Concrete moisture vapor emission is a natural constituent of any concrete slab. It may be encountered as the emission of mix water during the drying process of a new concrete slab. Concrete drying creates an emission from the slab regardless of whether the concrete slab is below, on or above grade. Moisture vapor emission from suspended concrete is often overlooked as a potential cause of floor covering failure and this specific problem may be exacerbated by the use of light-weight aggregates . Beyond the drying process, moisture vapor emission may be the result of moisture vapor transmission from sources below the slab. The moisture source can be water trapped in a blotter course over a vapor retarder or moisture from the earth passing through the slab system. The major concerns surrounding this issue have been driven by changes in floor covering adhesives and coatings, which are more sensitive to moisture and alkali attack than previous materials. More important than floor covering system failure is the concept that Sick Building Syndrome and other I.A.Q. issues often start at the floor surface and are fed by the high sustained humidity levels created by excessive concrete moisture vapor emission.
Our company specializes in sealing slabs up to 25 pounds / 100% RH that are fully warranted against failure. We install Vapor-Green FC by Advanced Moisture Control, Inc. and can offer our customers a linear chain of custody between products and application. Contact us for very competitive pricing on any size project.