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These questions came from a couple who were building a new home and wanted polished concrete floors. The main floor is slab on grade, while the second level is slab on an engineered raised subfloor. There were issues during the concrete finishing, which eliminated polishing as an option.
The challenge of dealing with water in vapor form is a primary concern of Paul Frankel, president of William M. Perkins Co., a San Diego painting and coating company with an extensive project portfolio that includes decorative and protective coatings on concrete.
In our home in Houston, we have a stained concrete slab-on-grade floor covered with white powder. We had the floor tested and the white powder was identified as salts escaping and clouding the floor.
