Spray Foam Insulation in Austin - Same-Day Service, Done Right the First Time

Trusted Spray Foam Insulation for Austin Homeowners

How much Spray Foam Insulation costs in Austin, TX typically runs between $1.50 and $4.50 per board foot installed, with most whole-attic jobs landing between $4,000 and $9,000 depending on square footage and foam type. We’re Woolsey Insulation Austin, and we’ve been installing spray foam across Travis County since 2002, answering every call with a live person and putting every price in writing before work begins. Austin summers push attic temperatures past 140 degrees, and homes with fiberglass batts lose conditioned air through gaps that spray foam seals permanently. Call (361) 418-9997 to talk through your project with a real person today.

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Key Takeaways

• Spray foam in Austin runs $1.50 to $4.50 per board foot installed. Whole-attic jobs typically land between $4,000 and $9,000.
• Closed cell foam adds structural strength and acts as a vapor barrier. It’s the right call for humid climates like Austin’s.
• Every Woolsey job includes a written price before work starts. No door-step surprises, ever.
• We answer the phone 24/7 with a live person. No voicemail maze, no call-back window.
• The 365-Day Done Right Promise covers every installation in writing. If it’s not right, we make it right at no charge.

Closed Cell Spray Foam Insulation

Closed Cell Spray Foam Insulation is a dense, rigid foam that cures at about 2 pounds per cubic foot, sealing gaps airtight while adding structural strength to the surfaces it’s applied to. In Austin’s humid climate, closed cell’s built-in vapor barrier matters more than most homeowners realize – it stops moisture from condensing inside wall cavities when 100-degree outdoor air meets 72-degree conditioned air. We install closed cell from Demilec and Icynene, and a typical Austin attic job runs $2.50 to $4.50 per board foot depending on depth and accessibility. Call (361) 418-9997 for a written price before any work starts.

Where Closed Cell Earns Its Cost

Closed cell makes the most sense in Austin crawl spaces, rim joists, and unvented attics where moisture control matters as much as R-value. At R-6.5 to R-7 per inch, it delivers the highest R-value per inch of any insulation product, which matters when space is tight.

Closed Cell and Austin Building Codes

Austin’s energy code amendments require specific R-values for unvented attics, and closed cell often meets those thresholds in fewer inches than open cell. We know exactly what Austin inspectors look for because we’ve been passing their inspections for over two decades.

Open Cell Spray Foam

Open Cell Spray Foam is a softer, lighter foam that expands dramatically on contact, filling stud bays and rafter cavities with an air-sealing insulation that’s also an effective sound barrier. It’s typically the more budget-friendly option at $1.50 to $2.75 per board foot installed, and it performs especially well in Austin attic rooflines where the goal is stopping heat gain from above. The open-cell structure allows moisture to pass through and dry out, which works well in vented attics. We install open cell from Demilec and Icynene, and every job starts with a written price. Call (361) 418-9997 to discuss whether open cell fits your home.

Sound Dampening for Austin Neighborhoods

Homes in Lost Creek and Wells Branch sit close enough to neighbors that open cell’s sound absorption makes a real difference inside bedrooms and home offices. The foam’s open structure traps sound waves rather than reflecting them, which is why it’s a common choice for interior walls and media rooms.

Open Cell and Austin’s Heat

Open cell delivers around R-3.5 to R-4 per inch, so an R-38 attic roofline typically needs about 10 inches of foam. But because it expands to fill every gap and crack, the real-world performance often exceeds what the R-value alone suggests. We’ve seen open cell cut Austin summer cooling bills by 30 to 40 percent compared to fiberglass batts.

Spray Foam Insulation Contractors

Spray Foam Insulation Contractors are licensed, trained installers who apply two-part foam using specialized high-pressure equipment, and the difference between an experienced contractor and a fly-by-night crew shows up in how evenly the foam cures and how long it lasts. Woolsey Insulation Austin has been installing spray foam since 2002, and our technicians are background-checked and uniformed, so you know exactly who’s walking into your home. We work with eight leading brands – including Demilec, Owens Corning, and Johns Manville – so the material recommendation fits your house, not whatever’s on the truck. A typical Austin contract runs $4,000 to $9,000 for a whole-attic installation, and you’ll have the exact number in writing before we start. Call (361) 418-9997 to speak with someone who actually does the work.

Why Contractor Experience Matters

Spray foam is a two-part liquid that expands on contact, and if the mix ratio or temperature is off, you get shrinkage, odors, or foam that never fully cures. We’ve been called to Austin homes to redo work from less experienced crews, and the demo cost alone often exceeds what the original job should have cost. The 365-Day Done Right Promise means if our installation isn’t right within a year, we fix it at no charge, in writing.

What to Ask Any Contractor Before Hiring

Ask for a written price before work starts, ask who exactly will be on the job, and ask what happens if the foam doesn’t perform. If the answer isn’t specific and in writing, that’s a red flag. The Kingswell Guarantee gives you all three answers in writing before you commit.

Spray Foam Attic Insulation

Spray Foam Attic Insulation is applied directly to the roofline or the attic floor, creating an air seal that stops Austin’s 100-degree attic heat from radiating down into your living space. Most Austin homeowners choose between a vented attic with foam on the floor and an unvented attic with foam on the roofline, and the right answer depends on whether your HVAC equipment lives up there. A typical spray foam attic in Austin runs $4,000 to $9,000, with the exact figure depending on square footage, foam type, and access. Call (361) 418-9997 for a written quote on your attic.

Roofline vs. Floor Application

If your air handler and ductwork sit in the attic, spraying the roofline brings that entire space into the conditioned envelope, which typically cuts energy loss more than floor application alone. Homes in Shady Hollow and Bastrop with attic HVAC systems see the biggest gains from roofline foam.

Austin Heat and Attic Performance

In July and August, an uninsulated Austin attic can hit 150 degrees, and that heat forces your AC to work far harder than it should. Spray foam on the roofline keeps the attic within a few degrees of the indoor temperature, which is why so many Austin homeowners report their upstairs rooms finally cool evenly after installation.

Spray Foam Wall Insulation

Spray Foam Wall Insulation fills stud cavities airtight, stopping the air infiltration that fiberglass batts leave behind around outlets, pipes, and wall corners. In Austin’s climate, wall insulation matters most during summer, when exterior walls radiate heat inward and force your AC to run longer cycles. We install spray foam wall insulation in both new construction and existing walls (where the cavity is accessible), and costs typically run $2.00 to $3.50 per board foot installed depending on depth and accessibility. Call (361) 418-9997 for a written price.

Existing Walls vs. New Construction

Spray foam is easiest during new construction or major remodels when wall cavities are open. For existing homes, we can apply spray foam to accessible cavities during renovations, or recommend injection foam where the wall is already closed up. We’ll tell you honestly which option makes sense for your specific house.

Air Sealing Beyond R-Value

The R-value of wall insulation matters, but air leaks matter more. A wall with R-13 batts but unsealed gaps performs worse than an R-13 spray foam wall with zero air movement, because moving air wicks heat through insulation far faster than conduction does. That’s why Austin building science professionals increasingly specify foam for exterior walls.

Rim Joist Spray Foam

Rim Joist Spray Foam seals the band of wood that sits on top of your foundation wall around the entire perimeter of your home, closing one of the most leak-prone junctions in residential construction. Austin homes with basements, pier-and-beam foundations, or crawl spaces lose conditioned air through the rim joist 24/7, and closed cell foam at $2.50 to $4.50 per board foot seals it permanently while adding moisture protection. We typically complete rim joist work in a single visit. Call (361) 418-9997 for a written quote.

Why Rim Joists Leak So Much

The rim joist sits where your floor framing meets your foundation, and in most homes that junction was never sealed with anything more than a piece of fiberglass stuffed in loosely. Air moves freely through it year-round, bringing hot, humid Austin air into crawl spaces and basements in summer and dry cold air in winter.

Moisture Protection for Pier-and-Beam Homes

Many older Austin neighborhoods, including parts of Hutto Spray Foam Insulation and Kyle, were built on pier-and-beam foundations where rim joist moisture issues lead to floor rot and musty smells. Closed cell foam creates a vapor barrier that keeps that moisture out, which is why it’s our default recommendation for rim joist work in this climate.

Crawl Space Spray Foam Insulation

Crawl Space Spray Foam Insulation seals the underside of your home against Austin’s heat and humidity, particularly important in pier-and-beam houses where the floor sits above a ventilated space. Crawl spaces in Travis County hold moisture through much of the year, and that moisture works its way up through your floors, making the house harder to cool and creating that damp, stale smell. Crawl space spray foam typically runs $2.50 to $4.50 per board foot installed, with most complete crawl spaces landing between $3,000 and $8,000. Call (361) 418-9997 for a written estimate.

Encapsulation vs. Floor Insulation

You can spray foam the crawl space walls and rim joists to encapsulate the space, or spray the underside of the floor deck directly. In Austin’s climate, encapsulation usually delivers the best results because it keeps the whole crawl space dry and conditioned, which protects your floor framing from moisture damage.

Austin Humidity and Crawl Space Health

Crawl spaces in neighborhoods near Lakeway and along the Colorado River hold more moisture than homes on higher ground, and that’s exactly when closed cell spray foam earns its cost. It’s the only insulation product that both insulates and acts as a vapor barrier in one application, which is what makes it the right tool for Austin crawl spaces.

Garage Spray Foam Insulation

Garage Spray Foam Insulation seals the ceiling and walls of your garage to stop the heat that builds up there from radiating into adjacent living space. In Austin, an uninsulated garage becomes a heat sink every afternoon, and if your garage shares a wall or ceiling with conditioned rooms, you’re paying to cool that heat every night. Garage spray foam runs $1.50 to $4.50 per board foot, with most full garage applications landing between $1,500 and $4,000. Call (361) 418-9997 for a written price.

Shared Walls and Living Space Above

If you have a bedroom above the garage, like many homes in Spray Foam Insulation - Manor and Wells Branch do, spray foaming the garage ceiling transforms the comfort of that room. It’s one of the highest-return insulation projects we do, because the temperature swing in an uninsulated garage ceiling is extreme.

Garage Conversions and Home Gyms

More Austin homeowners are converting garages into workshops, gyms, and studios, and spray foam is the fastest way to make those spaces actually usable in summer. Closed cell on the garage door panels and ceiling can bring a garage from 110 degrees down to 85 or less, which is the difference between usable and unbearable.

Brands We Service

We install spray foam from Demilec and Icynene because both brands produce closed cell and open cell formulations that hold up in Austin’s heat and humidity better than most. Demilec’s closed cell foam has been a workhorse for us on rim joist and crawl space projects, where its vapor barrier performance matters most. Icynene’s open cell foam delivers consistent expansion and sound control that we’ve trusted for years on attic rooflines across Travis County.

We also work with Owens Corning and Johns Manville for complementary products like batt insulation and air sealing materials, so when a job calls for a hybrid approach, we’re not locked into one manufacturer. Whether you have spray foam from Demilec, Icynene, or any other brand, we can evaluate it and recommend the right fix. The material choice always follows the home, not the other way around.

Signs You Need a Pro Right Now

• Your upstairs rooms run 8 to 10 degrees warmer than downstairs all summer. This usually means your attic insulation isn’t sealing the roofline, and hot air is radiating down through the ceiling. Spray foam on the roofline fixes the root cause, not the symptom.
• Your AC runs constantly but the house never quite reaches the thermostat setting. Air leaks around rim joists, wall cavities, and attic hatches let conditioned air escape while pulling hot outdoor air in. Sealing those leaks with spray foam typically cuts runtime noticeably within the first month.
• You feel drafts near outlets, baseboards, or floor edges on windy days. Those drafts mean your wall cavities aren’t sealed, and air is moving through the framing itself. Spray foam wall insulation fills those cavities and stops the air movement entirely.
• Your floors feel damp or your house smells musty, especially after rain. A humid crawl space under a pier-and-beam home is usually the culprit, and it’s not going to dry out on its own in Austin’s climate. Crawl space spray foam seals the moisture out at the source.
• You can see light coming through your rim joist from inside the crawl space or basement. If light gets through, air gets through. Every gap you can see is a leak that’s been costing you money since the day the house was built.

Our Process, Step by Step

1. 1
   Call and talk to a real person. When you call (361) 418-9997, a live human answers 24/7. We’ll ask about your house, your comfort issues, and your goals, then schedule a visit at a time that works for you.
2. 2
   Get a written price before anything starts. We walk your attic, crawl space, or walls, take measurements, and hand you a written quote on the spot. That price doesn’t change when the crew shows up – it’s a fixed number in writing.
3. 3
   We show up in the promised window, uniformed and background-checked. You’ll know exactly who’s arriving and when. Our technicians arrive in company uniforms with verified identification, and we protect your floors and belongings before any work begins.
4. 4
   We install the foam and clean up completely. The two-part spray foam is applied using calibrated equipment at the right temperature and mix ratio, then we remove all debris, masking, and protective materials. Your home is left cleaner than we found it.
5. 5
   You get a written guarantee, and we stand behind it. Every installation includes the 365-Day Done Right Promise in writing. If anything isn’t right within a year, we come back and fix it at no charge. That’s the Kingswell Guarantee, and it’s on every single job.

How Much Does Spray Foam Insulation Cost in Austin?

Our Service Area Near Austin

Woolsey Insulation Austin serves the entire Austin metro area and surrounding communities, including Georgetown, Leander, Kyle, Hutto, Lakeway, Bastrop, Manor, Lost Creek, Hornsby Bend, Shady Hollow, and Wells Branch. We typically reach most Austin neighborhoods within 60 to 90 minutes, and we schedule around your availability, not the other way around. If you’re in a neighboring community, call (361) 418-9997 and we’ll tell you exactly when we can be there. You can also learn more about our Spray Foam Insulation in Georgetown and Spray Foam Insulation in Leander services if those locations are closer to you.

Frequently Asked Questions About Spray Foam Insulation in Austin

Schedule Your Spray Foam Insulation Service in Austin Today

If your Austin home is fighting the heat every summer and losing, spray foam insulation is the fix that actually solves the problem instead of patching it. Call (361) 418-9997 now and you’ll get a live person, a free written estimate, and a price that won’t change when we show up. No pressure, no surprises – just a straight answer and a written guarantee. We’re here 24 hours a day, 7 days a week.

Written by Glenn Hartley, Owner at Woolsey Insulation Austin, serving Austin since 2002. Home | Spray Foam Insulation in Austin