Spray Foam Insulation in Fort Myers, FL

Spray foam insulation in Fort Myers does its best work in three places: under the roof deck, inside walls that may see water again, and on the steel of warehouses and metal buildings. It sprays on as a liquid, expands into gaps and cures in place, so one layer insulates and seals air. In a climate where about two-thirds of the city's 57 inches of annual rain falls in four summer months, sealing out humid air matters as much as R-value. Two foams handle different jobs.

Closed cell vs open cell

Open-cell foam is light and spongy, rated R-3.5 to R-3.7 per inch by HomeGuide, and lets water vapor pass. It seals air very well and fills rafter bays quickly, which makes it the usual pick under roof decks. Because it is vapor-open, a roof leak tends to show as a damp spot rather than staying hidden. Closed-cell foam is rigid and dense, rated R-5 to R-7 per inch, blocks vapor at normal thickness and resists water. It suits lower walls in flood-prone homes, steel buildings and spaces where moisture is constant.

Sealed attics

Most Fort Myers single-family homes have the air handler and ducts in the attic. Spraying open-cell under the roof deck and on the gables turns the attic into semi-conditioned space so ducts run through mild air. The alternative is sealing the ceiling and ducts and blowing more insulation on the attic floor. Both work; the better pick depends on the ducts, the roof and the budget. HomeGuide lists roof deck foam at $1,500 to $9,000 and a blown-in attic at $900 to $3,600 nationally, so it is worth pricing both.

Walls after flooding

Many homes near the river, the canals and the beaches had drywall cut out after Ian. With the wall open and the framing dry, closed-cell foam in the lower wall adds R-value and stands up to future water far better than batts. Fixr lists foam in existing walls at $3.15 to $7.50 per square foot and in new construction at $2.75 to $6.50.

Code targets

The Insulation Institute's summary of Florida's 2023 energy code lists Climate Zone 2 targets of R-38 for ceilings, R-13 for wood-frame walls and R-6 or R-4 continuous for mass walls. We write the planned thickness and resulting R-value on the quote for each area.

When foam is the wrong call

Foam does not fix a leak. Roof and plumbing leaks get repaired first. Framing and block must be dry before foam goes on. And on an easy-to-seal vented attic floor, blown-in usually reaches the target for less. We say so when that applies.

Prep and cure

We cover floors and furniture, mask fixtures and set up ventilation. HomeGuide advises staying out at least 24 hours while foam cures. Cured foam does not settle, so installed thickness stays put.

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