In below-ground construction, water and vapour ingress can quietly undermine your project—reducing insulation efficiency and threatening structural integrity. When condensation forms inside open-cell insulation, the risks multiply: lost thermal performance, mold growth, and even structural damage.

That’s why choosing the right insulation matters. FOAMGLAS® cellular glass delivers a closed-cell, vapour-tight barrier that stays strong—even under groundwater pressure—so your building performs as intended for decades.

Explore our Below Ground White Paper to see how FOAMGLAS® insulation helps you tackle moisture, load, and durability challenges where insulation simply cannot be replaced once installed.