John writes from Dracut, Massachusetts: "I have a large unheated attic with blown in fiberglass insulation. I have placed 4x8 sheets of plywood down in a few places for storage. I am finding that condensation has formed on the underside of the plywood and that mold is developing on the plywood. Upon further investigation, I pushed back the insulation and found that there is no vapor barrier installed. Could I install an OC rolled insulation product that I could install paper side down against the heated ceiling of the second floor to minimize the moister permeating through? I know that this would not be a continuous sealed vapor barrier but it may lessen the problem."

Answer: Rolling out insulation will not stop a moisture issue. I recommend taking a comprehensive look at ventilation, air handling and the humidity level. Those factors could be causing the moisture problem.