Fast, Reliable Spray Foam Insulation Across Selma
Spray foam insulation in Selma typically runs $1,800-$4,500 for attic retrofits, with most jobs completed in a single day. We’re Envelope Insulation Co., and our crews work Selma’s 1997-2010 tract neighborhoods weekly - from Olympia Parkway subdivisions to the Forum corridor - correcting the same builder-grade batt failures we see house after house. Dispatch runs through our San Antonio office, but the truck that shows up knows Selma’s housing stock cold. Call (737) 227-6219 and a live person answers, 24/7.
Why Envelope Insulation Co. Is Selma’s Preferred Spray Foam Insulation Company
We’ve sealed and insulated over 9,000 homes since 2016, and a concentrated pocket of them sit right here in Selma. The pattern is unmistakable: walk into any subdivision off Loop 1604, pop the attic hatch, and you’re looking at compressed Johns Manville or Owens Corning fiberglass batts, paper facing down, that have been cooking at 150°F for twenty years.
Our Selma customers come back because we publish before-and-after blower-door numbers - a pressurization reading that shows, in one figure, how much conditioned air their home was losing before and after the work. No feelings. No “significantly improved.” Just the CFM50 reading, documented.
Under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way. Written price before any work starts. Documented Photo Record when the crew leaves. The 365-Day Done Right Promise applies to every job.
Calls are answered by a live person, not a voicemail loop. Most Selma appointments are scheduled within 48 hours.
Our Spray Foam Insulation Services in Selma
Open-Cell Spray Foam
Open-cell foam is our primary recommendation for Selma attic ceiling decks. It’s vapor-permeable, which matters enormously in this hot-humid climate - it lets moisture dry to the interior instead of trapping it against drywall. In Selma’s 1997-2010 slab-on-grade homes, we spray open-cell directly to the underside of the roof deck after removing those paper-faced-down batts, creating a conditioned attic that drops the temperature from 155°F to roughly 85°F. Most Selma attic jobs with open-cell run $2,400-$3,800 for 1,200-2,000 square feet.
Closed-Cell Spray Foam
Closed-cell foam, denser and vapor-impermeable, gets reserved for specific Selma applications: rim joists above garages, crawl space walls (where they exist), and occasional exterior wall injections in homes where gut renovation isn’t practical. At roughly R-6.5 per inch, it’s the right tool when you need maximum R-value in minimum depth. A typical Selma garage rim-joist treatment with closed-cell runs $800-$1,400.
Rim Joist Spray Foam
Selma’s slab-on-grade construction means the rim joist - the board connecting your exterior walls to the foundation - is often completely unsealed. We see daylight through rim joists in maybe sixty percent of Selma homes from the 2003-2007 build wave. Closed-cell foam here stops the stack effect that pulls garage fumes, pollen, and attic heat into your living space. It’s a small area with outsized impact. Most Selma rim-joist jobs finish in under four hours.
Garage Ceiling Spray Foam
Garage ceilings in Selma are a thermal disaster. The builder ran fiberglass batts across the ceiling plane with no air sealing, then the homeowner stored holiday decorations on them for fifteen years. We remove the compressed batts, seal all top-plate penetrations, and spray open-cell foam to create a proper buffer between your conditioned bedrooms and the 120°F garage below. This is where our Spray Foam Insulation team spends a lot of time in Selma’s Evans Ranch, Retama Springs, and Woodbridge subdivisions.
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.
Before
AfterTrusted Brands We Install in Selma
We source materials from Owens Corning, Johns Manville, Knauf, and Icynene - no proprietary lock-in, no house-brand foam that disappears next year. For Selma’s climate, we typically specify Icynene open-cell formulations with proven track records in Zone 2 hot-humid conditions. Our trucks carry stock for common Selma attic dimensions, so we’re not waiting on a Dallas warehouse to ship batts that don’t fit your joist spacing anyway.
Common Spray Foam Insulation Problems We See in Selma Homes
- Paper-facing-down fiberglass batts trapping moisture. In Selma’s hot-humid Zone 2 climate, the vapor retarder belongs on the warm-in-winter side - which, in Texas, means the exterior, not the interior ceiling. Builders in the 2003 boom installed it paper-down against drywall. Two decades of Gulf humidity have slowly wet the batt cores and stained ceiling planes across the city.
- Compressed, gapped batts at R-19 to R-30. Selma was built before Texas adopted the 2011 IECC requiring R-38+ in attics. The original batts have settled below their labeled R-value, and the gaps where they were cut around ducts and wiring are now superhighways for 160°F attic air.
- No air sealing at top plates, can lights, or duct chases. Volume builders in the Forum/Olympia Parkway corridor skipped this step entirely. We routinely measure 4,000+ CFM50 on pre-work blower-door tests in Selma homes - double what a properly sealed envelope should read.
- Exterior wall pipes freezing during cold snaps. Winter Storm Uri exposed how thin Selma’s original insulation envelope was. Slab-on-grade homes with unsealed rim joists and R-19 batts lost heat through walls fast enough to freeze pipes that never should have been at risk.
Pricing for Spray Foam Insulation in Selma, TX
| Service | Typical Range in Selma | What Drives Cost |
|---|---|---|
| Open-cell attic spray foam (1,200-2,000 sq ft) | $2,400-$3,800 | Removal of old batts, accessibility, decking repairs needed |
| Closed-cell rim joist (typical 2-car garage) | $800-$1,400 | Linear footage, existing obstruction density |
| Garage ceiling spray foam | $1,200-$2,200 | Square footage, whether old batts are removal-only or contaminated |
| Full attic retrofit: removal, air sealing, open-cell foam | $3,200-$4,500 | Attic square footage, ductwork in attic, number of can lights to seal |
| Closed-cell exterior wall injection (selective) | $1,800-$3,000 | Wall area, cavity condition, number of stories |
These are the ranges we see on actual Selma quotes written under Haven Standard Clause 1 - flat price, written scope, written warranty before anyone lifts a tool. Your specific number depends on what we find when we open the attic. Bring us any competing written estimate; we offer a Free Second Opinion and will read it with you line by line. Estimates are free. Call (737) 227-6219.
The Selma Condition: Why This City’s Housing Stock Needs Spray Foam Now
Here’s what makes Selma different from Schertz, Cibolo, or even neighboring Universal City. Selma is almost entirely a product of the late-1990s through mid-2000s Loop 1604 / I-35 development boom, meaning the bulk of its residential stock was built quickly with minimum-code fiberglass batts - typically R-19 to R-30 attics - installed before Texas adopted stricter 2011 IECC energy codes requiring R-38+. Those 20-to-25-year-old batts have now compressed and settled in attics that routinely exceed 150°F in summer, making Selma a concentrated pocket of underperforming original insulation ripe for retrofits.
But the R-value shortfall is only half the problem. Many Selma subdivisions were built by volume builders who used faced fiberglass batts installed paper-side down in the attic floor - a common shortcut of the era - meaning the vapor retarder is on the wrong side for this hot-humid climate and the batts have been slowly trapping moisture and losing loft for two decades. Our crews don’t just add insulation in Selma. We correct a systemic installation error that was repeated across hundreds of homes.
On a slab-on-grade home off Olympia Parkway, our crew pulled compressed R-19 Johns Manville batts out of a 155°F attic and found the paper facing turned down against the drywall, trapping Gulf humidity and staining the ceiling plane. We air-sealed the attic floor, then sprayed open-cell foam across the flat ceiling deck and closed-cell at the rim joist above the garage to seal the top plate. The homeowner’s upstairs bedroom finally held temperature on an August afternoon and the musty smell stopped coming through the return.
Sitting in IECC Climate Zone 2 on the northeast fringe of San Antonio, Selma endures extreme radiant heat loads - attic temperatures pushing 150-160°F on summer afternoons - combined with Gulf humidity spikes that can drive moisture into poorly air-sealed attic planes. The February 2021 Winter Storm Uri freeze event also exposed how thin the original insulation envelope was in many of these homes when pipes froze inside exterior walls. Spray foam, properly installed after air sealing, addresses both failure modes: it stops the summer heat drive and it creates a continuous thermal boundary that protects plumbing in winter.
We Also Serve Cities Near Selma
Our crews run weekly routes through Selma and surrounding communities: Canyon Lake to the north, Bulverde and Timberwood Park along Highway 281, and New Braunfels to the southeast. Same written-price standard, same blower-door documentation, same Haven Standard applies.
Serving Selma, TX - Our Local Coverage Area
We’re based in the Selma 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 Selma
Yes. A 2003 Selma home almost certainly has R-19 to R-30 fiberglass batts, paper-facing-down, that have compressed to roughly half their original thickness. We typically see pre-work blower-door readings of 3,500-4,500 CFM50 in these homes, and post-spray-foam readings of 1,800-2,400 CFM50 - a 40-50% reduction in conditioned air loss. The difference shows up in August electric bills and in rooms that finally hold temperature. Call (737) 227-6219 for an exact quote - estimates are free.
Selma’s climate is hot-humid, which means the vapor drive is predominantly inward - from the hot, moist exterior toward the cooler interior. In this climate, the vapor retarder should face the exterior (the warm side in summer). Builders in Selma’s 2003 boom installed it facing down against the drywall instead. The paper traps humidity inside the batt, the batt loses loft, and the ceiling plane slowly stains. It’s a climate-specific installation error repeated across hundreds of Selma homes. We correct it by removing the batts entirely and installing vapor-permeable open-cell foam that lets the assembly dry properly.
For Selma’s vented attics converted to conditioned space, we recommend open-cell foam sprayed to the roof deck. It’s vapor-permeable, cost-effective at R-3.6 per inch, and allows the roof sheathing to dry inward - critical in a climate where afternoon thunderstorms can wet the exterior. Closed-cell is reserved for rim joists, garage ceilings, and specific moisture-barrier applications. Most Selma attic jobs we quote use open-cell. Call (737) 227-6219 and we’ll walk through your specific roof configuration.
We remove them. The old batts in Selma homes are typically compressed, possibly moisture-damaged, and always in the wrong orientation. Blowing foam over them traps the existing problems and prevents proper adhesion to the substrate. Our crews remove, bag, and dispose of the old insulation, then air-seal all penetrations before spraying. The removal and disposal is line-itemed in your written price - no surprise add-on.
Uri exposed that Selma’s original batt envelopes were never air-sealed, so cold air could bypass the insulation through gaps at top plates, electrical boxes, and rim joists. Spray foam, properly installed after air sealing, creates a continuous thermal and air barrier. In Selma’s slab-on-grade homes, we particularly target the rim joist above the garage and the top plates of exterior walls - the paths cold air took in February 2021. The foam itself provides R-value; the air sealing stops the wind-washing that bypasses it. Call (737) 227-6219 - we’ll show you exactly where your home is vulnerable.
Get Your Written Price Before Any Work Starts
Every Selma job begins with a written price, a written scope, and a written warranty - Haven Standard Clause 1, no exceptions. You’ll receive a Documented Photo Record when the crew leaves, and on applicable jobs, before-and-after blower-door readings so you can verify the air-sealing result in a single number. The 365-Day Done Right Promise covers all completed work. Call (737) 227-6219; a live person answers 24/7.
Written by Wes Okafor, Owner at Envelope Insulation Co., serving Selma and the greater San Antonio metro since 2016.