Styrofoam™ is often used to describe expanded polystyrene (EPS) foam; however, "Styrofoam" is actually a trademarked term for closed-cell extruded polystyrene foam made for thermal insulation and craft applications. EPS foam is the correct term for any form of expanded polystyrene. Expanded Polystyrene insulation is a lightweight, rigid, closed cell insulation. EPS is available in several compressive strengths to withstand load and back-fill forces. This closed-cell structure provides minimal water absorption and low vapor permanence. It is commonly used as insulation for walls, foundations and roofing.

Benefits:

• Long-term R-Value ("R" is the resistance to heat flow)
• Sustainability
• Energy efficiency
• Constant thermal resistance
• Dimensional stability
• Measurable energy savings
• No growth of bacteria, nor will it decay over time
• Chemical inertness
• Strength
• Low cost