Calcium Chloride (CaCl) (ASTM F-1865) tests measure the moisture drive at the surface
in values of pounds per 1,000 Sq. Ft. over a 24 hour period. Typical moisture limits are:
- 3lbs for sheet goods, carpet tile and some epoxy flooring systems
- 5lbs for VCT
CaCl
testing needs to be conducted in normal building service conditions. Vapor drive values are highly sensitive to ambient condition
and often provide false results when conducted in un-conditioned spaces. 
