Ovis writes from Manahawkin, New Jersey: "My rolled fiberglass insulation between my floor beams was saturated by moisture due to a ruptured water pipe. Do I have to remove the insulation or will it dry out? I seem to have good ventilation in the crawl space."

Answer: Fiberglass insulation will dry out and retain its R-Value. The concern is whether the insulation was contaminated with dirt in the water. If that is the case there could be mold issues. Fiberglass won't support mold growth but the dirt that got on the insulation along with the water could do so. If the water was clean and you are confident it will dry out quickly you can leave it in place. Otherwise, replace it with new dry insulation.