Vapor Barrier Over Concrete Floor. Just spoke with a local epoxy floor coating company and he immediately suggested RedGard as an appropriate coating if vapour control under a floating floor was desired. If your concrete passes the moisture test then plastic sheeting at least 6 mils thick will prevent moisture from getting into your laminate flooring.
I believe there are roll on vapor barrier products that you can use on concrete and then use glue down flooring on top of that. Therefore in high-humidity areas moisture will move to a relatively low-humidity area even through concrete. A moisture barrier may or may not be needed to insure good adhesion of your vinyl floor so do your homework to avoid problems later on down the road.
It helps reduce mold and condensation in buildings and is resistant to decay so it will protect against moisture.
Vapor barriers are used because while fresh concrete is poured wet its not supposed to stay that way. Youll typically need a vapor barrier if youre installing flooring over concrete. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. A concrete floor with a too high moisture content can wreak havoc on a vinyl floor.
