified limits for the flooring product, you must employ mitigation strategies. This may include installing a moisture-mitigating primer, a high-perm vapor retarder, or an underlayment designed to manage moisture vapor transmission. Additionally, ensure that the site has a controlled HVAC environment, as external humidity can lead to board expansion or mold growth. Never ignore elevated readings; proper management is essential to protecting your flooring investment.
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What are the critical steps for subfloor moisture management?
Effective moisture management begins with concrete moisture testing and pH level verification. Use a high-quality vapor barrier or moisture-mitigating primer if levels exceed manufacturer specs, and ensure the building envelope is secure to prevent future moisture intrusion.