Is there a “baseline” moisture level for plaster walls?
I’ve had to buy a moisture meter, shows %’age values from 0 to 2, in increments of 0.2%. Recorded ranges go from 0.2% to 1.6%. Most areas of the walls are around about 0.2 – 0.4%. So, what is an acceptable “baseline” value?
Should it be 0, although I would think there needs to be some moisture in the plaster?