Does insulation absorb water?
Yes. Insulation actually acts like a wick when exposed to water. INSULATION SHOULD NOT BE USED AS A CLOSURE UNDER PANEL ENDS. It is especially important to cut your insulation fiber glass back (you can leave the facing to fold back over the end of the insulation blanket) at the ends of panels such as the eaves and base. This is a common mistake among new installers which results in a wicking of water into the building. Be sure that you read all installation instructions.