Wall Insulation Calculator

Wall insulation should combine cavity R-value with continuous insulation or advanced framing so studs do not erase the upgrade. Use this as early insulation planning only; confirm local code, product data, air sealing, ventilation, and moisture control.

Default building-type estimate

  • Climate zone: 5
  • Planning target: R-30
  • R-value gap from current R-13: R-17
  • Order area with 10% waste: 1,100 sq ft
  • Estimated material cost: $1,122

Planning snapshot

  • Category: Room or assembly
  • Typical use: Above-grade exterior walls in new builds and retrofits.
  • Hot climate target: R-13
  • Mixed climate target: R-21
  • Cold climate target: R-30

R-value calculator · Wall assembly builder · Insulation savings estimator