Trusted Spray Foam Insulation for New Braunfels Homeowners
Spray Foam Insulation in New Braunfels typically costs $1.80-$3.50 per board foot depending on open-cell or closed-cell choice, and most residential jobs are completed in one to two days. We’re Topside Attic Insulation New Braunfels, and we’ve been sealing and insulating homes across Comal and Guadalupe counties since 2016. Our crews start every spray foam job with air sealing - top plates, can lights, plumbing and electrical penetrations get sealed before foam ever touches the surface. Same-day estimates are available in New Braunfels, and a live person answers our phones at (830) 243-6352 around the clock.
The Hill Country climate here puts real stress on building envelopes. Summer attic temperatures in neighborhoods like Copper Ridge and River Chase regularly hit 140°F, and winter cold snaps can drop below freezing for consecutive nights. Homes built during the 2015-2022 construction boom in New Braunfels often have insulation that meets code minimum but performs poorly under actual conditions. We’ve completed over 9,000 sealing and insulation jobs since 2016, every one starting with a written price and ending with a Documented Photo Record. On applicable jobs, we publish before-and-after blower-door numbers so you can verify the air-sealing result in a single figure.
What Our Spray Foam Insulation Service Includes
Open-Cell Spray Foam
Open-cell spray foam is a lightweight, semi-rigid foam that expands to fill cavities and delivers an R-value of approximately R-3.6 per inch. In New Braunfels, we use it most often for above-grade wall cavities and attic floors where breathability matters and the assembly doesn’t face direct moisture pressure. Our crews apply it after sealing all top plates, electrical penetrations, and can light housings - we never blow foam over an unsealed surface. The material we source from Demilec expands to fill irregular stud bays common in the custom homes built along the Guadalupe River corridor, and we verify minimum thickness with depth gauges during application.
Closed-Cell Spray Foam
Closed-cell spray foam is a denser, rigid foam at R-6.5 per inch that also functions as a vapor barrier when applied at sufficient thickness. We specify it for New Braunfels homes in flood-prone areas near the Comal River, for exterior walls in conditioned crawl spaces, and for any application where structural rigidity adds value. Our crews have applied closed-cell foam from Johns Manville in hundreds of local homes, including the pier-and-beam structures common in older neighborhoods like Historic Downtown and Comal Town. Every closed-cell job gets a written thickness specification in the scope, and we spot-check with pin-type depth meters before the crew leaves.
Rim Joist Spray Foam
The rim joist - the perimeter band where your floor framing meets the foundation - is often the leakiest part of a home’s thermal envelope. In New Braunfels, we find unsealed rim joists in homes from every decade, and they’re responsible for cold floors, musty crawl space odors, and rodent entry. We spray closed-cell foam across the entire rim joist surface after removing any existing fiberglass that’s hiding air paths. The work typically takes four to six hours for a 2,000-square-foot home, and we include before-and-after blower-door readings when the rim joist is part of a larger envelope job.
Garage Ceiling Spray Foam
Garage ceilings with living space above them are thermal bridges in most New Braunfels homes - the temperature in an uninsulated garage ceiling assembly can swing 40°F from the room above. We spray open-cell foam against the garage ceiling drywall or roof deck after sealing all duct penetrations, wire holes, and the garage-to-house wall top plate. In neighborhoods like Vintage Oaks and Meyer Ranch, where bonus rooms over garages are common, this application often drops the temperature differential to under 5°F. We document the work with photos of the sealed top plate and the finished foam surface.
Spray Foam Roof Deck
Spray foam applied directly to the underside of the roof deck converts an attic from vented to conditioned space - a strategy that works well for New Braunfels homes with HVAC equipment or ductwork in the attic. We use open-cell foam for most roof deck applications, applied to a consistent depth that achieves the R-value specified in our written scope. The crew seals all penetrations first: chimney chases, vent stacks, electrical service masts, and any gaps in the top plates of interior walls. We’ve conditioned attics in homes throughout Solms Ranch, Oak Run, and the Hills of River Chase, and we provide the blower-door comparison showing the envelope improvement.
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’ve applied Demilec spray foam systems in hundreds of New Braunfels-area homes, particularly their heat-low-VOC formulations that perform well in the confined attic spaces common during summer installation windows. Our crews understand the specific expansion characteristics and temperature sensitivity of Demilec products, and we maintain the application equipment calibration that these formulations require. Owens Corning’s FOAMULAR and spray foam lines are another staple in our inventory - we’ve used their closed-cell products in crawl space encapsulations and exterior wall applications where compressive strength matters.
Johns Manville supplies both the spray foam we apply and the blown-in insulation we often pair with it in hybrid assemblies. Their open-cell products integrate cleanly with air-sealing protocols, and we’ve developed specific techniques for applying JM foam over their own mineral wool batts in sound-rated wall assemblies. GreenFiber’s cellulose-based blown-in products sometimes appear in our jobs as a cost-effective cap over spray foam in deep attic applications. Whether your project calls for Demilec, Owens Corning, Johns Manville, GreenFiber, or another manufacturer, we source materials based on performance specifications rather than proprietary lock-in.
Before
AfterSigns You Need Spray Foam Insulation Right Now
- Your upstairs rooms run 8-12°F warmer than downstairs in July. This temperature stratification signals that your attic is dumping heat into the conditioned space faster than your HVAC can remove it. In New Braunfels, where cooling dominates energy bills, spray foam on the roof deck or attic floor breaks that heat transfer path.
- You can see daylight around plumbing stacks or electrical boxes in your attic. Every pinhole of light is an air leak that carries conditioned air out and attic air in. We seal these penetrations as a prerequisite to any foam application, and the blower-door test quantifies the improvement.
- Your energy bills spike every June and stay elevated through October. The Hill Country’s extended cooling season exposes inadequate insulation quickly. Homes in New Braunfels with spray foam attic assemblies typically see 25-40% cooling load reduction compared to fiberglass-only attics.
- Your floors are cold above the crawl space or garage even when the heat runs. Rim joists and garage ceilings are often completely unsealed in homes built before 2020. Closed-cell spray foam at these boundaries stops the convective loop that pulls conditioned air down and replaces it with outside air.
- You’ve had condensation, mold, or musty odors in the attic or crawl space. These moisture problems start with air leakage carrying humidity into cavities where it condenses on cold surfaces. Spray foam, properly applied after air sealing, eliminates the condensation surface by keeping the cavity at or near indoor conditions.
Our Spray Foam Insulation Process - Step by Step
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Site evaluation and blower-door test. We arrive with a written appointment time and a named technician who texts when en route. The crew runs a blower-door test - a pressurization reading that shows, in one number, how much air your building envelope is losing. We photograph existing conditions, identify thermal bypasses, and measure cavity depths.
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Written scope and price. Under Haven Standard Clause 1, you receive a flat price, written scope, and written warranty before anyone lifts a tool. The scope specifies foam type, target R-value, minimum thickness, and air-sealing details. No work starts without your signature on that document.
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Air sealing before insulation. We seal top plates with acoustic sealant and rigid foam, box out can lights with fire-rated covers, and foam-seal all penetrations. This step is non-negotiable - we will not spray foam over an unsealed attic floor or wall cavity. The crew documents each sealed location with photos.
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Spray foam application and thickness verification. Our technicians apply foam to the specified depth, using pin-type meters and depth gauges to verify minimum thickness across the job. We monitor substrate temperature and ambient humidity - both affect expansion and adhesion - and adjust application parameters accordingly.
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Final inspection, documentation, and blower-door retest. The crew chief walks the job with you, reviews the photo record, and presents the after-application blower-door number. You leave with a written completion certificate, the photo documentation, and the 365-Day Done Right Promise in writing.
How Much Does Spray Foam Insulation Cost in New Braunfels?
A typical open-cell attic floor application in a 2,000-square-foot New Braunfels home runs $3,200-$5,800 depending on target R-value and accessibility - here’s how much Spray Foam Insulation costs for common applications. Closed-cell foam in a crawl space or rim joist application typically ranges $4,500-$8,200 for the same footprint, reflecting the higher material density and slower application rate. Roof deck conditioning with open-cell foam generally falls between $5,500 and $10,000, varying with roof pitch, complexity, and whether existing insulation must be removed first.
Several factors move these numbers. Cavity depth limits how much foam can be applied - shallow rafter bays may need furring strips or hybrid assemblies with rigid foam. Existing insulation removal adds $1.50-$3.00 per square foot. Homes in Canyon Lake or Bulverde with steep roof pitches or limited attic access require additional labor for safe material handling. We price every job individually after inspection, and our written scope breaks out each line item so you can see where the money goes.
To avoid overpaying, get competing quotes in writing and compare them line by line. Some contractors quote by the square foot of floor area rather than board feet of foam, which obscures whether you’re buying enough thickness. Others skip air sealing to hit a lower price, then blame the homeowner when performance disappoints. We offer a Free Second Opinion on any written estimate - bring us a competing quote and we’ll read it with you, identifying what’s included, what’s omitted, and where the numbers come from.
Our free estimate includes the blower-door test, the photo documentation of existing conditions, and the written scope with flat price. There is no obligation to proceed, and we do not charge for the diagnostic visit.
Spray Foam Insulation Near New Braunfels - Our Service Area
We run spray foam crews daily throughout the I-35 corridor and Hill Country periphery. Response time to Cibolo and Schertz is typically same-day or next-morning. Seguin, Selma, and Universal City fall within our standard two-day scheduling window. Canyon Lake, Bulverde, and Timberwood Park require slightly longer lead times due to travel, but we maintain regular routes to all three. We also serve Live Oak, Converse, Windcrest, and the growing subdivisions northeast of San Antonio. If you’re considering Spray Foam Insulation in Cibolo or Spray Foam Insulation in Seguin, the same crew, equipment, and Haven Standard protocols apply.
Serving New Braunfels, TX - Our Local Coverage Area
We’re based in the New Braunfels 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 - Spray Foam Insulation in New Braunfels
Spray foam insulation is a two-component chemical mixture that expands on contact to fill cavities and hardens into a rigid or semi-rigid thermal barrier. It simultaneously insulates and air-seals, addressing the two largest sources of energy loss in most homes. We apply it after manual air sealing of top plates and penetrations, then verify thickness and coverage before the crew leaves.
Most residential spray foam jobs in New Braunfels are completed in one to two days. A standard attic floor with open-cell foam takes six to eight hours of application time after prep and air sealing. Roof deck conditioning or crawl space work with closed-cell foam may extend to a second day for proper curing and inspection. We schedule a specific arrival window and text when the technician is en route.
Open-cell attic applications typically run $3,200-$5,800 for a 2,000-square-foot home; closed-cell crawl space or rim joist work ranges $4,500-$8,200; roof deck conditioning falls between $5,500 and $10,000. Final pricing depends on foam type, target R-value, cavity depth, and whether existing insulation removal is required. Call (830) 243-6352 for a free estimate with written price - estimates are free and carry no obligation.
Yes. We apply spray foam from Owens Corning, Johns Manville, and Demilec regularly, and we do not maintain exclusive relationships with any manufacturer. Our specification is based on your home’s needs - vapor drive, cavity depth, fire rating - not on product availability or rebate programs. We can also work with other brands if your project has specific requirements.
We answer calls live 24/7, and we can dispatch for urgent situations like post-storm envelope damage or failed insulation exposing conditioned space. True spray foam emergencies are rare - the material doesn’t fail catastrophically - but we treat water intrusion, pest damage, or construction defects that compromise the thermal barrier with priority scheduling. Call (830) 243-6352 any time; a live person will answer and determine the appropriate response.
Every spray foam job carries our 365-Day Done Right Promise - if it’s not done right, we make it right. The specific warranty terms are written into your scope document before work begins, covering material adhesion, thickness, and the air-sealing result documented by blower-door test. We do not ask you to trust a verbal promise; the warranty is in writing, signed by both parties.
Clear attic access paths and remove stored items from the work area. We need three feet of clearance around the attic hatch and safe walking paths to all corners. For crawl space work, ensure the access door is unobstructed and pets are secured. We handle all protective covering of finished surfaces, and we use containment to protect your home from overspray. The crew chief reviews the preparation checklist with you during the estimate walkthrough.
Schedule Your Spray Foam Insulation Service in New Braunfels Today
Call (830) 243-6352 to speak with a live person and schedule your free estimate. We’ll run the blower-door test, photograph existing conditions, and deliver a written price with flat scope and warranty before any work starts. Same-day and next-day appointments are available throughout New Braunfels, Cibolo, Seguin, and surrounding areas. Under Haven Standard, you get a named technician, a text when they’re en route, and a Documented Photo Record when the job is done.
Written by Wes Okafor, Owner at Topside Attic Insulation New Braunfels, serving New Braunfels since 2016.