Rapid RH probe out of calibration?

[CC Solutions]

(07-25-2012 08:59 PM)Rubensgt40 Wrote:  Correct me if I'm wrong JD, but I assumed your point was relating to the portion of slab immediately below the probe having the upward passage of RH "blocked", so to speak, and drying slightly different to the surrounding slab?

Exactly.... Obviously if you plug the hole with a rubber stopper it will retain moisture. Conversely if you leave the hole open you will dry the slab out at the 40% deep hole you drilled.