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Construction
Insulation Thickness
From R-value
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Parameters
Results
- Thickness
- 7.5 in
US R-value units. Metric insulation uses different R definitions.
How it works
Find required insulation thickness to achieve a target R-value for a given material.
Who it's for: Homeowners and contractors selecting insulation for walls, attics, or floors.
R-value measures thermal resistance — higher R means better insulation.
Thickness = R-value × thermal conductivity (k) for the chosen material.
Uses US R-value units (ft²·°F·hr/BTU).
How to use
- Enter the target R-value from local energy code or product specs.
- Enter Thermal conductivity (k) from the insulation label in BTU·in/(hr·ft²·°F).
- Read Thickness in inches for the required layer depth.