⚖️ Side-by-Side Comparison
Spray Foam vs Fiberglass Insulation
Spray foam runs $1.50-$3/sq ft; fiberglass batts run $0.50-$1/sq ft installed. Spray foam wins on R-value per inch, air sealing (2-3x more effective), and moisture resistance; fiberglass wins on cost and DIY-friendliness. Open-cell foam ($1.50-$2/sq ft) vs closed-cell ($2.50-$3.50) — closed-cell is structural, open-cell is cheaper.
Option 1
Spray Foam
Upfront Cost$1.50-$3/sq ft
LifespanSee comparison above
MaintenanceVaries
DIY FriendlyVaries
ROIVaries
Option 2
Fiberglass Insulation
Upfront Cost$0.50-$1/sq ft installed
LifespanSee comparison above
MaintenanceVaries
DIY FriendlyDIY-friendly
ROIVaries
📊 Detailed Comparison
| Feature | Spray Foam | Fiberglass Insulation |
|---|---|---|
| Upfront Cost | $1.50-$3/sq ft | $0.50-$1/sq ft installed |
| Lifespan | See comparison above | See comparison above |
| Maintenance | Varies | Varies |
| DIY Friendly | Varies | DIY-friendly |
| ROI | Varies | Varies |
Decided? Price it for your ZIP.
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🏆 Our Verdict
Both options have their strengths. Consider your budget, timeline, and long-term goals. Need help deciding? Get free quotes from local pros.
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