It is absurd to attempt to moisture test in an unconditioned enviroment.
If the slab temp is lower than the ambient temperature the moisture will migrate into the slab, causing an increased moisture content. The HVAC may not be on but the slab temp better be about 65 degrees or higher.
Typically slab temperatures for slab on grade are around 67 - 69 degrees, where the ambient room temperatures are 72 - 75 degrees. The slab is in contact with the ground which in most instances will be 58 - 62 degrees.
Unconditioned is a term meaning uncontrolled, yet many spaces are 'controlled' by means other than operating HVAC systems.
There are companies that specilize in drying, heating and cooling buildings. the GC has to realize the monetary impact to him for nonconformance.
Ray, you are right, but the burden is placed on the installer to provide conditions conducive to flooring installation. Even though it is out of his hands!!!!
I agree, but it is way past time for change. There was a time when this did not exist, but we allowed it to happen and now its our problem.
I can agree that all the new slabs going in be warranty's by the people who place it for excessive emissions, but all the old ones out there will still continue to have problems. Even to this day the courts make installers liable for changes in slabs emissions and flooring failures. They need training too.
I don't mind testing slabs, I actually like it, it's easy money. But thats not the whole evaluation process either.