measurement in a cold slab

[Noweare]

Thanks for the replies guys. Reading through some of the threads on this forum
shows that this moisture thing isn't as straight forward as I would like There seems
to be many variables involved besides just a simple measurement.

I am a contractor and I was doing this to try to protect me from installing where I shouldnt and
save the customer possible problems if it fails.

I'll keep reading and hopefully I will see the forest for the trees but in the mean time I have
told the customer the enviromnment must be at operating conditons for 48 hrs before the
measurement is taken, that I do not guarantee against acts of nature (moisture) even if the
RH reading is acceptable and it's their call to go forward or not.
call to go forward or not.

Joe McCarron