EPS Foam Board Insulation Calculator

EPS foam board is a cost-effective rigid insulation choice when the design can tolerate more thickness. Use this as early material planning only; confirm actual product datasheets and local assembly requirements.

Default material estimate

  • R-value per inch: R-3.9
  • Required thickness for R-20: 5.1 inches
  • Order area with 10% waste: 550 sq ft
  • Estimated material cost: $1,177

Material snapshot

  • Category: Rigid board
  • Form: Expanded polystyrene rigid foam
  • Typical use: Exterior walls, roof layers, slabs, and frost-protected shallow foundations.

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