Open cell and closed cell, applied where each works

Spray Foam Insulation in Naples, FL

Foam that seals air leaks and insulates in one step, chosen for Naples heat and moisture.

Free on-site estimates
Written quote with foam type, thickness and R-value for each area
Roof leaks, moisture and old ductwork checked before anything is covered

What Spray Foam Insulation Does in a Florida House

Spray Foam Insulation goes on as a liquid, expands in seconds and cures into a layer that both insulates and stops air movement. That second part matters in Naples. Fiberglass batts and loose-fill slow heat, but humid outdoor air passes right through them. Foam closes the gaps around top plates, wiring holes, can lights and the joints where walls meet the roof, so less hot, wet air finds its way into the house.

Open cell

Open-cell foam rates roughly R-3.5 to R-3.7 per inch. It is soft, flexible and lower in cost, and it is the usual choice for spraying the underside of a roof deck to create an unvented attic. Because it is vapor-open, a roof leak tends to show up rather than hide inside the foam.

Closed cell

Closed-cell foam rates roughly R-5 to R-7 per inch (HomeGuide). It is rigid, sheds water and acts as a vapor retarder at normal thicknesses. We use it on metal buildings, on the inside of block walls where water can be driven through in a storm, in tight spaces where every inch counts, and on surfaces that need the added stiffness.

Who needs it

Homes with the air handler and ducts in the attic, rooms that never cool down, top-floor condo units under a flat roof, garages being turned into living space, and steel buildings that drip with condensation. If your attic is open, easy to reach and has no ductwork, ask us to compare foam against air sealing plus blown-in insulation. We will price both if both make sense.

How to tell if foam is right

Signs include a second floor or back bedroom that runs several degrees warmer, an AC that runs nearly nonstop on summer afternoons, sweating supply registers, and dust lines on carpet at the walls where air is leaking. We confirm the cause on site before recommending anything. Call (239) 977-5375 or get a free estimate.

What This Covers

Ways we apply foam in Naples-area homes and buildings.

Roof deck (unvented attic)

Open-cell or closed-cell foam on the underside of the roof sheathing, bringing ducts and the air handler inside the conditioned envelope.

Attic floor and top plates

Foam to seal the ceiling plane, around can lights, chases and the hatch, often with blown-in insulation on top.

Block and frame walls

Closed cell between furring strips on concrete block, or open cell in new frame walls before drywall.

Metal buildings and garages

Closed-cell foam on steel panels and roof purlins to cut heat gain and stop condensation.

Typical Spray Foam Insulation Costs

Job	Range and source
Spray foam, installed	$1.50 to $5.00 per sq ft (HomeGuide)
Open-cell / closed-cell	$1.50 to $3.50 / $3.00 to $5.00 per sq ft (HomeGuide)
About 1,000 sq ft	$1,500 to $5,000 (HomeGuide); $3,150 to $7,500 existing home (Fixr)
Existing walls / new construction	$3.15 to $7.50 / $2.75 to $6.50 per sq ft (Fixr)
Whole house	$8,000 to $20,000 (HomeGuide); $10,000 to $30,000 (Fixr)
Typical job minimum	$1,000 to $2,000+ (HomeGuide)

National ranges from HomeGuide (2026) and Fixr (2025), not Naples quotes. Foam type, thickness, roof shape, access and prep work shift the total, and small jobs often land at a minimum charge. You pay the amount on the written estimate we hand you, nothing else.

How It Works

1. Inspect

We look at the attic or building, measure surfaces, find the ducts and air handler, and check for leaks, moisture and pests.

2. Recommend and quote

You get a written quote listing open or closed cell, thickness, target R-value and price for each area.

3. Prep and spray

We cover floors and belongings, mask fixtures, seal off the work area and apply foam in passes to the specified thickness.

4. Ventilate and walk through

The space is ventilated before you return; we then check thickness with you and clean up.

Spray Foam Insulation Questions

Is spray foam insulation worth it in Florida?

Often, when ductwork or the air handler is in the attic, because foam under the roof deck brings that equipment into conditioned space. On an open attic with nothing overhead, air sealing and blown-in insulation may give similar comfort for less. We compare the options at your house.

Which type of spray foam has the highest R-value?

Closed cell, at roughly R-5 to R-7 per inch per HomeGuide, versus about R-3.5 to R-3.7 for open cell. Open cell can still reach the target under a roof deck by going thicker, and it often costs less to get there.

Who manufactures spray foam insulation?

Several chemical companies make professional two-part spray foam systems sold to trained installers. We tell you the exact product and its data sheet on the quote, so you can look up its fire rating and R-value yourself.

How long before we can go back inside?

Manufacturers commonly call for vacating during spraying and for a ventilation period afterward, HomeGuide advises allowing 24 hours or more. We give you the time for the specific product before the job is scheduled.

Spray Foam Insulation Service Areas

Get a Spray Foam Insulation Estimate

Book a visit and get open-cell and closed-cell options priced in writing.

Call (239) 977-5375 Free Estimate