Fiberock 1/4" x 3' x 5' Underlayment, $10.99 USD/Box, LL Flooring (Lumber Liquidators)

Fiberock is a water-resistant, eco-friendly panel designed for underlayment and tile backer needs. It boasts 97% recycled content and a uniform composition that offers strength and moisture resistance. Use it in wet or dry locations under tiles, stone, vinyl, hardwood, or laminate floors. Known for its superior tile bond, Fiberock is free from resins, adhesives, and solvents that may stain vinyl floors. It offers a smooth, paintable surface for walls and is easy to cut, fasten, and install, made in the USA. Designed for water, mold, and indentation resistance, Fiberock is ideal in new construction or remodeling, offering durable performance and exceptional tile bonding.