Installing tight lock rubber tiles on a concrete basement floor. The basement is dry; do I need a moisture barrier?

You don't have to use a moisture barrier under our 3/8" Tight-Lock Tiles. These rubber tiles are very durable and will not be affected by moisture issues in a basement. If your basement were to flood, all you would need to do is remove the flooring, clean it, and let it air dry. You then would be able to reinstall your flooring.