Alpha® has recognized the growing concerns of floor covering industry professionals which involves the condition of the subfloor and most specifically, the “invisible” moisture emission and its effect on the finished layer. According to ASTM F 1869, the moisture test is a required process for any commercial floor covering installation. Although the general contractor, the builder, or the owner should be the responsible party for random Calcium Chloride tests, a tile contractor should take the proactive steps to perform the test for the additional revenue and peace of mind.