Affordably add the look of natural wood to your home. Today's vinyl flooring has the look and texture of real wood floors. Citadel is a floating vinyl floor which means no messy glue. Simply click each plank together to install. that's it, there is no need for underlayment. Have a spill? No problem. These floors are waterproof. This makes Citadel great for rooms where wood is not recommended such as bathrooms and kitchens. Radiant heat? Citadel is approved for use over hydronic radiant heat systems as long as there is a 1/2 inch separation from the product. Citadel must be installed in a climate controlled room and direct sunlight is not recommended as the flooring can expand in heat, putting strain on the locking system.