Halo® Subterra®

Perfectly Designed for Below Ground Applications

Product Benefits

  • Halo® GPS (graphite polystyrene) delivers a long-termR-5 per nominal inch*
  • Available with a thick polypropylene laminate or an extra-tough cross-woven laminate (Subterra® Plus)
  • 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
  • Built-in water-resistive barrier**

*Thermal performance claim based on a thickness of 1-1/16”.
** When seams, fasteners and edges are taped and/or sealed (see the Halo® Installation Guide).

Product Specifications

Board Size

4 ft x 8 ft
1230mm x 2460mm

Board Thickness

1.0”, 1.5”, 2.0”
26mm, 38mm, 52mm


R-5 per nominal inch
(based on thickness of 1-1/16”)

Compressive Strength psi (KPA)

16 (110) / 30 (210)

Additional thicknesses may be offered regionally.

Custom thicknesses and compressive strengths are available upon request.

Available Shipping

How can we help you?

Due to a very high volume of requests, it may take some time for us to respond. Thank you for your patience.

If you’re located in the USA, complete the form below, and we’ll be in touch as soon as possible.

If you’re a small contractor, please request Barricade from your distributor.

If you’re a homeowner, please visit our Amazon Storefront; we’re unable to respond to individual requests.