This 6 mil 10 x 100 ft polyethylene roll covers crawl space floors painting projects and agricultural plots with a single continuous sheet. The thick Pe film resists tearing against handling and heavy debris while the dark surface blocks light so it doubles as a weed barrier under decks and between raised beds. Cut to size with scissors or a utility knife for custom shapes around columns footings and posts and lay overlap seams to build a vapor barrier inside basements and crawl spaces.