What to Compare
Compare Spray Foam Insulation and Blown-In Insulation using r-value per inch, air sealing, attic temp. Check the exact product or local service proposal, then request matching written terms before choosing for your Florida home. Use the differences below to identify the questions that matter for your project.
Head-to-Head Breakdown
Features and considerations
- Creates conditioned attic — no hot attic problem
- Protects HVAC ducts from extreme heat
- Can eliminate need for attic ventilation
Limits and questions
- Requires professional installation
- Open-cell can absorb moisture if roof leaks
- Hard to remove or modify later
Features and considerations
- Easy to add over existing insulation
- DIY possible (blown-in kits available)
Limits and questions
- Leaves attic unconditioned (still very hot in FL summer)
- HVAC ducts still in hot attic space
- Settles over time — check coverage periodically
Side-by-Side Comparison
| Spray Foam Insulation | Blown-In Insulation | |
|---|---|---|
| R-Value per inch | R-3.7 (open cell) / R-6.5 (closed cell) | R-2.2–2.7 (fiberglass/cellulose) |
| Cost (1,500 sq ft attic) | Request an itemized quote for Spray Foam Insulation; compare the same scope and payment period. | Request an itemized quote for Blown-In Insulation; compare the same scope and payment period. |
| Air Sealing | Ask the Spray Foam Insulation provider to document air sealing for the exact offer. | Requires separate air sealing |
| Attic Temp (summer) | Conditioned (same as living space) | Ask the Blown-In Insulation provider to document attic temp for the exact offer. |
| HVAC Duct Protection | Yes — ducts in conditioned space | No — ducts still in hot attic |
| FL Utility Rebate | Ask the Spray Foam Insulation provider to document current quote and terms for the exact offer. | Ask the Blown-In Insulation provider to document current quote and terms for the exact offer. |
| Fit for your project | Ask the Spray Foam Insulation provider to document current quote and terms for the exact offer. | Ask the Blown-In Insulation provider to document current quote and terms for the exact offer. |
Frequently Asked Questions
Is spray foam worth it in Florida?
What R-value do I need in Florida?
Do Florida utility companies offer insulation rebates?
Consumer resources
Use these official resources when evaluating an offer. They provide general guidance and do not establish a winner between these options.
- FTC: checking home-repair offers and written agreements — General consumer guidance; not evidence of either brand's price or performance.
Browse Florida Insulation Listings
These public listings share the broad insulation category. Inclusion does not confirm that a business supplies the products or specialist services discussed above. Ask about the exact work, credentials and current availability before requesting a quote.