Concrete Floors and Moisture, Second Edition
Two fundamental concepts permeate this writing: the floor is part of a building envelope, but also is in itself a system comprising many elements. For a floor to function successfully, specifiers, builders, owners, and finish flooring installers all must understand the factors for floor performance, especially moisture.
In the past few years since the First Edition appeared, we have been gratified to see significantly increased dialogue between general contractors, construction managers, concrete contractors, flooring installers, and design professionals. New and improved products have been introduced including flooring adhesives, vapor retarders, and moisture suppression coatings.
New moisture test instruments are on the market due to the widespread adoption of relative humidity testing. Use of blotter/cushion layer above vapor retarders in new slabs-on-grade construction has been essentially eliminated resulting in fewer chronic problems with such slabs. However, moisture problems persist due to schedule demands, increased awareness of moisture issues, and sensitivity of some finish flooring systems.