High-strength insulating moisture barrier for use below heated concrete floors. Can be laid with the foil side up or down.  Absolute moisture barrier keeps heat-robbing ground moisture away from the concrete.  Reduces downward heat loss by over 50%, exceeding the requirements of most HVAC load calculation programs.  Super-strong 152 psi puncture resistant material supports over 6" of concrete plus floor loads indefinitely
Total of over 16 mil extruded polyethylene film withstands rough handling by installers and finishers
Air-encapsulating, vacuum-formed bubbles result in a structure that will not delaminate
99% pure polished aluminum laminate adds a reflective benefit to the intrinsic R-Value
PET coating strengthens and protects foil against chemical erosion.