Tom, I was hoping that either way, foam sheets or sprayed under the slab would act as a vapor barrier to prevent moisture wicking?
I would think it will have that effect. Spray may be better that way because of the gaps, or lack of gaps.
Rarely, but sometimes... The vapor barrier traps moisture and the slab never gets rid of it.you're on plenty of a high spot there it looks like and should be ok.
If you're using fiber mesh in the floor, make sure it's mixed on site properly, to avoid "clumps" and they don't bring it to the top with the cream, while finishing.
