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Spray Foam Insulation Cost Guide

Insulation

Professional spray foam insulation for attics, walls, crawl spaces, or rim joists. Provides superior R-value, air sealing, and moisture barrier. Reduce energy costs by up to 50%.

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Basic

Targeted spray foam for specific problem areas

$2,000
$1,000 - $3,000

Typical Scope:

  • ✓Attic or crawl space only
  • ✓500-1,000 sq ft coverage
  • ✓Open-cell foam (lower R-value)
  • ✓Rim joists or air sealing
  • ✓Basic moisture barrier
  • ✓1-2 day installation
Standard

Whole attic or walls with quality spray foam

$5,000
$3,000 - $7,000

Typical Scope:

  • ✓Full attic spray foam
  • ✓1,500-2,500 sq ft coverage
  • ✓Closed-cell foam (higher R-value)
  • ✓Walls during renovation
  • ✓Complete air sealing
  • ✓2-3 day installation
Premium

Complete home insulation package with maximum efficiency

$11,000
$7,000 - $15,000

Typical Scope:

  • ✓Whole house spray foam
  • ✓Attic, walls, and basement
  • ✓Premium closed-cell foam
  • ✓3,000+ sq ft coverage
  • ✓Maximum energy savings
  • ✓Vapor barrier & ventilation upgrades

Frequently Asked Questions

How much does insulation installation cost?

Insulation installation averages $4,500. Attic insulation costs $1.50-$3.50 per sq ft. Spray foam runs $3-$7 per sq ft. Blown-in insulation costs $1-$2 per sq ft. Proper insulation saves 15-20% on energy bills.

What type of insulation is best?

Spray foam offers highest R-value and air sealing but costs more. Blown-in cellulose is eco-friendly and cost-effective for attics. Fiberglass batts are affordable for walls. Best choice depends on location, budget, and existing insulation.

How much insulation do I need?

Recommended R-values vary by climate and location. Attics typically need R-38 to R-60. Walls need R-13 to R-21. Check local building codes. More insulation doesn't always mean better - proper installation matters most.

Can I add insulation over existing insulation?

Yes, adding insulation over existing material is common and effective. Ensure existing insulation is dry and mold-free first. Don't compress existing insulation. Use unfaced insulation for additional layers to prevent moisture trapping.

How long does insulation last?

Fiberglass and cellulose last 80-100 years if kept dry. Spray foam lasts indefinitely. However, insulation effectiveness can decline if compressed, wet, or damaged by pests. Attic insulation should be inspected every 15-20 years.

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