Insomax insulation board has been developed for use with Rayotecs’ electric ribbon underfloor heating mats under tiles. Insomax insulation boards are made up of extruded polystyrene foam, produced environmentally friendly, without the use of CFC or HCFC blowing agents, have zero Ozone Depletion Potential (ODP) and are fully recyclable. Insomax insulation boards have high thermal insulation properties, high compressive strength (30 tonnes per m2) capable of supporting long term static loading, waterproof, rot resistant, light weight/easy to handle, easily cut with a sharp knife and available in a variety of depths (Please contact the office for depth requirements of over 50mm) Insomax insulation has the same thermal conductivity (0.027W/mK) and compressive strength (300kPa) as Marmox and Aquapanel, but at a much more competitive price.