Ecowarm is a modular radiant board system comprised of grooved plywood boards laminated with aluminum designed to be used in new construction and remodeling over a sub-floor or when properly installed, over cement. The two board types in the Ecowarm system have 2 patterns; straight and combo that are laid out and installed in a pattern and attached by means of construction adhesive combined with screws or cross stapling as recommended in the Installation Manual. The pattern creates the pathway into which 1/2″ ASTM F 876-877 PEX tubing is placed. When warm water is pumped through the tubing, it then rapidly provides luxurious, silent, even heat. It can be used under almost any floor covering. Typically, the board is applied over the 80% to 90% of a project that is not under stairs or cabinets. Please download our 40 page Installation Manual which contains installation instructions and numerous floor assembly details.