Dense-Pack Cellulose Insulation Calculator

Dense-pack cellulose is a strong choice for retrofit and high-R wood-framed walls when installed at the right density. Use this as early material planning only; confirm actual product datasheets and local assembly requirements.

Default material estimate

  • R-value per inch: R-3.7
  • Required thickness for R-20: 5.4 inches
  • Order area with 10% waste: 550 sq ft
  • Estimated material cost: $919

Material snapshot

  • Category: Blown-in
  • Form: Dense-packed loose-fill fiber
  • Typical use: Closed wall cavities, double-stud walls, and retrofit wall insulation.

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