Do you know what is living under your floors in the crawlspace? You might be surprised to learn that floors and ducts are dripping with moisture, mold is growing on the wood, and animals are all lurking below. If you could eliminate the moisture down there, the problem would go away. Vapor Barrier is a multi-ply nylon weave and polymer laminate. The opaque White on White eliminates unwanted translucent blotches normally seen in White on Blue barriers. A dirt crawlspace is typically saturated with moisture.  Since warm air rises, the moisture in the crawlspace will rise in the home or building.  Installing a vapor barrier provides the crawlspace with a moisture protection layer to protect the structure from the negative effects of moisture such as mold, floor failure, increased electricity costs, odors, insects, and dust mites. Moisture effects can also cause or worsen conditions such as asthma, hay fever, and/or other allergies. You are most likely spending money on utilities you could be saving if your crawlspace was sealed.  Many homeowners realize the savings when their heating bill arrives, their floors are warmer, and their homes lack that musty smell when the spring rains come.