Answer
May 08, 2019 - 08:46 AM
Yes Marmoleum in the three different formats can be used over radiant heat. For the Marmoleum Cinch Loc floating planks or square Forbo says "When installing over a concrete subfloor or any subfloor with underfloor heating, always cover the subfloor with a vapor barrier. The edges of the vapor barrier should extend up the walls at least 2� with a minimum overlap of 8� at the seams." For Marmoleum Sheet or Tile Forbo recommends "Forbo flooring products may be installed over radiant heated floors providing the maximum surface temperature of the substrate does not exceed 85� F (29� C) under any condition of use. To enable a secure bond of the adhesive to the substrate, the radiant heating system should be turned off, or set to the lowest temperature, for a minimum of 48 hours prior to installation of the Forbo flooring product. The temperature of the substrate must not exceed 65� F (18.3� C) during the installation of the flooring material. If necessary, an alternate heating source should be used to maintain the room temperature at a minimum of 65� F (18.3� C) prior to, during, and for 72 hours after installation. The temperature of the radiant heating system can be increased 72 hours following the installation. When raising the floor temperature, do so gradually so the substrate and flooring material can adapt to the temperature change together. A rapid temperature change could result in bonding problems."
