Get accurate attic insulation project costs with tax credits, energy savings, and ROI projections.
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Enter your attic details
$1.20/ft²
Installed cost
$1.45/ft²
Installed cost
$1.60/ft²
Installed cost
$1.50/ft²
Installed cost
$2.25/ft²
Installed cost
Why expert review matters
Every calculator is reviewed by certified professionals to ensure accuracy.David Chen's Master Mason, Licensed GC certification ensures professional-grade precision.
R-30
R-38
R-38
R-49
R-49
R-60
How much does attic insulation cost?
$1,500-$3,500 for 1,000 sq ft attic
Can I add over existing insulation?
Yes, if it's dry and in good condition
What tax credits are available?
30% up to $1,200 through 2032 (25C)
Our attic insulation cost calculator accounts for your existing insulation R-value and calculates how much additional insulation is needed to reach your target. We factor in material costs, labor rates, attic complexity, and include the 30% federal tax credit (up to $1,200) in ROI calculations.
Formula
R-Value to Add = Target R - Existing R
Net Cost = Total - Tax Credit (30% up to $1,200)