The most dreaded words a flooring contractor can say to a client are “you have a moisture problem.” In laymen’s terms a moisture problem means that water vapor is passing from the ground below the building through the concrete subflooring. These vapors combine with the chemistry of concrete and over time will destroy and undermine the bond between flooring materials and concrete. Unfortunately, this type of moisture is not visible in the formof a puddle of water on the floor.
In a large, multi-chamber enclosure with a single exit bleed valve, it might take 30 min or more to remove this moisture and recover the relative humidity setpoint. If another door is opened during this time, this recovery time will be extended. In fact, during periods of frequent parts access, the desiccator may never attain the humidity setpoint, and parts could be seriously threatened.
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