Vapor Transmissions and Floor Coatings
Concrete epoxy floor coatings are known to be sensitive to excess moisture. How this works may be surprising to you if you have not looked into it before.
Where is the moisture coming from?
Moisture problems in concrete occur in 2 different ways- moisture content in the concrete itself, and vapor transmission from below. The moisture itself is not always an issue as many epoxies can handle higher moisture in concrete. Vapor is a problem when it is transmitted to the surface. This will occur when the vapor pressure in the concrete is higher than the air at the surface.