Insulation costs vary widely based on the type, area being insulated, and your location. Here is a realistic breakdown of what homeowners in Southwest Florida should expect to pay in 2026.
| Type | Cost Per Sq Ft (Installed) | R-Value Per Inch | Best For |
|---|---|---|---|
| Open Cell Spray Foam | $1.00 - $2.00 | R-3.7 | Attics, walls, soundproofing |
| Closed Cell Spray Foam | $2.00 - $4.00 | R-6.5 | Crawl spaces, coastal, flood zones |
| Blown-In Fiberglass | $0.50 - $1.25 | R-2.5 | Attic floors, budget projects |
| Fiberglass Batts | $0.30 - $1.00 | R-3.1 | Interior walls, soundproofing |
| Mineral Wool (Rockwool) | $1.00 - $1.75 | R-4.0 | Fire resistance, soundproofing |
| Project | Typical Cost Range |
|---|---|
| Attic spray foam (1,500 sq ft) | $1,500 - $6,000 |
| Attic blown-in (1,500 sq ft) | $750 - $1,875 |
| Whole home (attic + walls, 2,000 sq ft) | $4,000 - $12,000 |
| Crawl space encapsulation | $2,000 - $5,000 |
| Garage insulation | $800 - $2,500 |
| Insulation removal (attic) | $1,500 - $3,000 |
Bigger area and thicker application equals higher cost. Florida code requires R-30 in attics, R-13 in walls, and R-19 in crawl spaces.
Spray foam costs more upfront but delivers higher energy savings and lasts 20+ years without replacement. Fiberglass is cheaper initially but degrades in 10-15 years in Florida humidity.
Open attics are straightforward. Cathedral ceilings, tight crawl spaces, or areas requiring old insulation removal first add cost.
If existing insulation is degraded, contaminated, or water-damaged, it needs to come out first. Budget $1-2 per sq ft for removal and disposal.
A typical Naples homeowner with poor insulation spends $900-1,400 more per year on electricity than they need to. Over 10 years, that is $9,000-14,000 in wasted energy. The cost of proper insulation is almost always less than the cost of not having it.
Every home is different. Our free thermal leak scan gives you a detailed quote based on your specific situation.
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Ideal Insulation is Southwest Florida's top-rated insulation company — serving Naples, Fort Myers, Cape Coral, and Bonita Springs since 2013. Whether you need spray foam insulation, blown-in attic insulation, or a complete insulation upgrade, our 20 certified installers get it done in a day.
Schedule your free thermal leak scan or call 239.455.2002 today.