Spray Foam Insulation in Gulfport, MS

Spray foam insulation in Gulfport has one main job: keep summer out of the house. Gulfport's 1991-2020 normals at the airport show August afternoons averaging 90.7F, July nights that only fall to about 74.9F, and around 63 inches of rain a year. Air that warm and that wet finds every gap in a ceiling, every leaky duct joint and every opening under a raised floor. We seal and insulate those spots with open-cell foam, closed-cell foam, blown-in fill or a mix, depending on what each part of the house needs.

Where the heat gets in

In most Gulfport houses the air handler and the ductwork live in the attic. On a July afternoon that attic is far hotter than the yard, so cooled air leaking from a duct seam or heat soaking through a thin layer of old batts goes straight onto your power bill. There are two common fixes. One is to seal the ceiling and blow in insulation to full depth. The other is to spray foam on the underside of the roof deck so the attic, the ducts and the air handler all end up inside the conditioned part of the house. We look at the roof, the duct layout and your budget before recommending either.

Closed cell vs open cell

Open-cell foam is soft and spongy, runs roughly R-3.5 to R-3.7 per inch according to HomeGuide, and costs less per square foot. It is a common choice under roof decks in hot, humid climates. Closed-cell foam is dense and rigid, around R-5 to R-7 per inch, and slows water vapor. It is the better pick for the underside of raised floors, crawl space walls, metal buildings and anywhere moisture is a worry. Plenty of houses get both: open cell overhead, closed cell below.

Spray foam insulation cost

HomeGuide's 2026 cost guide puts installed spray foam at $1.50 to $5.00 per square foot, with open cell at $1.50 to $3.50 and closed cell at $3.00 to $5.00. Fixr lists $3.15 to $7.50 per square foot for existing walls and $2.75 to $6.50 for new construction. Foam on a roof deck runs $1,500 to $9,000 in HomeGuide's attic figures. Those are national ranges. Your price depends on square footage, thickness, access and prep, and the number on our written quote is the number you pay.

Rebate worth checking

Mississippi Power's residential ceiling insulation rebate form lists 20 cents per square foot of insulation added in single-family homes, as long as the finished attic reaches R-38 (about 13 inches). Spray foam, cellulose and fiberglass are all listed as eligible materials. Paperwork is due within 90 days of the invoice, funding is limited and first-come, first-served, and the utility may inspect. If your power comes from Mississippi Power, ask us to write the quote so the R-value and square footage are easy to submit.

Code, climate zone and termites

Harrison, Hancock and Stone counties sit in IECC Climate Zone 2A, the hot-humid zone. Mississippi's statewide residential energy code is voluntary, but Gulfport is among the cities that adopted their own. ENERGY STAR suggests R-49 for an uninsulated Zone 2 attic, or adding about R-38 where 3 to 4 inches already exist. Mississippi State University Extension reports Formosan subterranean termites established in Harrison and Hancock counties and warns that foam can hide leaks and infestations, so we plan termite inspection access before foaming near sills and foundations.

Picking an insulation contractor

If you are comparing spray foam insulation contractors, insulation companies or whoever came up for spray foam insulation near me, ask each one the same questions. Which foam goes where, and how thick? What R-value will each area end up at? What happens to the ducts and the attic hatch? How do you handle termite inspection access? How long should we stay out of the house after spraying? A good quote answers all of that on paper. Ours does. Get a free estimate

We work from Gulfport outward: Long Beach and Pass Christian along the beach, DeLisle and Diamondhead around the Bay of St. Louis, Bay St. Louis, Waveland and Pearlington in Hancock County, Kiln up the Jourdan River, and Lyman, Saucier and Wiggins north along Highway 49. The work changes as you go. Beachfront towns rebuilt after Katrina have many raised homes with exposed floors. Older neighborhoods have attics with decades-old insulation. Inland communities like Lyman and Saucier have more slab ranch houses, acreage and metal shops. Each town page below lists what we found out about that place and what it means for insulation.