10 tiles of 2 x 2 lightly used DryBarrier subfloor. 40sq feet perfect for van conversion, mud room, entrance , etc. Provides air and moisture gap between concrete and flooring. New = $112 asking $50 or make an offer. https://www.drybarrier.com/ Where there is concrete, there is moisture that can cause dangerous mold and poor air quality when it comes in direct contact with your flooring. DryBarrier® subfloor system is mold and mildew resistant and provides a moisture barrier to protect and add warmth to finished basement floors on concrete slabs. Convenient and simple to install, DryBarrier® makes it easy to transform a cool, damp area into a warm, dry living space for your family.