The fastest path to code R-value
Blown-in insulation fills every corner, gap, and irregular joist bay that batts leave behind, settling into a continuous blanket across the attic floor. For most existing Southwest Florida homes, it is the most cost-effective way to go from an under-insulated R-11 to R-19 up to the recommended R-49 to R-60.
Fiberglass or cellulose?
Blown-in fiberglass is light, non-combustible, and does not absorb moisture — a good fit for humid Florida attics. Cellulose is denser, made largely from recycled paper, and gives slightly higher R-value per inch. We help you choose based on your attic, budget, and goals.
Done right, not just dumped
Blowing insulation to full depth without baffles is the single most common defect we find in other contractors' work — it chokes off soffit intake and turns a ventilation system into a moisture trap. We install baffles, protect the hatch, and set depth rulers as documented verification.
Insulation costs in Southwest Florida
Installed pricing depends on square footage, target R-value, attic access, and whether old material has to come out first. Here is where installed pricing generally lands locally — and we itemize every quote so you can compare honestly.
| Material | Installed cost | R-value / inch | Service life |
|---|---|---|---|
| Blown-in fiberglass | $1.10–$2.00/sq ft | R-2.2–R-2.7 | 20–30 yrs |
| Blown-in cellulose | $1.20–$2.40/sq ft | R-3.2–R-3.8 | 20–30 yrs |
| Fiberglass batts | $0.90–$2.10/sq ft | R-3.1–R-4.3 | 25+ yrs |
| Open-cell spray foam | $1.50–$3.20/sq ft | R-3.6–R-3.8 | 80+ yrs |
| Closed-cell spray foam | $2.40–$4.90/sq ft | R-6.0–R-7.0 | 80+ yrs |
| Insulation removal | $1.10–$2.90/sq ft | — | One-time |
Southwest Florida is IECC climate zone 2A. The recommended attic target here is R-49 to R-60 — roughly 15.5 to 19 inches of blown fiberglass at settled depth. If you can see your ceiling joists across the attic, you are well below that.
Frequently asked questions
How much does blown-in insulation cost in Cape Coral?
Blown-in fiberglass runs about $1.10 to $2.00 per square foot installed and cellulose about $1.20 to $2.40, depending on target depth, access, and whether removal is needed.
How deep should blown-in insulation be in Florida?
To reach the recommended R-49 to R-60 for our climate zone, expect roughly 15.5 to 19 inches of settled blown fiberglass. If you can see your joists, you are below target.
Can you add blown-in over my existing insulation?
Often yes, if the existing material is dry and uncontaminated. If it is wet, matted, or rodent-damaged, we remove it first, air seal, then blow to depth.