Subterra offers a high-performance GPS core that is laminated on both sides with a thick polypropylene film or an extra-tough cross-woven laminate (Subterra Plus).
Features
Halo® GPS (graphite polystyrene) delivers a long-term 5 per nominal inch (thermal performance claim based on a thickness of 1-1/16”)
Available with a thick polypropylene laminate or an extra-tough cross-woven laminate (Subterra® Plus)
Per the NRC's Radon Diffusion test, Subterra Plus is a radon barrier with 7 times higher radon resistance than 6 mil polyethylene membranes
Continuous GPS insulation creates a thermal break
Protects waterproofing
Exterior laminate helps drain water away from the foundation wall
It’s job site tough - withstands severe foot and equipment traffic without breaking