Insulation in Selma, TX
Crawl space encapsulation and vapor barrier installation in Selma typically runs $3,200-$6,800 for a full encapsulation, with most jobs completed in one to two days. Because Selma’s housing stock is almost entirely 5-25 year old builder-grade tract homes with minimal attention to the building envelope, we’re regularly called to fix moisture problems that started when the home was built. Call (830) 243-6352 for a written price before any work starts.
Envelope Insulation Co. operates under The Haven Standard: every job begins with a written scope and flat price, and ends 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.
Why Selma Homes Are Different
Selma exploded from a small crossroads into a suburb of roughly 10,000 people almost entirely during the 2000s-2020s construction boom. That means the housing stock is nearly 100% builder-grade tract homes aged 5-25 years - code-minimum R-13 walls and R-30 attics installed fast and cheap, now settling and degrading in a climate where attic cavities routinely hit 140°F+ each summer.
Unlike older San Antonio neighborhoods where insulation was simply never installed, or like-new construction where it’s still fresh, Selma sits in a precise sweet spot. Original builder insulation is just old enough to have compacted and failed, making attic top-offs and air-sealing retrofits the dominant call type across virtually every subdivision in the city. The 2021 Winter Storm Uri exposed how poorly air-sealed these homes are, with burst pipes running through poorly insulated exterior walls and garages throughout newer subdivisions.
Installers working Selma subdivisions off Olympia Parkway consistently find that blown-in fiberglass added over batt insulation during the mid-2000s building frenzy has settled to an effective R-15 or less in attics nominally rated R-30 at install. Nearly every home in these neighborhoods is a legitimate upgrade candidate even though the insulation feels “relatively new” to the homeowner.
Our Main Selma Services
These are the three services Selma homeowners call about most often; each has its own dedicated page with deeper pricing and project examples.
Attic Insulation in Selma
Attic insulation is the dominant call in Selma because builder-grade R-30 fiberglass has compacted to R-15 or less across most Olympia Parkway-area subdivisions. We always air-seal top plates, can lights, and penetrations before adding insulation - never over an unsealed attic floor. Attic Insulation in Selma covers our full process, blower-door verification, and typical price ranges for homes in your square footage.
Spray Foam Insulation in Selma
Spray foam makes sense in Selma for open floor plans with large vaulted attic spaces that are difficult to treat with batts or blown-in. We source materials from Owens Corning, Johns Manville, and other manufacturers - no proprietary lock-in. Spray Foam Insulation in Selma explains open-cell versus closed-cell applications and when each is appropriate for local building stock.
Blown-In Insulation in Selma
Blown-in fiberglass or cellulose is the most common retrofit for Selma’s 1,500-2,800 sq ft slab homes, especially when topping off existing builder insulation that has settled below code. We use GreenFiber cellulose and Owens Corning fiberglass, selected per job. Blown-In Insulation in Selma details density requirements and how we verify coverage depth across truss bays.
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
AfterCrawl Space Encapsulation & Vapor Barrier in Selma
Selma’s rapid growth during the 2000s-2020s construction boom left a legacy of slab homes with poorly detailed crawl spaces and additions where moisture control was an afterthought. The hot-humid summers and clay soils around the IH-35 corridor create standing water and humidity problems that degrade floor joists and invite mold. Crawl Space Encapsulation & Vapor Barrier is the systematic fix: sealing the earth and walls, conditioning the air, and documenting the result.
Crawl Space Vapor Barrier
Signs you need it
White or black mold on floor joists, musty odors rising through floor registers, or fiberglass insulation falling from the subfloor in saturated clumps.
What it costs in Selma
A 6-mil to 20-mil vapor barrier installed over bare earth in a typical Selma crawl space runs $1,800-$3,400.
How we do it
We remove debris, grade the earth for drainage, seam-seal the barrier with waterproof tape, and run it 6 inches up pier walls before fastening.
Crawl Space Encapsulation
Signs you need it
Standing water after rain, buckling hardwood floors, or HVAC ducts sweating in the crawl space during summer months.
What it costs in Selma
Full encapsulation with sealed vapor barrier, insulated walls, and conditioned air supply for a typical Selma home runs $4,200-$8,500.
How we do it
We install a reinforced polyethylene liner, seal all seams and penetrations, apply rigid foam to walls, and add a dehumidifier or supply-air vent per the home’s layout.
What Crawl Space Encapsulation & Vapor Barrier Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Vapor barrier (6-20 mil, earth only) | $1,800 - $3,400 |
| Partial encapsulation (walls + barrier) | $3,200 - $5,800 |
| Full encapsulation with dehumidification | $4,200 - $8,500 |
How long does crawl space encapsulation take in Selma?
Most Selma jobs finish in one to two days depending on access and square footage. We deliver a written scope before starting and a Documented Photo Record when we leave.
Will encapsulation fix my musty smell?
Yes, when the source is ground moisture evaporating into the crawl space. We verify humidity reduction with a hygrometer reading in your final documentation.
Radiant Barrier Installation in Selma
Selma’s attic temperatures routinely exceed 140°F from May through October, turning unconditioned attic spaces into radiant ovens that reverse-heat ceiling drywall and force AC systems to run continuously. Builder-grade homes along Olympia Parkway were rarely fitted with radiant barriers during original construction, leaving a significant gap in the thermal envelope that insulation alone cannot address. Radiant Barrier Installation reflects radiant heat before it enters the living space, reducing cooling loads measurably.
Attic Radiant Barrier
Signs you need it
Second-story rooms that stay hot after sunset, ductwork in the attic that feels warm to the touch, or cooling bills that spike disproportionately in July and August.
What it costs in Selma
Radiant barrier foil stapled to rafters or laid over attic insulation in a typical Selma home runs $1,400-$2,800.
How we do it
We install perforated foil across rafter bays or drape it over existing insulation, maintaining ventilation channels and avoiding compression that would reduce its reflectivity.
Radiant Barrier Roof Deck
Signs you need it
New roof installation planned, or existing roof deck visible during a re-roof, with no radiant barrier present and attic temperatures measured above 130°F.
What it costs in Selma
Spray-applied radiant barrier coating or foil-backed sheathing during roof replacement runs $2,200-$4,500 for typical Selma roof areas.
How we do it
We coordinate with your roofing contractor to apply low-emissivity coating or install foil-backed OSB during tear-off, documenting coverage with photos before the new roof covers it.
What Radiant Barrier Installation Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Attic radiant barrier (foil, existing attic) | $1,400 - $2,800 |
| Radiant barrier roof deck (during re-roof) | $2,200 - $4,500 |
| Radiant barrier with attic air sealing package | $2,800 - $5,200 |
Does radiant barrier work with my existing insulation?
Yes, it complements rather than replaces insulation by blocking radiant heat transfer that fiberglass and cellulose cannot stop. We measure attic temperature before and after to document the change.
Will radiant barrier help in winter?
Minimal effect in Selma’s mild winters; the primary benefit is summer cooling load reduction, which is where local energy bills concentrate.
Insulation Removal & Replacement in Selma
Selma’s builder-grade homes from the 2000s-2010s were often insulated with fiberglass batts that have since compacted, been disturbed by rodents, or contaminated by roof leaks that went undetected in vaulted attic spaces. Because these homes are young enough that homeowners assume the insulation is “fine,” we frequently find 15-year-old material performing at half its labeled R-value. Insulation Removal & Replacement starts with safe extraction and ends with verified new performance.
Attic Insulation Removal
Signs you need it
Insulation compressed below joist tops, visible water staining or mold on insulation surface, or rodent droppings and tunneling throughout the attic floor.
What it costs in Selma
Removal and disposal of existing attic insulation in a typical 1,800-2,400 sq ft Selma home runs $1,200-$2,400.
How we do it
We use high-capacity vacuum extraction with HEPA filtration, bag on-site, and dispose per Texas environmental guidelines, documenting the empty attic before any new material goes in.
Contaminated Insulation Removal
Signs you need it
Strong ammonia odor from rodent urine, visible mold growth extending through insulation depth, or insulation saturated from chronic roof or pipe leaks.
What it costs in Selma
Contaminated removal with sanitizing treatment of the attic deck runs $2,000-$3,800 in typical Selma homes.
How we do it
We remove all affected material, apply EPA-registered antimicrobial to exposed framing, and run air scrubbers during and after the process before installing new insulation.
What Insulation Removal & Replacement Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Standard attic insulation removal | $1,200 - $2,400 |
| Contaminated insulation removal + sanitizing | $2,000 - $3,800 |
| Removal + replacement with new R-38-R-49 | $3,400 - $6,200 |
Do I have to leave during insulation removal?
No, but we seal the attic access and run negative air machines to contain dust. Most Selma homeowners stay in the home during the work.
How do I know if my insulation is contaminated?
We inspect during our free estimate and show you photos of what we find. If there’s rodent activity or mold, we explain the scope before any removal begins.
Attic Air Sealing in Selma
Selma’s rapid-build subdivisions were constructed with minimal attention to air sealing at top plates, can lights, and duct penetrations - the 2021 Winter Storm Uri proved how costly that omission is when frozen pipes burst through poorly sealed exterior walls. A blower-door test on a typical Selma home from the 2010s often reads 4,000+ CFM50, indicating severe conditioned air loss that insulation alone cannot fix. Attic Air Sealing is the prerequisite step we complete before adding any insulation.
Top Plate & Penetration Sealing
Signs you need it
Dust streaks around ceiling drywall seams, rooms that are hard to keep cool despite new AC equipment, or visible gaps where wiring and plumbing enter the attic.
What it costs in Selma
Sealing top plates, wire penetrations, and plumbing stacks in a typical Selma attic runs $1,600-$3,000.
How we do it
We use two-part expanding foam and fire-rated caulk to seal every gap between conditioned space and attic, then re-test with the blower door to verify the reduction.
Can Light & Duct Boot Sealing
Signs you need it
Can lights that leak attic air into living spaces, or flex duct boots that have pulled away from ceiling registers, blowing 140°F attic air into rooms in summer.
What it costs in Selma
Sealing can light housings with fire-rated covers and re-securing duct boots runs $800-$1,800 in typical Selma homes.
How we do it
We install pre-formed fire-rated enclosures over non-IC cans, mastic-seal duct boots to drywall, and support flex duct to prevent future separation.
What Attic Air Sealing Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Top plate & penetration sealing | $1,600 - $3,000 |
| Can light & duct boot sealing | $800 - $1,800 |
| Full attic air sealing with blower-door verification | $2,400 - $4,500 |
Will air sealing make my house too tight?
No, we verify with the blower door that the home stays above minimum ventilation standards; most Selma homes have so much leakage that “too tight” is not a realistic risk.
Can you air seal without adding insulation?
Yes, though we typically recommend both because air sealing without adequate insulation leaves the thermal envelope incomplete. We quote each scope separately so you can decide.
Wall Insulation in Selma
Selma’s builder-grade tract homes were constructed with R-13 fiberglass batts in exterior walls, installed quickly and often compressed around wiring and plumbing that create thermal bypasses. The 2021 freeze showed how poorly these walls perform when temperatures drop, with pipes freezing in exterior walls that had no continuous insulation or proper air barrier. Wall Insulation retrofits address what the builder skipped.
Injection Foam Wall Insulation
Signs you need it
Walls that are cold to the touch in winter, rooms with significant temperature variation from interior walls, or high cooling bills despite adequate attic insulation.
What it costs in Selma
Injection foam insulation for exterior walls in a typical 1,800-2,400 sq ft Selma home runs $3,200-$5,800.
How we do it
We drill 2-inch holes through exterior siding or interior drywall at stud bay intervals, inject slow-rise foam to fill cavities without bowing framing, then patch and match finish.
Drill & Fill Wall Insulation
Signs you need it
Empty wall cavities confirmed by thermal imaging, or original insulation that has settled below the top plate leaving a 12-inch uninsulated zone.
What it costs in Selma
Drill and fill with dense-pack cellulose for empty or under-filled walls runs $2,400-$4,200 in typical Selma homes.
How we do it
We drill access holes, blow GreenFiber cellulose to 3.5 pounds per cubic foot density to prevent settling, and seal every hole with matching plugs or texture.
What Wall Insulation Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Injection foam (exterior walls) | $3,200 - $5,800 |
| Drill & fill cellulose (empty cavities) | $2,400 - $4,200 |
| Interior wall soundproofing | $1,800 - $3,400 |
Will injection foam damage my walls?
We use slow-rise formulations and monitor pressure to prevent bowing; in 9,000+ homes since 2016, we’ve had zero structural damage claims. Your written scope specifies the product and technique.
Can you insulate walls without removing drywall?
Yes, both injection foam and drill-and-fill cellulose are designed for retrofit through small access holes that we patch and finish to match.
Attic Cleaning & Rodent Proofing in Selma
Selma’s newer subdivisions with mature landscaping and proximity to green corridors have active rodent populations that exploit builder-grade construction gaps to nest in attics. We regularly find compressed, urine-soaked insulation in 10-15 year old homes where squirrels or roof rats entered through unsealed eave gaps and remained undetected for years. Attic Cleaning & Rodent Proofing removes the contamination and closes the entry paths.
Attic Cleanout & Sanitizing
Signs you need it
Visible rodent droppings across the attic floor, compressed insulation trails where animals nested, or a persistent organic odor that HVAC ductwork distributes through the home.
What it costs in Selma
Removal of contaminated insulation, debris cleanout, and antimicrobial treatment in a typical Selma attic runs $1,800-$3,400.
How we do it
We extract all contaminated material with HEPA vacuums, apply enzyme-based sanitizer to affected framing, and run air scrubbers until particulate counts drop to safe levels before any new work begins.
Rodent Proofing & Exclusion
Signs you need it
Scratching sounds in ceilings at dawn or dusk, visible chew marks on fascia boards, or recurring rodent activity after prior trapping or poisoning attempts.
What it costs in Selma
Comprehensive rodent exclusion with metal flashing, hardware cloth, and sealant for a typical Selma home runs $1,200-$2,600.
How we do it
We identify every entry point larger than 1/4 inch, install permanent metal barriers where rodents chew, seal with rodent-proof materials, and document each location with photos in your final record.
What Attic Cleaning & Rodent Proofing Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Attic cleanout + sanitizing | $1,800 - $3,400 |
| Rodent proofing & exclusion | $1,200 - $2,600 |
| Full restoration (cleanout + proofing + new insulation) | $4,200 - $7,800 |
How do I know if rodents are in my attic?
Listen for movement at dawn and dusk, check for droppings near attic access, and look for chew marks or compressed insulation trails. We confirm with inspection during our free estimate.
Will proofing keep rodents out permanently?
Our metal and hardware cloth barriers are permanent; we warranty the exclusion work and document every sealed entry point so you can verify the scope.
Home Energy Audit in Selma
A home energy audit in Selma identifies exactly where builder-grade construction shortcuts are costing you money, using blower-door tests and thermal imaging to make invisible problems visible. Because nearly every home in Selma shares the same construction era and methods, our audits consistently reveal the same pattern: excessive air leakage at top plates and can lights, attic insulation compacted to half its rated value, and ductwork losing conditioned air into 140°F attic cavities. Home Energy Audit gives you a prioritized scope with written pricing for each fix.
Blower Door Test
Signs you need it
Unexplained high energy bills, rooms that never reach set temperature, or a general sense that the home “leaks” despite appearing well-built.
What it costs in Selma
A standalone blower-door test with written report runs $350-$600 in Selma; the fee is credited toward any work we perform.
How we do it
We install a calibrated fan in an exterior door, depressurize the home to 50 Pascals, and measure CFM50 - the single number that quantifies total air leakage - then locate leaks with smoke pencils and infrared cameras.
Thermal Imaging Inspection
Signs you need it
Cold spots on exterior walls in winter, hot ceiling patches in summer, or suspicion that insulation is missing or compressed in specific areas.
What it costs in Selma
Thermal imaging as part of a full energy audit runs $450-$750; standalone inspection for specific problem areas runs $300-$500.
How we do it
We scan every exterior surface with a FLIR camera during controlled temperature differential conditions, marking thermal bridging and missing insulation directly on photos in your report.
What Home Energy Audit Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Blower door test (standalone) | $350 - $600 |
| Full energy audit with thermal imaging | $450 - $750 |
| Audit + written scope with prioritized pricing | $600 - $950 |
What does a home energy audit include in Selma?
Blower-door test, thermal imaging, insulation depth check, duct leakage assessment, and a written report with prioritized recommendations and flat pricing for each item. The audit fee applies to work we perform.
How long does a home energy audit take?
Plan on two to three hours for a typical Selma home; we need access to attic, crawl space, and all rooms. You receive the written report within 48 hours.
Brands We Service in Selma
We stock and install materials from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - no proprietary product lock-in means we specify what’s right for your home, not what’s in our warehouse. Most Selma jobs use materials sourced within 48 hours from San Antonio-area distributors. our brands
Pricing for Insulation in Selma, TX
| Service | Typical range in Selma |
|---|---|
| Crawl space vapor barrier | $1,800 - $3,400 |
| Full crawl space encapsulation | $4,200 - $8,500 |
| Attic radiant barrier | $1,400 - $2,800 |
| Radiant barrier roof deck | $2,200 - $4,500 |
| Attic insulation removal | $1,200 - $2,400 |
| Contaminated insulation removal | $2,000 - $3,800 |
| Top plate & penetration sealing | $1,600 - $3,000 |
| Full attic air sealing | $2,400 - $4,500 |
| Injection foam wall insulation | $3,200 - $5,800 |
| Drill & fill wall insulation | $2,400 - $4,200 |
| Attic cleanout & sanitizing | $1,800 - $3,400 |
| Home energy audit (full) | $450 - $750 |
Prices in Selma push higher when we encounter active rodent infestation requiring extensive sanitizing, limited attic access requiring hand-carry of materials, or homes with complex rooflines that multiply air-sealing labor. Every job still begins with a written price before any work starts - Haven Standard Clause 1, no exceptions.
Neighborhoods We Serve in Selma
We work in every Selma subdivision, with crews dispatched from our San Antonio office and typically on-site within the same day or next day for standard scheduling. Emergency calls are answered by a live person 24/7.
- Olympia Parkway corridor subdivisions
- Retama Ranch
- Selma Valley
- The Ridge at Selma
- Commons at Selma
Service Area - Cities Near Selma
Our crews serve the full I-35 corridor northeast of San Antonio, including New Braunfels, TX, Cibolo, TX, Seguin, TX, and Schertz, TX. Scheduling and dispatch are coordinated from our San Antonio office, with local crews assigned to each job based on current routing.
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 About Insulation in Selma
Most attic insulation retrofits and air sealing do not require a permit in Selma, though crawl space encapsulation and any work involving electrical or HVAC modifications may. We handle permit research as part of our written scope when it’s required.
We typically schedule estimates within 24-48 hours for Selma addresses, with emergency calls answered live 24/7. Standard jobs are usually scheduled within one week of estimate approval.
Selma’s newer subdivisions rarely restrict interior attic or crawl space work, though some communities require notice for exterior access or dumpster placement. We coordinate with your HOA when needed and document all communications.
Call (830) 243-6352 for a free estimate with a written price before any work starts. Every job includes a Documented Photo Record, and on applicable work we publish before-and-after blower-door numbers so you can verify the result.
What happens when you call
- 1A real person answersNo phone trees - talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically same-day.
- 4You approve before work beginsNothing starts until you say go.
What Selma Customers Say
"Two other companies quoted to blow more insulation on top of what was there. These were the only ones who said the existing material had to come out first, and explained why."
- Clifford E."Crawl space encapsulation done properly. Photographs of the vapour barrier at every seam, and the damp smell in the hallway is gone."
- Ainsley P."They air-sealed the attic floor before insulating and showed me the blower-door number before and after. The upstairs is finally the same temperature as downstairs."
- Marisol D.