Underlayment

Felt550® Has Two Significant Uses In A Crawl Space Puncture Strength The Felt550® is made from virgin Polypropylene and woven into an lightweight and extremely puncture resistant material. There is no organic material used when making this product so it will naturally resist mold and mildew growth. In fact, the Felt550® was designed and engineered to be in contact with water and the earth 100% of the time. Putting all of these features together makes it perfect to use under a crawl space liner...