What Is Warmboard?

Warmboard combines a structural subfloor and a thermodynamically sophisticated radiant panel into one simple component of your radiant heating system. Warmboard begins with a stiff, strong, 1-1/8" thick, 4' X 8' sheet of tongue and groove, weather-resistant plywood. A modular pattern of channels is cut into the top surface. A thick sheet of aluminum is stamped to match the channel pattern and is permanently bonded to each panel.

As a structural subfloor, Warmboard is stiff, strong and especially tough. It can be sawn with a Skilsaw and nailed or screwed directly to your floor joists just like any conventional subfloor. The same labor that would ordinarily install just a subfloor, installs a high performance radiant panel system, saving you time and labor from the very beginning. Other radiant heat systems are more labor intensive because they're added either above or below the subfloor. Warmboard is the subfloor.

As Warmboard is installed, the four modular panel types create an infinite variety of radiant tubing layouts to suit the needs of any home. A roll of half-inch PEX tubing (the radiant industry standard for toughness, reliability, and performance) is then easily installed into the channel to complete the hydronic circuit.