The EPS Advantage
Most Cost-Effective Structural Core Insulation Material
Expanded polystyrene (EPS) is the most cost-effective structural core insulation material available. Compared to other foam products, EPS has the highest R-value per dollar invested. Its R-value per inch is substantially higher than fiberglass or cellulose insulations. Unlike most insulation products the R-value of EPS increases as the temperature drops. Also, EPS is physically stable and not prone to settling like fiberglass and cellulose, which can end up with voids and reduced effectiveness. EPS provides no food value to plants, animals (including rodents) or microorganisms, so it will not rot and is highly resistant to mildew. EPS has a low melting point, which greatly facilitates on-site modifications where necessary. From an environmental standpoint EPS is the clear choice as well. It requires less energy to manufacture than other options, and is more recyclable than polyurethane or polyisocyanurate. EPS foam is expanded with pentane, which does not contribute to ozone depletion or global warming. Urethane and other foams require an HCFC-based expanding agent.
