The system has been designed to eliminate air gaps between the base of the floor deck and the Under Board panel. Underboard Floating is available in four thicknesses 18mm, (shown above) 25mm, 35mm, and 50mm. Underboard panels transfer heat efficiently as they are in direct contact with the finished floor above making the system suitable for lower temperature heat sources. When the panels are in place the pipe is easily pressed into the channel piercing the foil.