Mineral Wool Batt Insulation Calculator

Mineral wool batts cost more than fiberglass but are dense, fire resistant, and forgiving in real-world wall cavities. Use this as early material planning only; confirm actual product datasheets and local assembly requirements.

Default material estimate

  • R-value per inch: R-4.2
  • Required thickness for R-20: 4.8 inches
  • Order area with 10% waste: 550 sq ft
  • Estimated material cost: $924

Material snapshot

  • Category: Batt
  • Form: Dense friction-fit batts
  • Typical use: Wall cavities, rim joists, sound-control partitions, and fire-resilient assemblies.

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