Polyiso Board Insulation Calculator
Polyiso board is a high-R exterior insulation option, especially where thickness is limited and seams can be detailed well. Use this as early material planning only; confirm actual product datasheets and local assembly requirements.
Default material estimate
- R-value per inch: R-5.7
- Required thickness for R-20: 3.5 inches
- Order area with 10% waste: 550 sq ft
- Estimated material cost: $1,502
Material snapshot
- Category: Rigid board
- Form: Foil-faced rigid foam board
- Typical use: Exterior continuous insulation, roof insulation, and above-grade wall retrofits.
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