Trusted Spray Foam Insulation for Cedar Park Homeowners
If you’re wondering how much Spray Foam Insulation costs, prices in Cedar Park typically run $1.80-$3.50 per board foot for open-cell and $3.00-$6.50 per board foot for closed-cell, with most whole-home attic jobs running $3,200-$7,800 depending on thickness and square footage. We’re usually on-site within 24-48 hours and can complete most residential spray foam projects in a single day.
We’ve sealed and insulated more than 9,000 homes since 2016, and every one started with a written price before anyone lifted a tool. With our Spray Foam Insulation in Cedar Park, we regularly see the same pattern: homes built during the 2005-2015 boom were insulated to minimum code with fiberglass batts that have settled, compressed, or pulled away from top plates, leaving thermal bypasses that drive summer electric bills past $400 on the west side of town. The Hill Country heat radiating off limestone outcroppings doesn’t help. Neither does the seasonal temperature swing, which can stress rigid foam boards until they crack. Spray foam solves both problems by expanding to fill irregular cavities and adhering to substrates without fasteners or gaps.
Our crews are background-checked, uniformed, and arrive with a written scope, written warranty, and documented photo record. Calls to (737) 245-6428 are answered by a live person, 24/7. No voicemail loops. No callback windows measured in business days.
What Our Spray Foam Insulation Service Includes
Open-Cell Spray Foam
Open-cell spray foam is a half-pound density foam that expands to roughly 100 times its liquid volume, creating a soft, flexible insulation matrix with an R-value of about R-3.6 per inch. In Cedar Park, we use it most often for attic floors and wall cavities where we need depth without the weight or cost of closed-cell, and where the assembly can dry to the interior. Because it’s vapor-permeable, open-cell works well in our climate zone when paired with proper air sealing of top plates and can lights. We specify Owens Corning Foamular or Johns Manville open-cell systems depending on the substrate condition and the blower-door starting number. Every open-cell job gets a before-and-after pressurization test so you can see the CFM50 reduction in writing.
Closed-Cell Spray Foam
Closed-cell spray foam is a two-pound density foam that cures rigid, delivering R-6.5 per inch and adding structural rigidity to the assembly. We use it in Cedar Park for rim joists, crawl space walls, and any application where we need a vapor barrier in a single pass. The 2009 and 2012 IRC code cycles adopted here in Williamson County make closed-cell the default choice for below-grade work and for roof decks where we’re converting an attic to conditioned space. Our crews are trained in the pressure and temperature settings for each manufacturer’s chemistry, and we never spray over a surface that hasn’t been moisture-checked and documented. The photo record shows substrate condition before foam touches it.
Rim Joist Spray Foam
The rim joist, or band joist, is the perimeter framing member where your floor system meets the foundation. It’s the leakiest square foot in most Cedar Park homes, especially the 1990s-2000s builds in Ranch at Brushy Creek and Buttercup Creek where fiberglass batts were stuffed loosely against the subfloor and left to sag. We remove the old material, air-seal the seam between sill plate and foundation with acoustic sealant, then spray two inches of closed-cell foam to create a continuous air and thermal barrier. The blower-door number almost always drops measurably from this detail alone. We’ve documented 400-800 CFM50 reductions from rim joist work in homes that looked otherwise well-sealed.
Garage Ceiling Spray Foam
Garage ceiling spray foam addresses the thermal bridge created when a conditioned room sits above an unconditioned garage. In Cedar Park’s newer subdivisions like Twin Creeks and Shenandoah, this detail was often missed or handled with a thin fiberglass batt that compressed under its own weight, though we also handle our Spray Foam Insulation in Round Rock. We spray open-cell foam to full depth between the garage ceiling joists, extending to the wall top plates to eliminate end-dam convection loops. The result is a floor assembly that doesn’t read cold on infrared in January and doesn’t send air conditioning dollars into a 120-degree garage in August. We include garage ceiling work in our written scope with line-item pricing so you can phase it if needed.
Spray Foam Roof Deck
Spray foam applied directly to the underside of the roof deck converts a vented attic into a conditioned attic, moving the thermal boundary from the floor to the roofline. This is the right approach for Cedar Park homes with HVAC equipment or ductwork in the attic, which describes most single-story builds from 1985 forward. We spray open-cell foam to R-38 depth across the full roof deck, including the gable ends, and we seal all penetrations before the rig arrives. The blower-door test is performed after air sealing but before foam, then again after, so you can isolate the foam’s contribution from the sealing work. We’ve seen attic temperatures drop from 140°F to 85°F in July with this assembly.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for Spray Foam Insulation
We source spray foam materials from Owens Corning, Johns Manville, Knauf, and other manufacturers with established supply chains in Central Texas. Our crews have sprayed thousands of sets of Owens Corning FOAMULAR and Johns Manville AP Foil-faced systems, and we maintain current manufacturer certifications for application technique, substrate preparation, and thickness verification. We don’t lock you into a proprietary product. If your architect or energy consultant specifies a particular brand or density, we price it transparently and source it through our normal channels.
Whether your project calls for Owens Corning, Johns Manville, Knauf, or another make, we can help. We bring the same documentation standards to every job: written price, written scope, written warranty, and a photo record with thickness readings.
Signs You Need Spray Foam Insulation Right Now
- Your summer electric bill exceeds $300 and climbs year over year. In Cedar Park, a well-sealed and insulated home under 2,500 square feet should run its air conditioner efficiently enough to keep July bills under $250 at current Austin Energy and PEC rates. If you’re consistently higher, the building envelope is leaking conditioned air faster than the HVAC can replace it. Spray foam, properly specified after a blower-door test, addresses the source rather than the symptom.
- Your attic floor insulation looks uneven or has visible gaps. Fiberglass batts settle, shift, and pull away from framing members over time. In the clay soils of northwest Austin, foundation movement can crack ceiling drywall and dislodge insulation without obvious interior signs. We document this with attic photos during our assessment and show you exactly what we’re seeing before we quote.
- Rooms on the west side of your home are consistently 5-10 degrees warmer. This is often a combination of inadequate insulation depth and thermal bypass at the top plate, where the wall cavity meets the attic. Spray foam seals and insulates in one operation, eliminating the convection loop that carries attic heat down into living space. We’ve solved this exact complaint in dozens of homes off Cypress Creek Road and RM 1431.
- Your HVAC runs continuously on hot afternoons without reaching setpoint. When the building envelope leaks at 4,000+ CFM50, the air conditioner is fighting a battle it can’t win. The equipment ages faster, the compressor cycles more frequently, and the humidity control suffers. Spray foam reduces the load so the system can cycle normally and dehumidify effectively.
- You’re finishing an attic or converting a garage to living space. Code requires new conditioned space to meet current insulation standards, and retrofitting with batts in irregular cavities is nearly impossible to do well. Spray foam conforms to any geometry and delivers the R-value you need without compressing or leaving voids. We specify the assembly to meet or exceed Williamson County code and provide the documentation for your permit closeout.
Our Spray Foam Insulation Process - Step by Step
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Schedule your free assessment. Call (737) 245-6428 and a live person will find a window that works. We serve Cedar Park and surrounding areas with typical response times of 24-48 hours. You’ll receive a confirmation text with your technician’s name and a notification when they’re en route.
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Blower-door test and attic inspection. We pressurize your home to 50 Pascals - a standard pressure differential - and measure the air leakage in CFM50, cubic feet per minute at that pressure. This single number tells us how much conditioned air is escaping. We also photograph insulation condition, moisture staining, and penetrations. You get copies of everything.
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Written scope and written price. Under Haven Standard Clause 1, no work starts without a flat price in writing. Your scope specifies foam type, target thickness, square footage, and any preparatory work like old insulation removal or air sealing. The warranty is attached. You can take this document to another contractor for our Free Second Opinion service if you want.
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Prep, air seal, then insulate - in that order. We never spray foam over an unsealed attic floor. Top plates, can lights, plumbing and electrical penetrations, and chimney chases are sealed with appropriate materials first. The blower-door test is repeated to quantify the sealing improvement. Only then does the spray foam rig arrive.
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Final test, documentation, and walkthrough. After foam cure, we perform a final blower-door test and compare to the baseline. You receive the photo record, thickness verification readings, the final pressurization numbers, and your warranty documentation. The 365-Day Done Right Promise applies from this date. If anything isn’t right, we make it right.
How Much Does Spray Foam Insulation Cost in Cedar Park?
A typical open-cell attic floor job in a 2,000-square-foot Cedar Park home runs $3,200-$5,400 for R-38 depth, depending on access difficulty and the amount of preparatory air sealing required. Closed-cell rim joist work in the same footprint typically runs $1,800-$3,200. Full roof deck spray foam, converting a vented attic to conditioned space, generally falls between $5,500 and $9,800 for the same size range.
Several factors move these numbers. Substrate condition matters: if we need to remove degraded fiberglass, remediate rodent activity, or repair moisture-damaged decking before foam can be applied, that’s additional labor and disposal. Access restrictions - tight crawl spaces, steep roof pitches, or limited rig parking in older neighborhoods like Buttercup Creek - add time. Foam thickness and density are direct material multipliers. And the starting air leakage number affects how much pre-foam sealing we specify.
To avoid overpaying, get a written scope that specifies brand, density, thickness, and square footage. Vague quotes like “$4,000 for the attic” leave room for substitution of cheaper material or insufficient depth. Our written prices include all of these details, and our Free Second Opinion service lets you compare our scope against any competing quote line by line.
Every estimate is free, includes the blower-door test, and comes with no obligation. Call (737) 245-6428 to schedule.
Spray Foam Insulation Near Cedar Park - Our Service Area
We work throughout the Cedar Park-Leander corridor and surrounding communities including Spray Foam Insulation in Leander, Spray Foam Insulation in Brushy Creek, Jollyville, Round Rock, Wells Branch, Lago Vista, Georgetown, Pflugerville, Lakeway, Austin, and Lost Creek. Most Cedar Park addresses see us within 24 hours of scheduling. Leander and Brushy Creek are typically same-day or next-day. Georgetown and Lago Vista may require 48-hour lead time depending on rig routing.
We also provide home energy audits, attic insulation, blown-in insulation, radiant barrier installation, and crawl space encapsulation throughout this service area. If you’re unsure whether spray foam is the right solution for your specific assembly, we can evaluate the whole envelope and recommend the most cost-effective sequence.
Serving Cedar Park, TX - Our Local Coverage Area
We’re based in the Cedar Park area and know this community well, and we also provide Spray Foam Insulation in Leander. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Spray Foam Insulation in Cedar Park
Spray foam insulation is a two-component chemical system that expands on contact to fill cavities, gaps, and irregular surfaces with a continuous layer of insulation and air barrier. It comes in two densities: open-cell, which is soft and vapor-permeable, and closed-cell, which is rigid and vapor-impermeable. We specify the type based on your assembly, your moisture management strategy, and the blower-door starting number from our assessment.
Most residential spray foam jobs in Cedar Park are completed in a single day, though large or complex projects may require two. The foam itself cures within minutes and is fully set within 24 hours. We schedule the blower-door test, any preparatory air sealing, and the foam application in sequence so you’re not waiting between trades. Call (737) 245-6428 for availability - estimates are free.
Open-cell attic spray foam typically runs $3,200-$5,400 for a 2,000-square-foot home at R-38 depth. Closed-cell rim joist work runs $1,800-$3,200. Full roof deck conversion ranges $5,500-$9,800. The final price depends on foam type, thickness, substrate condition, and access difficulty. We provide a written price before any work starts, and our Free Second Opinion service lets you verify our quote against any competitor’s. Call (737) 245-6428 for your specific numbers.
Yes. We source materials from Owens Corning, Johns Manville, Knauf, and other established manufacturers, and our crews are trained in the application requirements for each. We don’t claim exclusive or preferred status with any brand, and we don’t lock you into a proprietary product. If your project specifies a particular manufacturer, we price it transparently and source it through our normal supply chain.
We answer calls 24/7 and can typically respond to Cedar Park addresses within 24 hours. True emergencies in insulation are rare - most issues develop gradually - but we prioritize situations where failed insulation has created immediate comfort or safety concerns, such as exposed roof decks after storm damage or failed crawl space encapsulation with active moisture intrusion. Call (737) 245-6428 and we’ll assess urgency honestly.
All completed work is backed by our 365-Day Done Right Promise: if it’s not done right, we make it right. You also receive a written warranty specific to the foam manufacturer’s product, typically covering degradation or failure of the material itself. Both documents are delivered before work starts under Haven Standard Clause 1. The photo record and blower-door readings provide the baseline documentation for any future warranty claim.
Clear attic access paths and remove stored items from the work area. We’ll cover or protect anything that remains. For occupied homes, we recommend planning to be out of the house for 24 hours after foam application while off-gassing completes and ventilation clears the air. We communicate the re-entry timing clearly before we start, and we verify air quality with our own instruments before inviting you back. If you have specific sensitivities, tell us during the estimate and we’ll adjust the ventilation plan.
Schedule Your Spray Foam Insulation Service in Cedar Park Today
Call (737) 245-6428 to speak with a live person, 24/7. We’ll schedule your free assessment, perform the blower-door test, and deliver a written price before any work starts. Every job includes a documented photo record, and applicable work comes with before-and-after pressurization numbers you can verify yourself. The 365-Day Done Right Promise applies to everything we do. No obligation, no pressure, no voicemail loops.
Written by Wes Okafor, Owner at Topside Attic Insulation Cedar Park, serving Cedar Park since 2016.