Attic Insulation - Compare Costs & Get Free Quotes

Proper attic insulation is one of the most cost-effective home improvements, reducing heating and cooling costs by 10-50% depending on current insulation levels. The average homeowner spends $1,500-$3,500 for professional attic insulation installation. Upgrading from R-11 to R-38 insulation typically pays for itself within 3-5 years through energy savings.

Insulation Types and Costs

Fiberglass batt insulation costs $0.50-$1.50 per sq ft installed. Blown-in fiberglass runs $1.00-$2.50 per sq ft. Blown-in cellulose costs $1.00-$2.00 per sq ft. Spray foam insulation runs $1.50-$4.00 per sq ft but provides superior air sealing. Rigid foam board costs $1.50-$3.00 per sq ft. A 1,000 sq ft attic costs $1,000-$4,000 depending on material and desired R-value.

R-Value Recommendations

The Department of Energy recommends R-38 to R-60 for attic insulation in most US climates. Cold climates (zones 6-8) need R-49 to R-60. Moderate climates (zones 4-5) require R-38 to R-49. Warm climates (zones 1-3) need R-30 to R-38. Adding insulation over existing material is common and cost-effective. Each inch of fiberglass adds approximately R-3.2.

Air Sealing and Ventilation

Air sealing before insulating costs $300-$800 and prevents conditioned air from escaping into the attic. Attic ventilation improvements cost $300-$1,500 and prevent moisture buildup. Soffit vent installation runs $200-$600. Ridge vent installation costs $300-$600. Attic fan installation runs $250-$600. Proper air sealing can improve insulation effectiveness by 20-30%.

Average Attic Insulation Costs by State

Pricing for attic insulation varies significantly by location. Below you can explore costs in your state or find local providers in your city.

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Frequently Asked Questions