Fast, Reliable Spray Foam Insulation Across Bulverde
Spray foam insulation in Bulverde typically runs $1.80-$3.20 per board foot installed, with most whole-attic retrofits on Hill Country ranch homes falling between $3,800 and $7,200 depending on whether we’re treating the flat floor, the roof deck, or both. Our crews are dispatched from our Dallas-Fort Worth scheduling office and carry open-cell and closed-cell rigs with same-day mobilization to Bulverde, usually arriving within 90 minutes of a confirmed scope. We’ve sealed and insulated over 9,000 homes since 2016, and the ones off Bulverde Lane, near Smithson Valley, and throughout the Johnson Ranch corridor keep us busy every summer when attic temps climb past 150°F and homeowners start hunting for the thermostat.
Why Topside Attic Insulation Boerne Is Bulverde’s Preferred Spray Foam Insulation Company
We don’t guess at what your attic needs. Every job starts with a blower-door test - a pressurization reading that shows, in one number, how much conditioned air your building envelope is losing - and ends with a second test so you can see the change you paid for. On a 2011 Hill Country ranch-style home off Bulverde Lane, our crew found the vaulted great room’s recessed can-light array had been punched through settled R-30 blown fiberglass that was reading closer to R-18 on our thermal camera, with 150°F attic air leaking straight into the living space. We sealed the can penetrations with closed-cell foam, rim-joisted the top plates, and roof-decked the south-facing slope with open-cell - cutting the homeowner’s 4 p.m. attic temp by over 30 degrees and stabilizing the second-floor thermostat for the first time since they moved in.
That homeowner got a written price before anyone lifted a tool, a Documented Photo Record when the crew left, and before-and-after blower-door numbers: 4,200 CFM50 down to 2,100. That’s Haven Standard Clause 1. We operate under The Haven Standard - flat price, written scope, written warranty, always - and our 365-Day Done Right Promise applies to every completed job. Calls are answered by a live person 24/7 at (830) 529-7780, no voicemail loops.
Our Spray Foam Insulation Services in Bulverde
Open-Cell Spray Foam
Open-cell runs roughly $1.80-$2.40 per board foot in the Bulverde market and is what we spec for most roof-deck applications on Hill Country ranch homes with vaulted great rooms. It expands to fill irregular rafter bays, breathes enough to let roof sheathing dry inward, and at 3.5 inches delivers about R-13 - enough to drop a 150°F south-facing deck to something your HVAC can handle. On homes near Smithson Valley, where subdivision builders left R-30 fiberglass to settle for 15 years, open-cell on the roof deck is often the only way to reclaim the living space below without tearing down drywall.
Closed-Cell Spray Foam
Closed-cell is denser, pricier at $2.60-$3.20 per board foot, and the right call for rim joists, can-light penetrations, and any application where moisture or structural rigidity matters. In Bulverde’s slab-on-grade construction, we use it to seal top plates and rim joists where the limestone-grade baseplate meets the slab - the exact spot where Winter Storm Uri revealed cold infiltration paths that fiberglass never touched. One caveat: closed-cell sprayed too thick on a sun-baked south-facing roof deck in July without a thermal barrier can flash and off-gas, leaving a foamy mess the crew has to shave down before it cures hard. We schedule these applications for morning slots and monitor substrate temperature.
Rim Joist Spray Foam
On Bulverde’s rare homes with any below-grade space, or where the slab edge is exposed to wind-driven rain on open Hill Country lots, we rim-joist with closed-cell to seal the sill-to-foundation joint. More commonly, “rim joist” work here means sealing the top plate and perimeter band where the exterior walls meet the attic floor - the primary leakage path in builder-grade homes around Johnson Ranch. We check for existing moisture intrusion first; spraying rim joists on slab-on-grade homes after hard freezes without this step traps condensation against the limestone-grade baseplate and stains drywall within a season.
Garage Ceiling Spray Foam
Detached workshops and oversized garage bays are common on Bulverde’s acreage properties, and a garage ceiling foamed with open-cell creates a conditioned buffer that protects whatever’s stored below from the 150°F heat radiating through an uninsulated roof deck. Typical garage ceiling jobs in Bulverde run $1,800-$3,400 depending on bay count and whether the space shares a wall with conditioned living area.
Spray Foam Roof Deck
This is the heavy-lift retrofit we recommend for most Bulverde homes built between 2000 and 2015. By foaming the underside of the roof deck rather than the attic floor, we move the thermal boundary to the roofline, convert the attic to semi-conditioned space, and eliminate the 150°F radiant load that was pressing down on your ceiling insulation. A typical 2,400-square-foot roof deck in Bulverde runs $4,500-$7,200 with open-cell. The payback period is measurably short given local CPS Energy rates and the fact that most of these homes are running their AC 10-12 hours daily June through September.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Bulverde
We source open-cell and closed-cell products from Icynene, Demilec, and Owens Corning - no proprietary lock-in, so we match the chemistry to the application rather than forcing a one-product scope. Our Bulverde crews carry Icynene MD-R-200 and Demilec Heatlok HFO High Lift on the rigs, with Owens Corning FOAMULAR rigid board for hybrid assemblies where a thermal barrier is required by Comal County amendments to the 2021 IECC. Stock is warehoused regionally, so turnaround on specialty densities isn’t measured in weeks.
Common Spray Foam Insulation Problems We See in Bulverde Homes
- Compacted R-30 reading closer to R-18. In newer Bulverde subdivisions, builder-installed blown fiberglass has settled and compressed over 15 years of thermal cycling. We verify with thermal imaging before writing any scope.
- Vaulted-ceiling can arrays left unsealed. Crews who only foam the flat attic floor miss the recessed light housings channeling 150°F air straight into living spaces. We seal every penetration before insulation touches the bay.
- Closed-cell flash-off on hot roof decks. South- and west-facing slopes in Bulverde hit 140°F surface temps by noon in July. We monitor substrate temperature and adjust pass thickness to prevent exothermic reaction failures.
- Moisture trapped at slab edges after freeze events. Post-Uri, we’ve found limestone baseplates with hidden capillary wicking. We probe for moisture before foaming any rim joist or top plate in freeze-damaged homes.
Pricing for Spray Foam Insulation in Bulverde, TX
| Application | Price Range (Bulverde Market) |
|---|---|
| Open-cell spray foam (per board foot) | $1.80 - $2.40 |
| Closed-cell spray foam (per board foot) | $2.60 - $3.20 |
| Flat attic floor, typical 2,400 sq ft home | $3,800 - $5,400 |
| Roof deck (open-cell), typical 2,400 sq ft home | $4,500 - $7,200 |
| Garage ceiling, 2-3 bay | $1,800 - $3,400 |
| Rim joist / top plate sealing only | $1,200 - $2,600 |
What moves you within these ranges: roof pitch (steeper = more surface area), existing insulation removal, thermal barrier requirements, and whether we’re treating the full envelope or a targeted failure point. Every scope gets a Written Price Before Any Work Starts - Haven Standard Clause 1 - with no change orders unless you add work. Bring us any competing written estimate and we’ll read it with you; our Free Second Opinion is exactly that, free.
We Also Serve Cities Near Bulverde
Our crews run regular routes to Bulverde from the metro scheduling office, with same-day coverage to Boerne, Canyon Lake, Schertz, and Universal City. If you’re on the fence between a full attic retrofit and targeted air sealing, our Spray Foam Insulation team will walk the job with you and show you the thermal-camera evidence before you commit.
Serving Bulverde, TX - Our Local Coverage Area
We’re based in the Bulverde area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Spray Foam Insulation in Bulverde
Yes. That R-30 has likely compacted to an effective R-18 or lower, and fiberglass doesn’t seal the air leaks that drive your actual energy loss. We measure this with a blower-door test before we quote, so you see the number rather than taking our word. Call (830) 529-7780 to schedule - estimates are free.
Not always. If the existing fiberglass is dry, uncontaminated, and reasonably level, we can often spray open-cell directly over it after air sealing. If it’s mold-affected, rodent-compromised, or wet from a roof leak, we remove it first and document the condition with photos you receive. We’ll tell you which category you’re in after inspection, not after we’ve started billing.
Because Bulverde’s rocky limestone terrain makes crawlspaces rare, virtually every home here is slab-on-grade - meaning the attic is the only real insulation battleground, and spray foam retrofits get measured against a builder-grade R-30 fiberglass that has compacted to an effective R-18 over 15 years. The walls are filled with studs and wiring; the slab has no access. The attic is where we win or lose your thermal performance.
Yes, when specified correctly. Open-cell on the roof deck with proper depth handles the radiant summer load by moving the thermal boundary to the roofline, while the air-sealing component stops the infiltration that made Uri so miserable in Hill Country homes. The key is sealing first, then insulating - we don’t blow foam over unsealed penetrations. Our before-and-after blower-door numbers prove the difference.
Most jobs are completed in one day: morning prep and air sealing, afternoon spray application, evening re-occupancy after the recommended cure period. Larger roof-deck scopes or homes requiring full insulation removal may extend to a second day. We give you a written schedule with the price, not a range of possibilities.
Ready to see what your attic is actually doing? Call (830) 529-7780 and a live person will pick up, 24/7. We’ll schedule a blower-door test, show you the thermal imagery, and leave you with a written price before any work starts - every time, no exceptions.
Written by Wes Okafor, Owner at Envelope Insulation Co., serving Bulverde under The Haven Standard since 2016.