XPS vs EPS Rigid Foam Insulation: A Complete Guide for Below-Grade and Under-Slab Applications
When it comes to insulating below-grade walls, under-slab assemblies, and other challenging building conditions, few materials generate as much discussion as rigid foam insulation. Two of the most common options are extruded polystyrene (XPS) and expanded polystyrene (EPS). While both serve the same fundamental purpose of reducing thermal transfer, their performance characteristics differ significantly in […]
