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Blown-In vs Spray Foam Cost Calculator (Florida)
Compare blown-in fiberglass and spray foam attic insulation cost side by side for your Florida home.
Total conditioned square footage (from your listing or tax record).
Blown-in fiberglass
Lower costSpray foam
For a standard vented attic, loose-fill is usually the lower cost per R-value. Spray foam costs more but air-seals and can create a conditioned attic — worth it when you have attic HVAC or want a sealed roof deck.
Estimates are for planning only and based on typical Central Florida homes and 2026 pricing for blown-in fiberglass. Your exact price depends on attic access, existing insulation condition, and whether removal is needed — confirmed free during your inspection.
Blown-in fiberglass and spray foam are two very different approaches. Blown-in lays loose fiberglass on the attic floor to R-38; spray foam seals the underside of the roof deck to create an unvented, conditioned attic. They also cost very differently.
This tool compares both for your home so you can see the real price gap and pick the right fit — loose-fill for cost-effective R-value, spray foam when you want air sealing or a conditioned attic.
What goes into this estimate
Blown-in fiberglass. Affordable, fast, reaches R-38 — the best value for most vented Florida attics.
Spray foam. Seals the roof deck; excellent air control but several times the cost.
The right pick. Spray foam is for specific cases (conditioned attics, attic HVAC, complex rooflines); otherwise blown-in wins on value.
Frequently asked questions
Is spray foam worth it vs blown-in insulation in Florida?
It depends on your goals. For a standard vented attic, loose-fill (fiberglass or cellulose) usually delivers the comfort and savings at a fraction of the cost. Spray foam is worth its premium when you want air sealing, a conditioned attic, attic HVAC, or a sealed roof deck.
How much more does spray foam cost than blown-in?
Spray foam typically costs several times more than blown-in fiberglass for the same attic. Use the calculator to see the gap for your home.
Which lasts longer, spray foam or fiberglass?
Both are long-lasting. Fiberglass won't degrade unless it gets wet; foam is durable but far costlier and harder to modify later.
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