Fast, Reliable Spray Foam Insulation Across Cibolo
Spray foam insulation in Cibolo typically runs $1.80-$3.20 per board foot for open-cell and $3.50-$5.50 for closed-cell, with most whole-attic jobs landing between $2,800 and $6,500 depending on whether we’re foaming the roof deck, garage ceiling, or both. We’re Envelope Insulation Co., independently owned and operated under The Haven Standard since 2016, and our crews serve Cibolo from our San Antonio dispatch office. Calls are answered by a live person 24/7 at (737) 227-6219. Most Cibolo homeowners who call us are dealing with the same thing: a two-story tract home built between 2000 and 2024 where the upstairs won’t cool below 78°F in July, even with the AC running flat out.
Why Envelope Insulation Co. Is Cibolo’s Preferred Spray Foam Insulation Contractor
We’ve sealed and insulated more than 9,000 homes since 2016, and a disproportionate share of our spray foam work has been in Cibolo’s master-planned subdivisions like Steele Creek and Cibolo Valley. These aren’t aging houses with settled cellulose from 1975. They’re 8-15 year-old builds where the production builder met minimum IECC compliance at permit, and that minimum left you with about R-30 of blown fiberglass that’s now dust-loaded and compressed to maybe 6 inches in the attic.
Our Cibolo customers find us the way most people find contractors now: they read the three-star reviews as carefully as the five-star ones, and they want to see documentation before they commit. We deliver that. Every job starts with a written price - flat, itemized, no work starts without it - and ends with a Documented Photo Record plus before-and-after blower-door numbers on air-sealing jobs. The blower-door test is a pressurization reading that shows, in one number, how much conditioned air your building envelope is losing. Most Cibolo tract homes we test before work read 3,500-5,000 CFM50. After we seal and foam, they’re typically under 2,500.
Under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way. Our 365-Day Done Right Promise applies to all completed work. If it’s not done right, we make it right.
Our Spray Foam Insulation Services in Cibolo
Open-Cell Spray Foam
Open-cell is our most common recommendation for Cibolo roof decks and attic conversions. It’s vapor-permeable, expands to fill irregular framing cavities in production-built trusses, and costs less per R-value than closed-cell. In Cibolo’s two-story homes along FM 1103 and Green Valley Road, we use open-cell on roof decks to bring the attic into the conditioned envelope, which is usually the only way to fix that 8-12°F upstairs-downstairs split. We air-seal first - top plates, soffit gaps, can light penetrations - then foam. Never the reverse. A typical open-cell roof deck job in Cibolo runs $2,800-$4,500 for a 2,400 square foot home.
Closed-Cell Spray Foam
Closed-cell is denser, higher-R per inch, and acts as its own vapor barrier. We use it sparingly in Cibolo - mainly for rim joist work in the few homes with elevated floors, or where local code amendments require ignition barriers that closed-cell’s harder surface can satisfy. It’s $3.50-$5.50 per board foot installed. For most Cibolo slab-on-grade tract homes, closed-cell on the roof deck is overkill and overbudget; open-cell with proper air sealing gets you the same performance outcome for less.
Rim Joist Spray Foam
Cibolo is almost entirely slab-on-grade, so rim joist work is limited. But in the pockets of Cibolo near Schertz where some elevated or walkout designs were built, or where homeowners have added conditioned space over garage, the rim joist is the thermal bridge that undoes everything else. We spray closed-cell here - 2-3 inches minimum - to seal the joint between sill plate and foundation. Rim joist jobs in Cibolo are typically $800-$1,800 depending on linear footage.
Garage Ceiling Spray Foam
This is where Cibolo’s 2021 Winter Storm Uri experience changed how we talk to homeowners. In a standard Cibolo two-story, the upstairs HVAC chase, water heater, and sometimes plumbing manifolds run through the unconditioned garage. During Uri, pipes in these chases froze in home after home because the garage ceiling had nothing but a layer of drywall and R-13 kraft-faced batts. We spray open-cell foam on garage ceilings to bring that chase into conditioned space, or at minimum to protect the mechanicals. It’s $1,200-$2,400 for a typical two-car garage in Steele Creek or Cibolo Valley. We see this as protective, not optional, in homes with upstairs mechanicals.
Spray Foam Roof Deck
The roof deck is where spray foam pays off most clearly in Cibolo. We remove the existing blown fiberglass (never foam over it), air-seal all penetrations and top plates, then spray open-cell directly to the underside of the roof decking. This converts your vented attic to an unvented, conditioned space. The HVAC ducts that were roasting in 150°F attic air now sit in 80°F air. Typical cost: $3,200-$5,800 for Cibolo’s standard 2,000-2,800 square foot two-story homes.
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.
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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.
Before
AfterTrusted Brands We Install in Cibolo
We source spray foam from Johns Manville, Knauf, and CertainTeed - no proprietary product lock-in, so we match the chemistry to the application rather than forcing a one-product solution. For Cibolo’s climate zone (IECC Zone 2), we specify 0.5 lb/ft³ open-cell density for roof decks and 2.0 lb/ft³ closed-cell for rim joists and garage band boards. We stock common set sizes locally, so most Cibolo jobs don’t wait on material delivery. Every batch is documented with manufacturer lot numbers in your job record.
Common Spray Foam Insulation Problems We See in Cibolo Homes
- Open-cell sprayed over settled fiberglass without air sealing first. We see this in Cibolo tract homes where a previous contractor foamed the roof deck but skipped the top plates and soffit gaps. The attic air is still connected to the wall cavities, so the upstairs stays hot and the homeowner paid for foam that didn’t solve the problem. We remove the failed foam, seal properly, and reapply.
- Garage ceiling skipped in two-story slab homes. The builder ran the upstairs duct chase through the garage, insulated it with R-13 batts, and called it done. In Cibolo’s 110°F July afternoons, that chase is a radiant oven. During Uri, it was a freeze risk. We foam the garage ceiling to protect the chase and the pipes inside it.
- Closed-cell applied too thick without thermal barrier. The IRC requires an ignition barrier or thermal barrier on foamed surfaces in living spaces. Some Cibolo contractors spray 4+ inches of closed-cell in a conditioned attic and leave it exposed. That’s a code violation and a fire risk. We install proper barriers per IBC Section 2603.
- Builder-grade kraft-faced batts left in place under new foam. The kraft paper traps moisture and the compressed batt negates the foam’s R-value. We remove all existing insulation before we seal or foam - every time, no exceptions.
Pricing for Spray Foam Insulation in Cibolo, TX
| Service | Typical Range in Cibolo |
|---|---|
| Open-cell roof deck (per board foot) | $1.80 - $2.40 |
| Closed-cell (per board foot) | $3.50 - $5.50 |
| Whole-attic open-cell, 2,400 sq ft home | $2,800 - $4,500 |
| Roof deck + garage ceiling combo | $4,200 - $6,500 |
| Rim joist (closed-cell, linear ft) | $800 - $1,800 |
| Garage ceiling only | $1,200 - $2,400 |
What moves you within these ranges: roof pitch (steeper = more surface area), existing insulation removal, accessibility of the garage ceiling chase, and whether we need to install ignition barriers. We don’t do “it depends” without numbers. Every Cibolo homeowner gets a written price before any work starts - flat, itemized, no hourly mystery. Bring us a competing quote; we’ll read it with you. Free Second Opinion on any written estimate. Call (737) 227-6219 to schedule.
We Also Serve Cities Near Cibolo
Our crews work daily in Schertz, Universal City, Converse, and New Braunfels. If you’re in one of these areas and found this page, Spray Foam Insulation in Cibolo covers the same service line with local pricing. Dispatch is coordinated from our San Antonio office, so response times to Schertz and Converse are comparable to Cibolo proper.
Serving Cibolo, TX - Our Local Coverage Area
We’re based in the Cibolo 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 Cibolo
Because Cibolo is one of the fastest-growing cities in the U.S., nearly every home here is a 2000-2024 tract build insulated only to the energy code of its permit year, so a “new” 10-year-old Cibolo house can legally have less attic R-value than a 1980s home in an older Texas city. Your 2015 build probably has R-30 blown fiberglass that’s now settled and dust-loaded, and the upstairs-downstairs temperature split you’re noticing is the proof. Call (737) 227-6219 for a free estimate - we’ll show you the blower-door numbers.
Yes, if it’s done as a system: air sealing first, then open-cell foam on the roof deck and garage ceiling. In Cibolo’s two-story subdivisions, the upper floor consistently runs 8-12°F hotter than the lower floor in summer - a telltale sign of builder-minimum attic insulation combined with West and South roof exposures. We see this in Steele Creek, Cibolo Valley, and along Green Valley Road. The roof deck foam brings the attic into conditioned space; the garage ceiling foam protects the upstairs duct chase. Call (737) 227-6219 and we’ll test your home’s envelope leakage to confirm the diagnosis.
Yes, if your upstairs HVAC chase, water heater, or plumbing runs through the garage. In Cibolo’s slab-on-grade two-story tract homes, this is the standard builder configuration, and the garage ceiling is the only thermal boundary protecting those systems. During Winter Storm Uri, pipes in these chases froze because R-13 batts and drywall don’t stop conductive heat loss. Open-cell garage ceiling foam runs $1,200-$2,400 in Cibolo and protects against both summer heat gain and rare hard freezes. Call (737) 227-6219 to check your chase layout.
It helps significantly if the right surfaces are foamed. Uri exposed how builder-spec insulation levels left pipes and mechanical systems in Cibolo tract homes dangerously vulnerable. The critical surfaces are the garage ceiling (protecting upstairs chases) and any exterior wall penetrations. Spray foam alone won’t save you in a multi-day grid failure, but it extends the time your home stays above freezing and reduces the risk of pipe bursts in the 12-24 hour outages Cibolo saw. We document the before-and-after thermal performance so you know exactly what you paid for. Call (737) 227-6219 for specifics on your home.
Open-cell, almost always. Cibolo’s climate zone doesn’t require the vapor barrier properties of closed-cell, and open-cell’s lower cost per R-value means we can achieve the same thermal result for 30-40% less. Closed-cell is reserved for rim joists, garage band boards, or specific code requirements. The exception: if your roof deck has chronic moisture issues from a venting failure, we’ll diagnose that first rather than trap moisture with either product. Call (737) 227-6219 - estimates are free, and we publish the blower-door numbers so you can verify the result.
Ready to Fix Your Cibolo Home’s Upstairs Heat Problem?
We’re Envelope Insulation Co., and our Spray Foam Insulation team serves Cibolo from our San Antonio dispatch office. Every job begins with a written price and ends with a Documented Photo Record; on air-sealing jobs, you get before-and-after blower-door readings so you can see the performance change in a single figure. The 365-Day Done Right Promise applies to all work. Calls are answered by a live person 24/7. Call (737) 227-6219 for your free estimate.
Written by Wes Okafor, Owner at Envelope Insulation Co., independently owned and operated under The Haven Standard since 2016.
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