Trusted Spray Foam Insulation for Dallas Homeowners
Wondering how much Spray Foam Insulation costs? In Dallas it typically runs $2,100 to $7,500 for a full attic job, and most homeowners see the difference on their very next energy bill. Closed cell foam runs higher per board foot but adds structural strength, while open cell gives you more coverage per dollar and still seals Dallas heat out. We’ve been insulating attics and walls across Dallas since 2002, and our crews answer the phone at (469) 916-4622 whether it’s Tuesday afternoon or 3 a.m. during a July heat wave. If your upstairs rooms bake all summer or your AC runs nonstop, spray foam is the fix that actually holds up.
Glenn Hartley leads our Dallas team, and he’s built the whole operation around one idea: a written price before we spray a single square foot, and a 365-day promise to come back if anything isn’t right. No door-step surprises. No voicemail. Just foam that seals and a number you can call that a real person picks up.
Closed Cell Spray Foam Insulation
Closed Cell Spray Foam Insulation is the denser of the two foam types, expanding to roughly 30 times its liquid volume and hardening into a rigid barrier that stops air, moisture, and heat in one pass. Dallas homeowners choose it for unvented attics, metal buildings, and any area where humidity or flooding is a concern. We install closed cell from brands including Demilec and Icynene, and a typical Dallas closed cell attic runs $4,800 to $9,200 depending on square footage and depth. It’s the premium option, and it earns the price with an R-value near R-7 per inch plus real structural strength.
Structural Strength and Moisture Control
Closed cell adds rigidity to roof decks and walls, which matters in Dallas where spring storms and hail put real stress on framing. The foam also acts as a vapor barrier at 2 inches, blocking the humid Gulf air that creeps up from the coast and condenses in attics.
Best Applications for Closed Cell
We recommend closed cell for unvented attics, rim joists, and crawl spaces in flood-prone areas like Seagoville and Balch Springs. If your attic houses HVAC equipment or ductwork, the sealed envelope keeps that equipment from fighting 140-degree heat.
Open Cell Spray Foam
Open Cell Spray Foam is the lighter, more expansive foam that grows to nearly 100 times its liquid size and fills every crack with a soft, spongy seal. It’s the workhorse for Dallas attics and walls where you want maximum air sealing per dollar spent. We install open cell from Icynene, Demilec, and CertainTeed, and a standard Dallas open cell attic runs $2,100 to $5,400 for typical suburban homes in Far North Dallas, Garland, and Rowlett. At around R-3.7 per inch, it’s less dense than closed cell, but it seals air leaks just as completely, and air sealing is what actually moves the needle on comfort.
Maximum Coverage Per Dollar
Open cell stretches further per board foot, which makes it the right call when budget matters and the attic has plenty of venting. Most Dallas homes built before 2000 have vented attics, so open cell on the attic floor gets the job done without overbuilding.
Sound Dampening and Flex
Because open cell stays soft, it absorbs sound better than closed cell, a real benefit for homes near 635, DART rail lines, or Love Field flight paths. It also flexes with framing as the house settles, so gaps don’t reopen three years down the road.
Spray Foam Insulation Contractors
Spray Foam Insulation Contractors in Dallas range from national franchises to one-truck operations, and the difference shows up in whether the foam is mixed right, applied at the proper temperature, and backed by anyone who’ll answer the phone in six months. We’re an independently owned and operated insulation company under the Kingswell banner, serving Dallas since 2002, and every crew member is background-checked and uniformed before they walk through your door. A full attic or wall job with Woolsey runs whatever we quoted in writing, which means nothing changes when the crew arrives.
Why Contractor Choice Outweighs Brand Choice
Two crews can spray the same Icynene product and get very different results. Mix ratio, substrate temperature, and lift thickness all determine whether the foam performs, and those are contractor habits, not product features.
What to Ask Before You Hire
Get the price in writing, confirm who shows up, and ask what happens if the foam shrinks or separates. If a contractor hesitates on any of those three, that hesitation is your answer.
Spray Foam Attic Insulation
Spray Foam Attic Insulation seals the single biggest heat leak in most Dallas homes, the attic floor, where 140-degree summer air pushes down into living spaces and forces your AC to run twice as hard. We spray open cell across vented attic floors or closed cell along the roof deck for unvented setups, and the right choice depends on whether your HVAC lives up there. A typical Dallas attic job runs $2,100 to $7,500, and you’ll get the exact written number before any work starts.
Vented vs Unvented Attics in Dallas
Vented attics breathe through soffit and ridge vents, so we spray the floor and leave the vents alone. Unvented attics become conditioned space, which means spraying the roof deck and sealing every penetration where heat sneaks in.
Ductwork and Equipment Protection
If your furnace or air handler sits in the attic, spray foam keeps that equipment from roasting and losing efficiency. In Oak Cliff and University Park homes with attic HVAC, this upgrade often cuts summer bills more than any single change you can make.
Spray Foam Wall Insulation
Spray Foam Wall Insulation fills wall cavities completely, sealing the rim gaps, outlet boxes, and stud bays where fiberglass batts just sit and let air pass. We install it during remodels when walls are open, and in new construction across Dallas, Carrollton, and Duncanville - Spray Foam Insulation done right. Exterior wall retrofits run $4,000 to $9,500 for an average single-story home, and the payoff is immediate: rooms hold temperature longer and the AC cycles less.
Retrofit Wall Scenarios
When you’re already opening walls for rewiring, plumbing, or drywall repair, that’s the moment to spray foam instead of stuffing fiberglass back in. The cost difference shrinks once the wall is open, and the performance difference lasts as long as the house stands.
New Construction Wall Spraying
For additions and custom builds in Red Oak and Garland, spray foam in walls meets or beats code air-sealing requirements in one pass. Builders like it because one trade handles insulation and air sealing together.
Rim Joist Spray Foam
Rim Joist Spray Foam targets the band board that wraps the top of your foundation, a thin strip most homeowners never see that leaks air into the house from the crawl space or basement rim. In Dallas homes with pier-and-beam foundations in Oak Cliff and University Park, the rim joist is often the single worst air leak in the structure. A full rim joist treatment runs $900 to $2,400 depending on linear footage, and closed cell is the standard call because it blocks moisture along with air.
Why the Rim Joist Leaks So Much
Builders wedge fiberglass into rim joist bays and call it done, but fiberglass doesn’t stop airflow. The result is a steady draft pulling hot humid air into the crawl space and up through your floors all summer.
Closed Cell at the Rim
We spray 2 to 3 inches of closed cell into each bay, which seals the air gap and adds a moisture barrier in the same application. For pier-and-beam homes in flood-prone corners of Balch Springs, Spray Foam Insulation in Balch Springs means moisture control matters as much as the air sealing.
Crawl Space Spray Foam Insulation
Crawl Space Spray Foam Insulation seals the underside of your home against ground moisture, humidity, and the drafts that make hardwood floors cold in January and damp in June. Dallas pier-and-beam homes in University Park, Oak Cliff, and Duncanville get dramatic comfort and air quality improvements, with closed cell running $3,500 to $8,000 depending on square footage and access. The foam sticks directly to the subfloor and rim joists, turning the crawl space into a controlled zone instead of a moisture trap.
Moisture and Mold Prevention
Closed cell spray foam at 2 inches acts as a moisture barrier, keeping ground humidity from migrating into floor joists and subfloor plywood. In Dallas, where summer humidity hovers near 70%, that’s the difference between a crawl space that stays dry and one that smells musty within a year.
Access and Installation Factors
Low crawl spaces mean our crews work in tight conditions and often wear full PPE, which is standard for us and not an upcharge. We’ll walk you through the access plan during the estimate so there are no surprises on install day.
Garage Spray Foam Insulation
Garage Spray Foam Insulation turns a Dallas garage from an oven into usable space, whether you’re parking cars, running a home gym, or keeping a second fridge from working itself to death. Garage ceiling and shared-wall jobs run $1,100 to $3,800, with the higher end covering full closed cell on walls plus the ceiling cavity. Demilec and CertainTeed both make excellent garage-appropriate foam, and we’ll pick based on whether your garage is attached, detached, or converted to living space.
Shared Wall and Ceiling Sealing
The wall between garage and living space is where heat, fumes, and noise push through. We spray that wall and the garage ceiling, which stops the heat transfer that makes the room above the garage the hottest spot in the house.
Detached Garage and Workshop Setups
Detached garages in Seagoville and Red Oak benefit from closed cell on walls and ceiling, especially if you run tools or store temperature-sensitive items out there. The foam also blocks the dust and pollen that comes through unsealed framing.
Brands We Service
We install Demilec closed and open cell foam because it sprays consistently in North Texas heat and holds its expansion ratio even when substrate temperatures climb past 110 degrees. Demilec’s closed cell product is our go-to for rim joists and unvented attics where we want structural strength plus moisture resistance in the same pass.
We also work with Icynene, CertainTeed, and Rockwool products where the home calls for them. Whether you’re set on Demilec, comfortable with Icynene, or just want our honest recommendation for your specific Dallas attic, we stock and spray whichever material fits the house, not whatever happens to be on the truck that week.
Signs You Need a Pro Right Now
- Upstairs rooms run 10 degrees hotter than downstairs. That’s not a normal house quirk, it’s a thermal stack effect pulling attic heat down through gaps in your ceiling. Spray foam seals the gaps that fiberglass never could.
- Your AC runs nonstop from June through September. A properly air-sealed Dallas home lets the system cycle off. If it never shuts down, you’re cooling the attic and the outdoors, not just your living space.
- You can feel drafts near baseboards or electrical outlets. Air movement from the crawl space or rim joists pushes through wall cavities and out your outlets. A smoke pencil test during an estimate shows you exactly where, in real time.
- Dust and pollen pile up within days of cleaning. Unsealed attics and crawl spaces pull outdoor air in constantly, carrying whatever’s blooming at the moment. Sealing the envelope cuts that influx dramatically.
- Your last insulation contractor disappeared after the job. If your previous crew won’t call you back about a failing install, that’s a signal about the whole industry, and it’s exactly why we put the 365-day Done Right Promise in writing before we start.
Our Process, Step by Step
- 1
Call, text, or book online. A real person at (469) 916-4622 picks up 24/7 and gets your address up on screen. We schedule an estimate at a time that works for you, in a window we actually commit to.
- 2
On-site inspection and written quote. Glenn or one of our senior techs inspects the attic, crawl space, rim joists, and walls, and runs a blower door or smoke pencil where it helps. You get a written price before we leave, and that number is the number.
- 3
Prep day. We mask off the work area, protect flooring, and confirm access points. The crew is uniformed, background-checked, and knows exactly what the written quote covers.
- 4
Spray day. We spray the specified foam at the specified depth, watching mix ratio and temperature throughout. Every job gets the same standard: full coverage, clean edges, no shortcuts.
- 5
Walkthrough and written guarantee. We walk the space with you, show you what was sprayed, and hand you the written guarantee covering the work for 365 days. If anything’s not right in that year, we come back and fix it. No charge.
How Much Does Spray Foam Insulation Cost in Dallas?
Most Dallas spray foam jobs land between $2,100 and $7,500 for attics, $900 and $2,400 for rim joists, and $3,500 to $8,000 for full crawl space encapsulation. Closed cell runs about 40% more than open cell per square foot, but the price difference buys you higher R-value per inch, a built-in moisture barrier, and structural stiffness. The square footage of the area, the depth of foam required, access difficulty, and whether we’re removing old insulation first all move the final number.
The way to avoid overpaying in Dallas is to get a written per-board-foot or per-square-foot price and compare it across two or three local contractors who measure the same space. A free estimate from us includes the exact measurement, the recommended foam type, and the total written price. If another bid comes in lower, ask whether they’re spraying the same depth, the same foam, and whether the guarantee is in writing. Ours is, every single job, no exceptions.
Our Service Area Near Dallas
We run crews across Dallas, Garland, Arlington, Carrollton, Rowlett, Duncanville, Balch Springs, Seagoville, Red Oak, Oak Cliff, University Park, and Far North Dallas every week. Most estimates happen within one to two business days of your call, and we keep open slots for same-week installs during spring and fall when Dallas attics are actually tolerable to work in. If you’re in Arlington or Garland, we’ve got local crews who know those attics well. For the full picture on what we do, start home and see how our process works from first call to final walkthrough.
Serving Dallas, TX - Our Local Coverage Area
We’re based in the Dallas area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Spray Foam Insulation in Dallas
Spray foam insulation is a two-part liquid that expands on contact and seals gaps airtight, creating a barrier that stops air, heat, and moisture in one application. It’s sprayed as a liquid and hardens into either a rigid closed cell or a soft open cell foam, depending on the product. In Dallas homes, it’s most often applied to attics, rim joists, and crawl spaces where air leaks are worst.
Most single-attic spray foam jobs in Dallas finish in one day, including setup and cleanup. Wall retrofits and full crawl space encapsulation can take two to three days, depending on square footage and access. We confirm the timeline at the written estimate and the crew arrives in the window we agreed on.
Attic spray foam in Dallas runs $2,100 to $7,500, rim joists $900 to $2,400, and crawl spaces $3,500 to $8,000, with closed cell priced higher than open cell. The exact number depends on square footage, foam type, depth, and prep work. Call (469) 916-4622 for a free written estimate, because the price we quote is the price you pay.
Yes, we install and service Icynene and Demilec spray foam systems, along with CertainTeed and Rockwool products where they fit the application. Our crews spray whatever brand matches your home’s needs and your budget. If you have a specific brand preference, tell us at the estimate and we’ll work with it.
Yes, our phones are answered by a live person 24 hours a day, 7 days a week, and we keep emergency slots for water-damaged insulation, storm damage, and other urgent situations in Dallas. If your attic insulation is wet or compromised, call (469) 916-4622 and we’ll get someone out as fast as the schedule allows. Same-week appointments are the norm outside genuine emergencies.
Every job carries the 365-Day Done Right Promise in writing, which means if the repair or installation isn’t right within 365 days, we come back and fix it at no charge. That’s part of The Kingswell Guarantee, which also covers a written price before work, a committed arrival window, and a clean job site. If the foam fails, we return. Simple.
Clear the attic floor or work area of stored items, and keep pets and people out of the work zone during the spray and for a few hours of curing afterward. We mask off the surrounding area, protect your flooring, and handle all the setup and cleanup. You don’t need to move furniture or vacate the whole house for a typical attic job.
Schedule Your Spray Foam Insulation Service in Dallas Today
If your Dallas home is fighting the heat and losing, call (469) 916-4622 and get a written price before we spray anything. We answer live 24/7, the estimate is free, and every job comes with the 365-Day Done Right Promise in writing. Glenn Hartley and our Dallas crew will show up on time, leave the site clean, and stand behind the work for a full year. Call today and get the real number.
Written by Glenn Hartley, Owner at Woolsey Insulation Dallas, serving Dallas and surrounding communities since 2002.