Hammer CalculatorInsulation & Energy
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Determine insulation quantities, R-values, vapor barriers, and energy system sizing for comfortable, efficient buildings. Whether you're upgrading attic insulation or sizing a solar array, these tools translate your project specs into accurate material and equipment needs.
Quick Tips
- Match insulation R-value to your DOE climate zone — under-insulating saves money up front but costs far more in energy bills over time.
- Don't compress batt insulation to fit a cavity; compressed batts lose R-value. Use the correct width and thickness for the cavity.
- Install a continuous vapor barrier on the warm side of insulation in cold climates to prevent moisture buildup and mold.