I have a pier and beam house and have "rolled" fiberglass insulation between the 16" centers. Some of the insulation is falling down for two reasons, one, age,I suppose,it just wears thru the staples and falls down, and two, raccoons get in there. Is there a cheap, quick device to hold the insulation in place? I could just restaple, but it is old and probably won't hold long. I was thinking of some springy type plastic device to wedge between the 16" boards. I have checked with our local home improvement store with no luck. There is not much I can do about the raccoons except to find where they are getting in, and closing that up. Anyone have any suggestions?