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Dow STYROFOAM 1" x 4' x 8' Square Edge XPS Insulation

Brand: Dow Mfg#: 1647
Product#: 635001647
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Styrofoam Square Edge EPS Insulation, 1 in Thick, 4 ft Width, 8 ft Length, Polystyrene Sheet, 25 psi Compressive Strength, Plastic Film Facer


  • Square edges help ensure energy efficiency and minimize on-site cutting and waste
  • Provides a secondary barrier against groundwater leakageFreeze-thaw cycling of the foundation wall is minimized, reducing the potential for cracking
  • Long-term thermal performance
  • Superior water resistance
  • Helps protect foundation damp-proofing and waterproofing, especially during backfilling
  • Helps reduce the potential for condensation


  • Brand: Dow
  • Product Line: STYROFOAM
  • Standards: ASTM C578
  • Thickness: 1 in
  • Material: Polystyrene Foam Sheet
  • Color: Blue
  • Temperature Rating: 165 deg F
  • Water Absorption: .003 %
  • Type: Square Edge
  • Length: 8 ft
  • Width: 4 ft
  • Special Features: 25 psi Compressive Strength, 50 psi Flexural Strength
  • Usage: For Commercial Foundations and Building Floor Slabs, Residential Attics, Foundations/Slabs and Crawl Spaces and Residential Applications