Spray Foam Insulation in Texarkana, TX

Spray foam insulation in Texarkana has two jobs: keeping heat out and keeping moisture under control. The 1991-2020 normals for Texarkana, Texas, show a July average high of 93.3F and about 52 inches of precipitation a year, and the Arkansas side's Webb Field station records nearly 49 inches. Summers are humid, the ground stays damp, and many local homes sit over crawl spaces where that dampness meets the floor. We seal and insulate attics, crawl spaces, walls, shops and pole barns on both sides of State Line Avenue, using open-cell or closed-cell spray foam where it is the right tool and blown-in insulation where it does the job for less.

Two states, two codes

OpenEI places Bowie and Cass counties in Texas and Miller and Little River counties in Arkansas all in Climate Zone 3A, the warm and humid band. The codes differ by state. Texas still uses the energy chapter of the 2015 International Residential Code statewide, which in Zone 3 lists R-38 for ceilings, R-20 or R-13 plus R-5 continuous for wood-frame walls, and R-19 for floors. Arkansas uses the 2009 IECC with state amendments, in effect since January 1, 2015, which lists R-30 for ceilings and R-13 for walls in Zone 3. For existing homes on either side, ENERGY STAR suggests R-49 for a bare attic, adding R-38 where three to four inches are already there, and R-19 under floors.

Crawl spaces and humidity

In a crawl space home, damp air under the house rises into the floor and the living space. Batts stapled under the floor tend to sag and fall as they soak up moisture, and ducts running through the crawl space sweat in summer. We either insulate the floor properly with closed-cell foam that does not take on water, or seal the crawl space, insulate its walls and lay a vapor barrier so the space stays drier. Which is better depends on the house, the ductwork and how wet the ground is.

Where Texarkana houses lose the most

The Texas side had 16,270 housing units in the 2020 census and the Arkansas side 13,593. The twin cities have homes from the 1870s onward: old frame houses near downtown, wartime and postwar homes built for Red River Army Depot and Lone Star Army Ammunition Plant workers, and newer subdivisions. Older homes often have little attic insulation and open framing; postwar homes often have crawl spaces with failing batts; newer homes still have gaps at attic hatches, bonus rooms and garage ceilings.

Closed cell vs open cell

Open-cell foam is soft and expands a lot. It seals air well, quiets sound and costs less per inch, and HomeGuide lists it at R-3.5 to R-3.7 per inch. It is common under roof decks when the attic is being sealed. Closed-cell foam is dense and rigid at R-5 to R-7 per inch; it slows vapor and does not soak up water. In this humid area, that makes it our usual choice for crawl spaces, rim joists, the underside of floors and metal buildings. The quote names the foam for each area.

Spray foam or blown-in in the attic

For an open attic with ducts in fair shape, sealing the ceiling and blowing in cellulose or fiberglass to R-38 or R-49 is usually the most cost-effective path. When the air handler and ducts sit in the attic, foaming the roof deck brings them into the conditioned space. We price both when both fit and say which we would choose.

Spray foam insulation cost

HomeGuide's 2026 guide lists installed spray foam at $1.50 to $5.00 per square foot, open-cell at $1.50 to $3.50 and closed-cell at $3.00 to $5.00. It puts crawl space spray foam at $2,000 to $4,000 and an attic at $3,000 to $8,000, and notes that many installers charge a minimum of $1,000 to $2,000 or more. Its crawl space encapsulation guide lists $3,000 to $15,000. Blown-in runs $1.00 to $2.80 per square foot. These national ranges help with budgeting; your space, the method and any removal set the real number, and the written estimate is what you pay.

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Questions to ask insulation contractors

When you talk to spray foam insulation contractors or insulation companies in Texarkana, ask each one the same things. What will you seal first? Which foam goes where, how thick, and what R-value does that give? How will you handle moisture in the crawl space? If the roof deck is being foamed, how are attic vents closed? Does exposed foam need a thermal or ignition barrier? How long do we stay out while it cures (HomeGuide says at least 24 hours)? Which code applies on our side of the line? A one-number bid is hard to compare; ours lists every area.

SWEPCO weatherization help

SWEPCO's weatherization page says the utility helps pay for insulation and caulking and weatherstripping through approved contractors in Arkansas, Louisiana and Texas, and that income-qualified households may get those measures at no cost. If SWEPCO is your utility, check its current program and contractor list before your job.

We work in Texarkana, Texas and Texarkana, Arkansas, and the towns around them: Nash, Wake Village, Hooks, New Boston, Redwater, Maud and De Kalb in Bowie County; Atlanta and Queen City in Cass County; Genoa and Fouke in Miller County, Arkansas; and Ashdown and Foreman in Little River County. Wartime housing near the depot, older county-seat homes, timber and farm country, and newer suburbs each bring something different, and the town pages explain what.