Insulation in Selma, TX
Crawl space encapsulation and vapor barrier work in Selma starts with a problem most homeowners don’t see: the humid Gulf air migrating through vented crawl spaces and slab perimeter gaps, raising indoor humidity even when the AC runs constantly. In Selma’s 2000s-era production homes, code-minimum floor insulation was often fiberglass batts that sag, collect moisture, and fall away within a decade. We seal first, then insulate, and we document the before-and-after with blower-door numbers on every job. Call (830) 549-6646 for a written price before any work starts.
Why Selma Homes Are Different
Selma sits at the heart of the I-35 growth corridor northeast of San Antonio, where virtually the entire residential housing stock was built by production builders in the 2000s-2010s boom years using code-minimum insulation - typically R-30 attics, R-13 walls - that was never adequate for South Texas heat loads. Nearly every home in the city shares the same insulation deficiency at roughly the same age, making Selma a concentrated retrofit market rather than a mixed-vintage one.
The local climate amplifies every shortcoming. Summer attic temperatures routinely exceed 150°F and the cooling season spans roughly seven months, meaning underinsulated attics drive air conditioning systems to run nearly continuously and drastically shorten HVAC equipment life. The February 2021 freeze exposed how little cold-side performance these code-minimum installs provide, spurring a wave of insulation upgrade demand that is still ongoing. Homes near the I-35/Loop 1604 interchange deal with significant highway noise, and we’ve found that dense-pack wall insulation is frequently requested as much for sound attenuation as thermal performance.
Our Main Selma Services
Most calls from Selma homeowners start with one of these three services. Each has its own dedicated page with deeper pricing and project specifics.
Attic Insulation in Selma
Selma’s slab-on-grade, single-story brick homes lose the majority of conditioned air through the attic plane. We inspect for settled blown fiberglass, compressed batts, and unsealed top plates before recommending any insulation addition. Every attic job begins with air sealing, documented with blower-door readings, and closes with a photo record showing depth, coverage, and any problem areas we corrected. Attic Insulation in Selma covers full pricing and what to expect.
Spray Foam Insulation in Selma
Open-cell and closed-cell spray foam make sense in Selma for attic roof decks, unvented crawl spaces, and exterior walls where R-13 batts underperform against summer heat gain. We use Owens Corning and Demilec products, sourced through standard distribution, and we never lock homeowners into proprietary foam systems. The Haven Standard applies: written scope, written price, documented result. See Spray Foam Insulation in Selma for application-specific guidance.
Blown-In Insulation in Selma
Blown-in fiberglass or cellulose is the most common retrofit for Selma’s settled attic insulation, but we won’t blow new material over an unsealed attic floor. Top plates, can lights, duct boots, and penetrations get sealed first; then we blow to the target depth with a ruler photo every 100 square feet. GreenFiber cellulose is available for homeowners who prefer recycled-content material. Full details are on Blown-In Insulation in Selma.
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 humid subtropical climate and 2000s-era slab construction create a specific crawl space problem: even homes with minimal crawl areas suffer from soil moisture evaporation, especially where grading directs runoff toward the foundation. The clay soils common to the I-35 corridor hold water and release it slowly, meaning vapor drive is a year-round issue, not just during spring rains. We treat Crawl Space Encapsulation & Vapor Barrier as a building-envelope repair, not a maintenance add-on, and we start every job with a moisture-meter reading and written scope.
Crawl Space Vapor Barrier
Signs you need it
Condensation on ductwork, musty odors rising through floor registers, or fiberglass batts sagging and darkening in the crawl space indicate vapor barrier failure.
What it costs in Selma
Most Selma crawl space vapor barrier installations run between $1,200 and $2,800 depending on square footage, pier count, and whether existing debris removal is needed.
How we do it
We remove old material, grade the soil surface, lay 6-mil or thicker reinforced polyethylene with sealed seams and mechanical fastening at walls and piers, then tape all penetrations before photographing the completed barrier.
Crawl Space Encapsulation
Signs you need it
Standing water after rains, mold on floor joists, or hardwood cupping above the crawl space means full encapsulation is needed, not just a vapor barrier.
What it costs in Selma
Complete crawl space encapsulation in Selma typically ranges from $3,500 to $7,500 for conditioned perimeter walls, sealed vents, dehumidifier sizing, and drainage mat installation.
How we do it
We seal all vents, install rigid foam board on perimeter walls, lay drainage mat and reinforced liner across the floor, install a dedicated dehumidifier with condensate pump, and provide before-and-after humidity readings.
What Crawl Space Encapsulation & Vapor Barrier Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Crawl space vapor barrier (6-mil, standard layout) | $1,200 - $2,800 |
| Full crawl space encapsulation with dehumidifier | $3,500 - $7,500 |
| Crawl space insulation (rigid foam board, walls) | $2,000 - $4,500 |
How long does crawl space encapsulation take in Selma?
Most Selma crawl space encapsulations are completed in two to three days. Vapor barrier-only jobs typically finish in one day. We coordinate access with you and leave a documented photo record.
Will encapsulation fix my musty smell?
Yes, when the source is soil moisture evaporating into the crawl space. We measure relative humidity before and after; if odors persist, we investigate HVAC duct leakage or plumbing issues.
Radiant Barrier Installation in Selma
Selma’s 150°F peak attic temperatures and seven-month cooling season make radiant barrier one of the most cost-effective envelope upgrades for local homeowners. Production builders in the 2000s-2010s boom rarely installed radiant barrier roof decking or foil, leaving attics to absorb and reradiate heat directly into conditioned space through the ceiling plane. We install Radiant Barrier Installation as a standalone service or paired with air sealing and insulation upgrades, and we measure attic surface temperatures before and after to document the change.
Attic Radiant Barrier
Signs you need it
Ceiling surfaces that stay warm to the touch after sunset, AC running continuously past 8 PM, or upstairs rooms that never reach setpoint indicate excessive radiant heat gain from the attic.
What it costs in Selma
Attic radiant barrier installation in Selma typically runs $1,500 to $3,200 for a standard single-story home, depending on attic complexity and whether we combine it with air sealing.
How we do it
We staple perforated radiant barrier foil across attic truss bottom chords or rafter bays, maintaining ventilation channels and avoiding compression against electrical fixtures, then photograph coverage and any obstructions.
Radiant Barrier & Ventilation
Signs you need it
Attic air that feels stagnant even with existing vents, or shingles that curl prematurely from excessive deck heat, suggest radiant barrier should be paired with improved intake and exhaust ventilation.
What it costs in Selma
Radiant barrier with ventilation upgrades in Selma generally costs $2,200 to $4,500, including additional soffit vents, ridge vent extension, or powered exhaust if static ventilation is insufficient.
How we do it
We calculate net free vent area against attic square footage, install balanced intake and exhaust, then apply radiant barrier foil with proper air gaps, documenting vent locations and flow paths.
What Radiant Barrier Installation Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Attic radiant barrier foil (standard single-story) | $1,500 - $3,200 |
| Radiant barrier with ventilation upgrade | $2,200 - $4,500 |
| Radiant barrier roof deck (new construction or reroof) | $2,800 - $5,500 |
Does radiant barrier work with existing insulation?
Yes, and it works best when the attic floor is already sealed. We install radiant barrier above the insulation plane and verify that it doesn’t compress existing material or block soffit airflow.
How much will my attic temperature drop?
Attic surface temperatures typically drop 20-35°F with proper radiant barrier installation. We measure deck and truss temperatures before and after, and include the readings in your documented record.
Insulation Removal & Replacement in Selma
Selma’s 15-25-year-old production homes often contain insulation that has settled, compressed, or been compromised by roof leaks, rodent activity, or previous HVAC work. Builder-grade blown fiberglass in these attics frequently measures 30-50% below labeled R-value due to settling and disturbance. We provide Insulation Removal & Replacement as a complete service, not a disposal add-on, and we inspect the attic deck for air leaks and structural issues before any new material goes in.
Attic Insulation Removal
Signs you need it
Insulation that measures below the top of joists, visible water staining, or compressed paths where technicians have walked repeatedly indicate removal and replacement is more effective than topping off.
What it costs in Selma
Attic insulation removal in Selma typically costs $1.00 to $2.50 per square foot, with most single-story homes falling between $1,200 and $3,000 for complete removal and disposal.
How we do it
We use commercial vacuums with HEPA filtration and bagged collection, protect finished spaces below with containment sheeting, inspect the deck for leaks or pest entry, and photograph the bare attic before any repairs.
Contaminated Insulation Removal
Signs you need it
Strong urine odor, visible droppings, or insulation that clumps and darkens from moisture and organic matter requires removal with PPE and decontamination protocols, not standard vacuuming.
What it costs in Selma
Contaminated insulation removal in Selma runs $2.50 to $4.50 per square foot, with total project costs typically $3,000 to $6,500 depending on contamination extent and required sanitizing.
How we do it
We suit in full PPE, use sealed negative-air equipment, remove all compromised material, apply enzymatic sanitizer to affected deck areas, and hold new insulation until the attic passes a post-clean inspection.
What Insulation Removal & Replacement Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Standard attic insulation removal | $1,200 - $3,000 |
| Contaminated insulation removal | $3,000 - $6,500 |
| Insulation replacement (blown fiberglass, R-38) | $1,800 - $3,500 |
Can you remove insulation without making a mess?
Yes. We contain the work area, use bagged collection, and run HEPA-negative air during removal. The documented photo record shows the attic condition before we leave.
Do I need to leave during removal?
Not for standard removal, though we recommend it for heavily contaminated attics due to equipment noise and temporary odor. We coordinate timing and access in advance.
Attic Air Sealing in Selma
Selma’s 2000s-era production homes were built with minimal attention to the attic pressure boundary: top plates, electrical penetrations, and duct boots were left unsealed, creating a direct path for conditioned air to escape into the vented attic. In summer, this leaks 140°F attic air inward; in winter, it drives moisture and heat loss. We treat Attic Air Sealing as mandatory preparation for any insulation work, and we publish blower-door numbers on every job so homeowners see the actual air leakage reduction.
Top Plate & Penetration Sealing
Signs you need it
Dust streaks around ceiling fixtures, cobwebs concentrated at wall-ceiling joints, or rooms that are consistently harder to heat or cool indicate top plate and penetration leakage.
What it costs in Selma
Top plate and penetration sealing in Selma typically runs $800 to $2,000 for a standard single-story home, depending on wall linear footage and electrical/plumbing penetration count.
How we do it
We access top plates by moving existing insulation, apply fire-rated caulk or foam to all gaps, seal wire and pipe penetrations with appropriate materials, and verify with blower-door testing before replacing insulation.
Can Light & Duct Boot Sealing
Signs you need it
Can lights that show attic dust on the trim, or supply registers that blow noticeably cooler air in some rooms than others, point to duct boot and fixture leakage.
What it costs in Selma
Can light and duct boot sealing in Selma generally costs $600 to $1,800, including cover installation for non-IC-rated fixtures and mastic sealing of all flex duct connections.
How we do it
We install fire-rated covers over can lights, seal duct boots with mastic and mechanical fasteners, test for leakage with a duct blaster when indicated, and photograph each sealed location.
What Attic Air Sealing Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Top plate and penetration sealing | $800 - $2,000 |
| Can light and duct boot sealing | $600 - $1,800 |
| Full attic air sealing (comprehensive) | $1,500 - $3,500 |
What is a blower-door test?
A blower-door test is a pressurization reading that shows, in one number, how much air your building envelope is losing. We run it before and after sealing; typical Selma homes drop from 3,500-5,000 CFM50 to 2,000-3,000 CFM50.
Can air sealing be done without adding insulation?
Yes, and we recommend it as a standalone service for homes with adequate insulation depth but persistent comfort issues. The written scope specifies exactly what gets sealed and what blower-door result you receive.
Wall Insulation in Selma
Selma’s R-13 batt wall insulation, standard in 2000s production builds, performs poorly against summer heat gain and provides minimal sound attenuation for homes near I-35 and Loop 1604. The 2×4 framing common to these homes limits cavity depth, but dense-pack cellulose or injection foam can achieve effective R-values well above batt performance while reducing highway noise transmission. We provide Wall Insulation as both a thermal upgrade and an acoustic solution, and we explain the trade-offs between each approach in the written scope.
Injection Foam Wall Insulation
Signs you need it
Exterior walls that radiate heat indoors by mid-afternoon, or rooms with western exposure that never reach setpoint despite adequate attic insulation, indicate wall cavity underperformance.
What it costs in Selma
Injection foam wall insulation in Selma typically costs $3.50 to $6.00 per square foot of wall area, with most whole-home projects ranging from $4,500 to $9,000.
How we do it
We drill 5/8-inch holes at stud spacing, inject slow-rise foam to fill cavities without bowing drywall, patch and texture-match holes, and verify fill completeness with thermal imaging.
Drill & Fill Wall Insulation
Signs you need it
Rooms where you can hear conversation through walls, or homeowners who bought near the interstate for convenience but now struggle with traffic noise, benefit from dense-pack drill and fill.
What it costs in Selma
Dense-pack drill and fill with cellulose in Selma runs $2.50 to $4.50 per square foot, with typical whole-home acoustic upgrades between $3,500 and $7,000.
How we do it
We drill access holes, dense-pack GreenFiber cellulose to 3.5 pounds per cubic foot for sound attenuation, patch with matching texture, and provide STC improvement estimates based on assembly testing.
What Wall Insulation Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Injection foam wall insulation | $4,500 - $9,000 |
| Dense-pack drill and fill (cellulose) | $3,500 - $7,000 |
| Exterior wall insulation (partial, one or two walls) | $1,800 - $4,000 |
Will wall insulation help with highway noise?
Yes. Dense-pack cellulose at proper density adds 5-10 STC points to a standard 2×4 wall assembly. We specify the expected acoustic improvement in the written scope for homes near I-35.
Do you have to tear out drywall?
No. Drill-and-fill methods access cavities through small exterior or interior holes that we patch and texture-match. The documented photo record shows before, during, and patched condition.
Attic Cleaning & Rodent Proofing in Selma
Selma’s mature suburban canopy and proximity to greenbelt corridors create persistent rodent pressure on 2000s-era homes with unsealed attic vents, construction gaps, and deteriorating fascia. Once rodents access an attic, they compress and contaminate insulation, creating a cycle of odor, allergen exposure, and energy loss that simple trapping cannot resolve. We provide Attic Cleaning & Rodent Proofing as a complete service: exclusion first, then cleanup, then restoration of the thermal barrier.
Rodent Proofing & Exclusion
Signs you need it
Scratching sounds at dawn or dusk, visible gnaw marks on fascia or vents, or insulation compressed into trail patterns indicate active rodent access that trapping alone won’t stop.
What it costs in Selma
Rodent proofing and exclusion in Selma typically runs $1,500 to $3,500 for a standard single-story home, including all entry point sealing, vent screening, and one-year revisit guarantee.
How we do it
We inspect roofline, soffits, vents, and utility penetrations with ladders and pole cameras, seal all entry points with rodent-proof materials, install vent screens, and photograph every sealed location.
Attic Sanitizing & Decontamination
Signs you need it
Persistent urine odor after trapping, visible droppings in insulation, or family members with worsening allergies when the HVAC runs suggest attic contamination requiring professional decontamination.
What it costs in Selma
Attic sanitizing and decontamination in Selma generally costs $2,000 to $4,500 depending on square footage, contamination depth, and whether insulation removal is required before treatment.
How we do it
We remove compromised insulation, apply enzymatic sanitizer to all deck surfaces, treat with odor-neutralizing agent, and hold the attic empty until moisture and contamination testing pass before reinstalling insulation.
What Attic Cleaning & Rodent Proofing Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Rodent proofing and exclusion | $1,500 - $3,500 |
| Attic sanitizing and decontamination | $2,000 - $4,500 |
| Attic restoration (cleaning, proofing, re-insulation) | $4,500 - $9,000 |
How do I know if rodents are in my attic?
Listen for scratching at dawn and dusk, check for droppings near attic hatches, and look for compressed insulation trails. We inspect with pole cameras and document findings before proposing work.
Will they come back after you seal?
Our exclusion work carries a one-year guarantee. If rodents re-enter through any sealed point, we return at no charge. The documented photo record shows exactly what was sealed and when.
Home Energy Audit in Selma
Selma’s uniformly underinsulated housing stock makes home energy audits particularly valuable: nearly every home in the city has the same predictable deficiencies, but the severity varies with maintenance history, roof condition, and homeowner modifications. A proper audit identifies which envelope repairs will yield actual comfort improvement versus which are speculative. We provide Home Energy Audit as a diagnostic service with written recommendations, priority-ranked by cost-effectiveness, and we include blower-door and thermal imaging documentation that homeowners can use for any contractor’s scope review.
Blower Door Test
Signs you need it
Rooms that are consistently uncomfortable, high utility bills without obvious cause, or planning for insulation work without knowing current air leakage all warrant a blower-door baseline measurement.
What it costs in Selma
A standalone blower-door test in Selma typically costs $300 to $500, or is included at no additional charge when bundled with a full home energy audit.
How we do it
We install a calibrated fan in an exterior door, depressurize the home to 50 Pascals, measure CFM50 leakage, and identify dominant leakage paths with smoke pencils and thermal imaging.
Thermal Imaging Inspection
Signs you need it
Visible temperature variations on ceilings or walls, suspicion of missing insulation in vaulted ceilings, or post-storm water intrusion assessment all benefit from infrared documentation.
What it costs in Selma
Thermal imaging inspection in Selma runs $250 to $450 as a standalone service, and is standard equipment on every full audit we perform.
How we do it
We scan all envelope surfaces with a FLIR camera during normal heating or cooling operation, mark thermal anomalies on photos, and correlate findings with visual inspection and blower-door results.
What Home Energy Audit Costs in Selma
| Item | Typical range in Selma |
|---|---|
| Standalone blower-door test | $300 - $500 |
| Thermal imaging inspection | $250 - $450 |
| Full home energy audit (comprehensive) | $400 - $800 |
What does a home energy audit include?
A full audit includes blower-door test, thermal imaging, insulation inspection, duct leakage assessment, and a written priority list of envelope repairs with estimated savings. The report is yours to keep.
Can I use the audit with another contractor?
Yes. The report is a standalone document. We also offer a Free Second Opinion on any written estimate you bring us, and we’ll read it with you line by line.
Brands We Service in Selma
We source insulation and air-sealing materials from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber. No proprietary lock-in means we specify the right product for each Selma home’s condition and your preference. See our brands for application guidance.
Pricing for Insulation in Selma, TX
| Service | Typical range in Selma |
|---|---|
| Crawl space vapor barrier | $1,200 - $2,800 |
| Full crawl space encapsulation | $3,500 - $7,500 |
| Attic radiant barrier | $1,500 - $3,200 |
| Radiant barrier with ventilation | $2,200 - $4,500 |
| Standard attic insulation removal | $1,200 - $3,000 |
| Contaminated insulation removal | $3,000 - $6,500 |
| Top plate and penetration sealing | $800 - $2,000 |
| Full attic air sealing | $1,500 - $3,500 |
| Injection foam wall insulation | $4,500 - $9,000 |
| Dense-pack drill and fill | $3,500 - $7,000 |
| Rodent proofing and exclusion | $1,500 - $3,500 |
| Full home energy audit | $400 - $800 |
Price drivers in Selma include attic accessibility (scissor trusses versus conventional), contamination level requiring PPE protocols, and the extent of air sealing needed before insulation can be added. Every job begins with a written price under Haven Standard Clause 1; no work starts without it.
Neighborhoods We Serve in Selma
We work throughout Selma’s residential areas, from the original subdivisions near the Retama Park corridor to newer infill near the I-35/Loop 1604 interchange. Crews dispatch from our San Antonio office and typically arrive within scheduled windows for all Selma appointments.
- Retama Park area
- I-35/Loop 1604 corridor
- Evans Road vicinity
- Lookout Road subdivisions
- Main Street corridor residential
Service Area - Cities Near Selma
Envelope Insulation Co. serves the full I-35 and 1604 corridor northeast of San Antonio, including Seguin, TX, New Braunfels, TX, Cibolo, TX, and Schertz, TX. Scheduling and dispatch are coordinated from our San Antonio office; crews carry Selma-appropriate materials and equipment for same-day starts when the scope is approved.
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 and air sealing in Selma does not require a permit, but crawl space encapsulation and spray foam applications sometimes do depending on scope. We verify requirements before work starts and include any permit costs in the written price.
Most Selma projects start within one to two weeks of written scope approval. Emergency situations, such as post-storm water intrusion or failed HVAC related to envelope failure, can sometimes be accommodated sooner. A live person answers calls 24/7.
Attic and crawl space work is typically not visible from the exterior and does not trigger HOA review. Wall insulation and exterior modifications may require notice; we photograph existing conditions and can provide scope documentation for your board if needed.
Call (830) 549-6646 for a free estimate. We’ll schedule a site visit, provide a written price before any work starts, and leave you with a documented photo record and, on applicable jobs, before-and-after blower-door numbers that show exactly what changed.
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 within 60-minute.
- 4You approve before work beginsNothing starts until you say go.
What Selma Customers Say
"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."The winter gas bill dropped by about a third. They had estimated a quarter, so they under-promised."
- Genevieve R."Crawl space encapsulation done properly. Photographs of the vapour barrier at every seam, and the damp smell in the hallway is gone."
- Ainsley P.