I have a client with a commercial refrigeration room. Above the ceiling in the room is an empty space approx 4’ high. One wall(cinder block) of this empty space has a boiler room on the other side. The boiler room is very warm at all times. There is condensation building up in the empty space, I suspect because of heat transfer through the concrete block wall. The condensation has been excessive enough to cause the insulated ceiling to get saturated and buckle. My question is:
Which side of the concrete block wall should be insulated? warm side or cold side? Comments please.