If you have ever seen an epoxy floor bubbling, peeling, or delaminating shortly after installation, moisture vapor transmission (MVT) is almost certainly to blame. In South Florida — where the water table is high, humidity is persistent, and concrete is constantly exposed to moisture — MVT is the single most common cause of premature epoxy flooring failure. Understanding how moisture vapor works and how to properly control it is essential for anyone investing in an epoxy floor coating.
Concrete is a porous material, and moisture from the ground below or from ambient humidity is constantly moving through it. When this moisture vapor reaches the underside of an applied coating, it creates hydrostatic pressure. If the coating does not have the bond strength or flexibility to accommodate this pressure, it fails — usually starting as small bubbles that eventually become full delamination. This can happen within months of installation if moisture is not properly addressed beforehand.
At SPF Industrial, moisture testing is never skipped. Before any coating is applied, we conduct calcium chloride tests and relative humidity probe tests to measure the moisture emission rate of the concrete. These tests tell us exactly how much moisture is present and which mitigation strategy is appropriate. For slabs with elevated moisture levels, we apply a moisture-tolerant primer or vapor barrier system specifically formulated for South Florida's conditions — blocking vapor transmission without compromising adhesion.
Contractors who skip moisture testing — or who use standard primers not rated for high-moisture environments — are setting their clients up for failure. At SPF Industrial, we have inspected and reinstalled floors that failed within a year because moisture was not properly addressed at the outset. The cost of doing it right the first time is always less than the cost of a failed floor. Call SPF Industrial and let us handle it correctly from the start.
Ready to transform your space? SPF Industrial serves all of South Florida.