DOW 4X8 1" FOAM (R-5) (Model Square Edge 1 in. x 4 ft. x 8 ft.)

DuPont™ Styrofoam™ Brand Square Edge Extruded Polystyrene (XPS) Insulation is a grey, extruded polystyrene foam (XPS) insulation board that provides continuous insulation over steel stud or wood framing, in masonry unit cavity walls, conventional roofs and meets the needs of the commercial foundation and building floor slab needs. It can also be used for attics, foundations/slabs and crawl spaces in residential applications. With more than 60 years of proven performance in wet environments, the closed-cell structure of Styrofoam™ Brand Square Edge XPS Insulation resists water pickup, enabling it to retain a high R-value over time – a necessary property in wet, below-grade commercial foundation and commercial roofing applications. Styrofoam™ Brand Square Edge XPS Insulation is classified as a Type IV product when tested in accordance with ASTM C578 and provides a long term insulating performance of R-5 per inch.

Key Features

• Easy to handle, cut using a utility knife or serrated blade, and install.
• Comes in a wide selection of sizes and thicknesses.
• Designed to help ensure energy efficiency and minimize on-site cutting and waste.
• Provides a secondary barrier against groundwater leakage.
• Helps protect foundation damp proofing and waterproofing, especially during backfilling.
• Minimizes the freeze-thaw cycling of the foundation, reducing the potential for cracking.
• Will not corrode, rot or support mold growth.
• Has a minimum compressive strength of 25 psi and a flexural strength of 50 psi.
• Resistant to degradation from soil components and will retain insulating performance characteristics after prolonged exposure to moisture.

Specifications

• Thickness: 1 in.
• Width: 4 ft.
• Length: 8 ft.
• R-Value: 5
• Edge treatment: Square Edge
• Type: Extruded polystyrene (XPS) insulation, Type IV (ASTM C578)
• Long-term insulating performance: R-5 per inch
• Color: Grey
• Compressive strength: 25 psi, min. (ASTM D1621)
• Flexural strength: 50 psi, min. (ASTM C203)
• Water absorption: 0.1% by volume, max. (ASTM C272)
• Water vapor permeance: 1.5 perm, max. (ASTM E96, based on 1" thickness)
• Surface burning characteristics: Flame Spread ≤ 25, Smoke Developed ≤ 450 (UL 723)

Item Documents

• Official product page: https://www.dupont.com/products/styrofoam-brand-square-edge.html
• Official product information sheet: https://www.dupont.com/content/dam/dupont/amer/us/en/performance-building-solutions/public/documents/en/styrofoam-brand-square-edge.pdf