Spray Foam Insulation in Sulphur Springs, TX

Spray foam insulation in Sulphur Springs earns its keep in July and August. The city's 1991-2020 climate normals on Wikipedia show an average daily high of 94.2F in July and 94.9F in August, a record of 115F, and about 46.5 inches of rain a year in a humid subtropical climate. That means a long cooling season with sticky air, and an attic overhead that bakes from late spring into fall. We seal and insulate attics, walls, raised floors, shops and barns with open-cell or closed-cell foam where foam is the right fit, and with blown-in cellulose or fiberglass where that gets the same comfort for less money.

Winter still counts here

Sulphur Springs is not South Texas. The same climate table lists an average January low of 34.0F and a record low of -12F, and Northeast Texas gets the occasional ice storm. A house that leaks air in August also leaks it in January, and pier-and-beam floors over open crawl spaces feel it first. Good insulation and air sealing work in both directions: they keep the AC from running all afternoon and keep pipes and floors from getting as cold during a hard freeze.

What the energy code asks for in Hopkins County

Hopkins County is in Climate Zone 3A, the warm-humid band that covers most of Northeast Texas, according to the county list kept by OpenEI. Texas set the 2015 International Residential Code, Chapter 11, as its statewide energy standard for houses starting September 1, 2016, according to the State Energy Conservation Office. Under that code, a summary from the Insulation Institute lists R-38 for ceilings in Zone 3, R-20 or R-13 plus R-5 continuous for wood-frame walls, and R-13 or R-5 continuous for crawl space walls. Cities can adopt a newer code, so we check with the local building office when a permit is involved. For existing houses, ENERGY STAR recommends R-49 in an uninsulated Zone 3 attic and R-38 added where three to four inches already sit on the floor, plus R-19 under floors.

What we see in local houses

Sulphur Springs has been the Hopkins County seat since 1871, and the 2020 census counted 6,966 housing units in the city. The housing runs from older frame homes around the square to mid-century brick ranches, newer subdivisions and homes on acreage outside town. Across the county, 68.9% of occupied homes are owner-occupied. The common problems are the same across those eras: thin or settled attic insulation, gaps around plumbing stacks, wiring, light fixtures and the attic hatch, ducts and an air handler sitting in a hot attic, and raised floors with little or nothing under them.

Closed cell vs open cell

Open-cell foam is soft and light. HomeGuide rates it at about R-3.5 to R-3.7 per inch. It expands to fill rafter bays and wall cavities, stops air well and costs less per inch, so it is the usual pick for the underside of a roof deck when we turn the attic into a sealed space. Closed-cell foam is dense and rigid, about R-5 to R-7 per inch per HomeGuide, and at normal thickness it slows water vapor and shrugs off moisture. We use it on steel walls and roofs of metal buildings, under raised floors, at rim boards and in tight spots where only an inch or two fits. Your quote names the foam for each area and the reason.

Spray foam vs blown-in for the attic

Foam is not always the answer. If the ducts are inside the house and the attic floor is open and easy to reach, sealing the ceiling and blowing cellulose or fiberglass deep across it usually costs much less per R-value. If the ducts and air handler live in the attic, which is common here, moving the insulation to the roof deck with spray foam puts that equipment inside the sealed space instead of in the heat. When both make sense, we price both side by side.

Spray foam insulation cost

HomeGuide's 2026 guide puts 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 lists a spray foam attic at $3,000 to $8,000 and a whole house at $8,000 to $20,000, and notes many crews set a minimum of $1,000 to $2,000 or more. Fixr's 2025 guide shows $3.15 to $7.50 per square foot for existing walls and $2.75 to $6.50 for new construction. Blown-in runs $1.00 to $2.80 per square foot in HomeGuide's guide. Foam is often priced by the board foot, one square foot one inch thick, so two inches over 1,000 square feet is 2,000 board feet. These are national numbers for budgeting; the figure on your written estimate is what you pay.

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Rebates to check before you sign

Oncor delivers electricity in Sulphur Springs, and Oncor says it pays incentives to participating service providers for upgrades such as added attic insulation, with residential programs usually running February through November while funds last. Use Oncor's service provider lookup to see who qualifies before the job starts. Farmers Electric Cooperative, which serves rural areas west of town, lists energy efficiency rebates for its residential members capped at $500 per membership a year; call the co-op to ask whether insulation qualifies.

How to compare insulation contractors and spray foam companies

When you get quotes from spray foam insulation contractors or other insulation companies around Sulphur Springs, ask the same questions of each one. Which foam goes where, and how many inches? What R-value does that give? How will they handle the attic vents if they seal the roof deck? What ignition or thermal barrier does the foam need where it is exposed? How long does everyone stay out while it cures? HomeGuide advises at least 24 hours. A quote that lists one total with no thickness or R-value is hard to compare, so ask for the details. Ours lists them by default.

We work in Sulphur Springs and Cumby in Hopkins County; Mount Vernon in Franklin County near Lake Cypress Springs; Winnsboro, Quitman and Yantis in Wood County around Lake Fork; Emory in Rains County; Cooper in Delta County; Commerce and Greenville in Hunt County; Mount Pleasant in Titus County; Pittsburg in Camp County; and Paris in Lamar County. The county seats hold a lot of older frame and brick houses, the lake towns hold weekend houses and cabins, and the farm country between them is full of shops, barns and metal buildings. Each town page covers what is different there.