Designed for existing floors without having to replace the floor coverings, UnderFloor mats are able to heat almost every type of flooring including wood, vinyl, or tile. The mats are simply stapled between the joists and deliver 10 watts per square foot of floor area. They are manu-factured in 12- and 16-inch widths and multiple lengths. Watts SunTouch. 888-432-8932.