Spray Foam Insulation in Biloxi, MS

Spray foam insulation in Biloxi is mostly about keeping heat and moisture out. Biloxi's climate normals show August afternoons averaging 89.9F, July nights averaging 75.3F and about 66.8 inches of rain a year. A house with a leaky, thinly insulated attic and ducts running through it pays for that heat every month from May to October. We seal and insulate attics, crawl spaces, raised floors and metal buildings with closed-cell or open-cell foam, blown-in insulation, or both, depending on what each space needs.

The attic is the big one

On a Gulf Coast summer afternoon, attic air gets far hotter than outdoors. Most local homes have their air handler and ductwork up there. Any duct leak or thin insulation dumps that heat into the house. Two common fixes: seal the ceiling and blow in more insulation, or spray foam on the underside of the roof deck so the attic and ducts end up inside the conditioned space.

Closed cell vs open cell

Closed-cell foam is dense, about R-5 to R-7 per inch (HomeGuide), and slows water vapor. It suits raised floors, crawl space walls, metal buildings and places where moisture is a concern. Open-cell foam, about R-3.5 to R-3.7 per inch, costs less and is the common choice under roof decks in hot-humid climates. We explain which one goes where.

Code and climate zone

Harrison, Jackson and Hancock counties are in Climate Zone 2A, hot and humid. Mississippi's statewide residential energy code is voluntary, though cities including Biloxi and Gulfport have adopted their own. ENERGY STAR suggests R-49 for an uninsulated Zone 2 attic, or adding R-38 where there is already 3 to 4 inches.

Termites and foam

Formosan subterranean termites are established in Harrison, Jackson and Hancock counties, according to Mississippi State University Extension, which also notes that spray foam can hide leaks and infestations. We talk through termite inspection access before foaming sills, foundations or crawl space walls.

Spray foam insulation cost

HomeGuide's 2026 guide lists installed spray foam at $1.50 to $5.00 per square foot: open cell $1.50 to $3.50, closed cell $3.00 to $5.00. Roof deck foam runs $1,500 to $9,000 in HomeGuide's attic figures. Our price comes after we measure, and the written quote is what you pay.

Raised homes and slabs

Along the Coast you see three main foundation types: slabs, crawl spaces and raised floors on piers. Each loses energy differently. Slab homes mostly need attic work. Crawl space and raised homes need the floor sealed too, because hot, humid air sits right under it.

Choosing an insulation contractor

When you compare spray foam insulation contractors or insulation companies on the Coast, ask each for foam type and thickness by area, target R-value, how ducts and air sealing are handled, and how they treat termite inspection access. If you searched for spray foam insulation near me, we cover Biloxi, Gulfport, Ocean Springs and the towns from Bay St. Louis to Moss Point. Get a free estimate

We work across the Mississippi Gulf Coast: Biloxi, D'Iberville and Gulfport in the middle; Long Beach and Pass Christian to the west, then Diamondhead, Bay St. Louis and Waveland in Hancock County; Ocean Springs, Gautier, Pascagoula and Moss Point in Jackson County; and Vancleave and Saucier inland. Beach-side towns rebuilt heavily after Katrina, often with raised homes. Inland communities have more slab and crawl space homes on bigger lots, often with a metal shop out back.