Responsible Materials

Forestry Practices

The Douglas Fir veneers in a Warmboard-S Radiant Subfloor panel are harvested in Oregon in a manner that complies with the Oregon Forest Practices Act which promotes sustainable forest harvesting, protects wildlife habitats and limits clearcuts. The OSB found in our Warmboard–R panel is harvested under similar guidelines in the forests of Canada.


Formaldehyde is an organically produced substance which is naturally present in our atmosphere, all wood products, many of our foods and even human blood (which contains about 0.3 parts per million). At these very low levels it is quite safe. The concern about formaldehyde arises because some wood products are manufactured using Urea based adhesives, which can outgas substantial amounts of formaldehyde raising levels in your home, well above safe, naturally occurring levels. Warmboard uses a Phenolic based adhesive. This adhesive is extremely durable, waterproof, and contributes only trace levels of formaldehyde to your home; well below levels considered safe by the most stringent standards. The U.S. Government asserts, "phenolic resin-bonded wood products do not cause significant formaldehyde related problems." Click here to read the full APA Technical Report on Structural Wood Panels and Formaldehyde.

Wood - strong, renewable, resistant

Plywood was the first type of engineered wood. The seven plies in Warmboard-S are cross-laminated under high heat and pressure using enormously strong, water resistant adhesives. Warmboard-S panels are extremely durable, resistant to warping, shrinking or twisting, and function as a superior structural subfloor in your home. Warmboard–R is made from a similarly strong 13/16" OSB composite. From an environmental viewpoint, wood takes far less energy to produce, compared to concrete, steel, or cement. Wood is also renewable and has excellent insulation properties.

Recycled Aluminum

The top surface of a Warmboard panel is a thick plate of aluminum permanently adhered to our channeled plywood. This thick aluminum is stamped in highly sophisticated dies to match Warmboard’s modular channel pattern. The stamping process is unique to Warmboard and employs a beeswax based, water soluble, biodegradable die lubricant.  This stamping process ensures that the aluminum plate is continuous even throughout the contours of our channel pattern so that flow of heat from tubing to plate to your finish floor goods is optimized. We push our performance even further by using 1060 aluminum alloy, which contains at least 20% recycled aluminum and is the highest quality, most conductive alloy available. This elegantly engineered use of aluminum is the heart of our industry leading energy efficiency.