Insulation Calculator: How Much Do You Really Need?

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Ready to calculate insulation? Use our [Insulation Calculator](/insulation-calculator) to determine your needs.

Proper insulation is one of the best investments for your home. This guide explains everything.

Understanding R-Values

R-value measures insulation's resistance to heat flow. Higher = better insulation.

Recommended R-Values by Region

| Region | Attic | Walls | Floor |

|---------|-------|-------|-------|

| Southern US | R30-R49 | R13-R21 | R19-R30 |

| Middle US | R38-R60 | R13-R21 | R25-R30 |

| Northern US | R49-R60 | R13-R21 | R25-R30 |

Types of Insulation

Fiberglass Batts

- Most common

- Easy to install

- $0.30-$0.80 per sq ft

Spray Foam

- Excellent air sealing

- $1.00-$3.00 per sq ft

- Two types: Open-cell and Closed-cell

Blown-In

- Good for attics and hard-to-reach areas

- $0.50-$1.50 per sq ft

Rigid Foam

- High R-value per inch

- Good for basements

- $0.50-$1.50 per sq ft

Calculating Your Needs

1. Measure the area to insulate

2. Determine required R-value

3. Calculate material needed

4. Don't forget vapor barriers and air sealing

Use our [Insulation Calculator](/insulation-calculator) for accurate estimates.

Energy Savings

Proper insulation can reduce heating and cooling costs by 15-30%.

Conclusion

Use our [Insulation Calculator](/insulation-calculator) to determine exactly how much insulation you need!