07-27-2012, 08:07 AM
@CCR-The interesting thing about the topic you bring up is that within a certain temp range (not sure what the range is) the concrete has a certain insulatory capacity, making ambient condition swings less impactful on RH readings at 40%. Notice I say LESS! In our webinar, Howard actually alludes to information that is being reviewed that may allow for a correction factor, taking into account ambient conditions. The interesting thing about the whole topic is that you have exterior products, like garage floors and roofing material, that are specifying F2170 already. They are experiencing the same problems as the flooring industry. I do agree with CC that, at this point, I would grill the manufacturer on ambient condition requirements.