Insulation in Castle Hills, TX
Most crawl space encapsulation and vapor barrier jobs in Castle Hills run between $3,500 and $8,500, with full encapsulations on larger 1950s ranch homes trending toward the upper end. We’re Envelope Insulation Co., and we treat air sealing as a hard prerequisite, not an upsell - every job starts with a written price and ends with a documented photo record. If your Castle Hills home still has its original crawl space conditions from the 1960s, you’re likely dealing with moisture migration, musty indoor air, and energy bills that spike every summer when the San Antonio Basin heat settles in. Call (830) 420-0953 and we’ll walk your crawl space with you.
Why Castle Hills Homes Are Different
Castle Hills is a pocket municipality completely encircled by San Antonio yet operating its own independent building department. Insulation permits must be pulled through Castle Hills City Hall, not San Antonio’s Development Services, a distinction that routinely trips up contractors who don’t know the market. We’ve seen stop-work orders issued on attic overhauls because a crew filed for the wrong permit.
The housing stock here is dominated by 1950s-1960s ranch homes where original fiberglass batts have been compressing and off-gassing for 60-plus years. Shallow attic cavities, no original vapor barrier in many cases, and wood-frame walls with little to no cavity insulation are the norm. Castle Hills routinely logs 100 or more consecutive days above 90°F, and the February 2021 Winter Storm Uri freeze demonstrated how poorly these older homes retain heat. The dominant job type here is full attic re-insulation on homes that were never adequately insulated to begin with.
Our Main Castle Hills Services
Castle Hills homeowners call us most often for attic work and spray foam. Here is what each job looks like in this market.
Attic Insulation in Castle Hills
Most Castle Hills attics we enter still carry original fiberglass batts rated at R-19 or lower, compressed to R-11 or worse. We remove the degraded material, seal top plates and penetrations, then install new insulation to current code. Every attic job includes a blower-door test so you can see the air-leakage reduction in CFM50. Attic Insulation in Castle Hills covers our full process, material options from Owens Corning and Johns Manville, and what the photo documentation includes.
Spray Foam Insulation in Castle Hills
Spray foam makes sense in Castle Hills for rim joists, crawl space walls, and attic conversions where batts cannot seal complex geometry. We specify open-cell or closed-cell based on the assembly, never as a default. Every spray foam scope includes the written price, the target R-value, and the before-and-after air-sealing numbers. Spray Foam Insulation in Castle Hills breaks down where foam pays back fastest in these older ranch homes.
Blown-In Insulation in Castle Hills
Blown-in cellulose or fiberglass is our most common retrofit for Castle Hills attics because it fills irregular cavities and covers over the compressed legacy batts. We blow only after air sealing is complete - blowing over an unsealed attic floor is something we won’t do. The Haven Standard requires it. Blown-In Insulation in Castle Hills explains density, coverage, and how we document depth with photos.
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 Castle Hills
The 1950s-1970s ranch homes that define Castle Hills were built with vented crawl spaces and no vapor barrier, a combination that fails badly in the San Antonio Basin’s extended heat and humidity cycles. We regularly find moisture levels above 20% wood moisture content in Castle Hills crawl spaces, with fiberglass batts hanging wet and compressed between joists. Crawl Space Encapsulation & Vapor Barrier is our primary service here because it solves the root problem - ground moisture and outside air - rather than treating symptoms.
Crawl Space Vapor Barrier
Signs you need it
Your crawl space has standing water after rain, visible mold on joists, or a musty smell that rises through floor registers.
What it costs in Castle Hills
A 6-mil to 20-mil vapor barrier installation in Castle Hills typically runs $1,200-$3,500 depending on square footage, pier count, and whether we need to grade the soil first.
How we do it
We remove debris, grade and level the ground, seam-seal a reinforced polyethylene sheet across the entire floor, extend it 6-12 inches up piers and walls, and seal all seams with waterproof tape.
Crawl Space Encapsulation
Signs you need it
Your HVAC ducts sweat in summer, your floors feel cold in winter despite the heat running, or you’ve had rodent activity under the house.
What it costs in Castle Hills
Full encapsulation with closed-cell spray foam on walls, a vapor barrier floor, and a dehumidifier typically ranges $5,000-$12,000 for Castle Hills ranch homes.
How we do it
We seal all vents, apply closed-cell foam to foundation walls, install the vapor barrier floor system, add a condensate-pumped dehumidifier, and provide before-and-after moisture readings.
What Crawl Space Encapsulation & Vapor Barrier Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Vapor barrier (6-20 mil, floor only) | $1,200 - $3,500 |
| Partial encapsulation (walls + floor, no dehumidifier) | $3,500 - $6,500 |
| Full encapsulation with dehumidifier | $5,000 - $12,000 |
How long does crawl space encapsulation take in Castle Hills?
Most vapor barrier jobs finish in one day; full encapsulations with foam and dehumidifier take two to three days. We pull the Castle Hills permit before we arrive, so there’s no delay.
Will encapsulation fix my musty smell?
Yes, if the smell originates from crawl space moisture and mold. We include sanitizing and a documented photo record showing before and after conditions. Call (830) 420-0953 for a free estimate.
Radiant Barrier Installation in Castle Hills
Castle Hills sits in the San Antonio Basin and routinely logs 100 or more consecutive days above 90°F, putting extreme radiant heat load on aging attics. The 1950s-1960s ranch homes here typically have dark shingle roofs with no reflective decking and minimal insulation, turning attics into 140°F ovens that force HVAC systems to run continuously. Radiant Barrier Installation blocks that radiant transfer and can reduce cooling loads by 5-10% when properly installed.
Attic Radiant Barrier
Signs you need it
Your attic temperature exceeds 130°F in July, your upstairs rooms never cool evenly, or your AC runs non-stop from 2 PM to sunset.
What it costs in Castle Hills
Radiant barrier foil draped over rafters or stapled to roof deck in Castle Hills attics typically costs $1,500-$3,500 for a standard ranch home.
How we do it
We install perforated aluminum foil across rafter bays, maintaining the required air gap, and verify with an infrared thermometer to confirm surface temperature reduction.
Radiant Barrier & Ventilation
Signs you need it
Your attic has no ridge vent, your soffits are blocked by insulation, or you see mold on roof sheathing from trapped moisture.
What it costs in Castle Hills
Radiant barrier plus passive ventilation upgrades in Castle Hills typically run $2,500-$5,500 depending on roof geometry and existing venting.
How we do it
We clear soffit vents, add baffles where needed, install the radiant barrier, and verify airflow with a smoke pencil to confirm the ventilation path is open.
What Radiant Barrier Installation Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Attic radiant barrier (foil over rafters) | $1,500 - $3,500 |
| Radiant barrier with ventilation correction | $2,500 - $5,500 |
| Radiant barrier roof deck (new construction or re-roof) | $3,000 - $6,500 |
Does radiant barrier work with existing insulation?
Yes, it works best when paired with adequate attic insulation - we verify your current R-value and air sealing before installing the barrier.
How much will my cooling bill drop?
Most Castle Hills homeowners see 5-10% cooling reduction; the biggest gains come on homes with dark roofs and poor attic ventilation. Call (830) 420-0953 for a free estimate and written price.
Insulation Removal & Replacement in Castle Hills
The vast majority of Castle Hills homes were built between 1950 and 1970 with original fiberglass batts that have settled well below code-minimum R-values after 60-plus years of compression and off-gassing. We regularly remove insulation that tests positive for rodent contamination, water damage from past roof leaks, or vermiculite that may contain asbestos - a material common in pre-1990 installations. Insulation Removal & Replacement is often the first step before we can properly air seal and reinsulate.
Attic Insulation Removal
Signs you need it
Your attic insulation is compressed below the joist tops, smells of urine or mildew, or contains visible rodent droppings and tunnels.
What it costs in Castle Hills
Attic insulation removal in Castle Hills typically runs $1,500-$4,000 depending on square footage, access difficulty, and whether hazardous materials are present.
How we do it
We set up negative air pressure with HEPA filtration, bag all material in the attic, dispose per TCEQ guidelines, and provide photos of the cleaned deck before any new work begins.
Contaminated Insulation Removal
Signs you need it
You’ve had a roof leak that soaked insulation, discovered mold on roof sheathing, or found rodent nests embedded in the material.
What it costs in Castle Hills
Contaminated removal with sanitizing and deodorizing in Castle Hills typically costs $2,500-$6,000, with hazmat protocols adding to base removal rates.
How we do it
We treat the space with an EPA-registered antimicrobial, remove all compromised material, HEPA-vacuum the deck and framing, and document with photos before reinsulating.
What Insulation Removal & Replacement Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Standard attic insulation removal | $1,500 - $4,000 |
| Contaminated insulation removal + sanitizing | $2,500 - $6,000 |
| Removal + replacement with new insulation | $4,000 - $10,000 |
Is it cheaper to remove and replace or just add new insulation on top?
Adding on top is cheaper short-term but violates our air-sealing-first protocol - we won’t blow new material over unsealed, contaminated decks. The written scope will show both options.
How do I know if my old insulation has asbestos?
Vermiculite insulation, common before 1990, requires lab testing; we collect samples and wait for results before disturbing anything. Call (830) 420-0953 for a free assessment.
Attic Air Sealing in Castle Hills
Castle Hills ranch homes from the 1950s-1960s were built with minimal attention to the building envelope - top plates were left unsealed, can lights cut into ceilings with no airtight housings, and duct boots connected to drywall with gaps you can slide a ruler through. The February 2021 Winter Storm Uri freeze demonstrated how poorly these homes retain heat, and the summer cooling loads are equally punishing. Attic Air Sealing is the single most cost-effective upgrade we offer because it addresses the leakage paths that bypass insulation entirely.
Top Plate & Penetration Sealing
Signs you need it
You feel drafts from outlets on exterior walls, see dust streaks around ceiling fixtures, or your blower-door test shows excessive leakage at the attic floor.
What it costs in Castle Hills
Top plate and penetration sealing in Castle Hills typically runs $800-$2,500 for a standard ranch, depending on wall length and penetration count.
How we do it
We access the attic perimeter, seal all top plate joints with acoustical sealant, foam around wire and pipe penetrations, and verify with a blower-door test to measure the reduction in CFM50.
Can Light & Duct Boot Sealing
Signs you need it
Your can lights flicker in wind, your ducts blow conditioned air into the attic, or you see insulation dust blown back through ceiling grilles.
What it costs in Castle Hills
Sealing can lights with airtight covers and duct boots with mastic in Castle Hills typically costs $600-$2,000 depending on fixture count and duct configuration.
How we do it
We install fire-rated airtight boxes over non-IC can lights, seal duct boots with mastic and mesh, and pressure-test the duct system to confirm no attic leakage remains.
What Attic Air Sealing Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Top plate and penetration sealing | $800 - $2,500 |
| Can light and duct boot sealing | $600 - $2,000 |
| Full attic air sealing (comprehensive) | $2,000 - $5,000 |
Can air sealing alone lower my energy bills?
Yes - we’ve seen 15-25% reduction in Castle Hills homes where leakage was severe, though we always pair sealing with insulation for lasting performance.
How do you prove the sealing worked?
We provide before-and-after blower-door numbers in CFM50, plus the documented photo record showing every sealed location. Call (830) 420-0953 for a free estimate.
Wall Insulation in Castle Hills
Many Castle Hills homes have original wood-frame walls with little to no cavity insulation - the 1950s building codes didn’t require it, and few owners have addressed it since. The result is exterior walls that radiate heat inward all summer and bleed conditioned air outward in winter, creating the temperature stratification that makes some rooms unusable. Wall Insulation retrofitted from the interior or exterior can bring these walls up to modern performance without gutting the house.
Drill & Fill Wall Insulation
Signs you need it
Your exterior walls feel hot to the touch in summer, your rooms have more than a 5-degree temperature difference, or you’ve verified empty cavities with a thermal camera.
What it costs in Castle Hills
Drill-and-fill with cellulose or fiberglass in Castle Hills walls typically runs $2,000-$5,500 for a standard ranch, depending on wall area and exterior finish type.
How we do it
We drill 2-inch holes at stud bay intervals, blow insulation to verified density, plug with matching material, and texture-match the repair - interior drywall or exterior siding.
Injection Foam Wall Insulation
Signs you need it
Your walls have some existing batt insulation that’s compressed or incomplete, or you need higher R-value in a limited cavity depth.
What it costs in Castle Hills
Injection foam for Castle Hills walls typically costs $3,500-$8,000, with tighter cavities and two-story sections trending higher.
How we do it
We inject slow-rise foam through controlled ports, monitor expansion to prevent bowing, and verify fill with thermal imaging from both sides of the wall.
What Wall Insulation Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Drill & fill (cellulose or fiberglass) | $2,000 - $5,500 |
| Injection foam walls | $3,500 - $8,000 |
| Exterior wall insulation (removal + re-insulate) | $5,000 - $12,000 |
Will drill-and-fill damage my walls?
We patch every hole with matching material and texture; on painted drywall, the repair is typically invisible after repainting the wall.
Can you insulate walls without removing drywall?
Yes - drill-and-fill and injection foam both access cavities through small holes from inside or outside. Call (830) 420-0953 for a free assessment and written price.
Attic Cleaning & Rodent Proofing in Castle Hills
The mature oak canopy and established neighborhoods of Castle Hills create ideal conditions for roof rats and squirrels, which find easy entry through the aging fascia and soffits of 1960s ranch homes. Once inside, they compress insulation for nesting, contaminate it with droppings, and create entry paths for moisture and outside air that undermine the entire envelope. Attic Cleaning & Rodent Proofing restores the space to a clean, sealed condition before any new insulation goes in.
Attic Cleanout & Sanitizing
Signs you need it
You hear scratching at night, find droppings in the attic, or smell ammonia when the HVAC runs.
What it costs in Castle Hills
Attic cleanout with HEPA vacuuming and sanitizing in Castle Hills typically runs $1,200-$3,500 depending on contamination level and attic square footage.
How we do it
We remove all contaminated material, HEPA-vacuum the entire surface, apply enzyme-based deodorizer, and provide photos of the sanitized deck before any repairs.
Rodent Proofing & Exclusion
Signs you need it
You’ve had repeated pest control treatments but the rodents return, or you can see gaps larger than a quarter inch at roof junctions and vents.
What it costs in Castle Hills
Rodent proofing with metal flashing, hardware cloth, and sealant in Castle Hills typically costs $800-$2,500 for a standard ranch with moderate entry points.
How we do it
We inspect every roof penetration, seal with rodent-proof materials, install vent guards, and provide a written map of every entry point found and sealed.
What Attic Cleaning & Rodent Proofing Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Attic cleanout and sanitizing | $1,200 - $3,500 |
| Rodent proofing and exclusion | $800 - $2,500 |
| Full attic restoration (cleanout + proofing + re-insulate) | $4,000 - $10,000 |
How do I know the rodents won’t come back?
We guarantee our exclusion work for one year; if they breach our seals, we return at no charge under the 365-Day Done Right Promise.
Do you remove dead animals?
Yes, we locate and remove carcasses, treat the area with deodorizer, and seal the entry point they used. Call (830) 420-0953 for a free estimate.
Home Energy Audit in Castle Hills
A home energy audit in Castle Hills reveals what decades of patchwork repairs and original construction shortcuts have hidden - ductwork leaking into vented attics, walls with no insulation, and air leakage rates double or triple what current code allows. The 1950s-1960s ranch homes here were built when energy was cheap and envelopes were an afterthought; an audit gives you a prioritized, written scope instead of guessing which upgrade matters first. Home Energy Audit is where every major job we do begins, because we won’t write a price for work that isn’t measured.
Blower Door Test
Signs you need it
Your energy bills are 30% higher than neighbors with similar homes, you feel drafts you can’t locate, or you’re considering insulation but don’t know where to start.
What it costs in Castle Hills
A standalone blower-door test in Castle Hills typically runs $300-$600; when bundled with thermal imaging and a full audit report, $500-$900.
How we do it
We depressurize the house to 50 Pascals, measure total leakage in CFM50, then use a smoke pencil to locate the dominant leakage paths while the fan runs.
Thermal Imaging Inspection
Signs you need it
Some rooms never reach set temperature, your exterior walls show hot or cold spots, or you suspect missing insulation behind finished surfaces.
What it costs in Castle Hills
Thermal imaging as part of a full audit in Castle Hills is typically included in the $500-$900 comprehensive package; standalone imaging runs $250-$500.
How we do it
We scan every exterior surface with a FLIR camera during normal heating or cooling operation, marking thermal bridges and insulation voids on photos you receive in the report.
What Home Energy Audit Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Blower-door test (standalone) | $300 - $600 |
| Thermal imaging inspection | $250 - $500 |
| Comprehensive home energy audit | $500 - $900 |
Will the audit tell me what to fix first?
Yes - you receive a prioritized scope ranked by cost-effectiveness, with estimated savings and payback periods for each upgrade.
Do I need an audit before getting insulation quotes?
We require it for our own quotes because we won’t sell insulation to a home that needs air sealing first; bring us any competing quote for a free second opinion. Call (830) 420-0953.
Brands We Service in Castle Hills
We install materials from Owens Corning, Johns Manville, Knauf, and Rockwool - no proprietary lock-in, so we specify what performs best for your assembly and budget. Our Dallas-Fort Worth office coordinates local inventory, and most Castle Hills jobs start within a week of the written price being accepted. our brands
Pricing for Insulation in Castle Hills, TX
| Service | Typical range in Castle Hills |
|---|---|
| Crawl space vapor barrier | $1,200 - $3,500 |
| Full crawl space encapsulation | $5,000 - $12,000 |
| Attic radiant barrier | $1,500 - $3,500 |
| Radiant barrier with ventilation | $2,500 - $5,500 |
| Attic insulation removal | $1,500 - $4,000 |
| Contaminated insulation removal | $2,500 - $6,000 |
| Top plate and penetration sealing | $800 - $2,500 |
| Full attic air sealing | $2,000 - $5,000 |
| Drill & fill wall insulation | $2,000 - $5,500 |
| Injection foam walls | $3,500 - $8,000 |
| Attic cleanout and sanitizing | $1,200 - $3,500 |
| Comprehensive home energy audit | $500 - $900 |
Prices in Castle Hills push higher when we encounter vermiculite or asbestos requiring abatement, extensive rot repair in crawl spaces, or homes with multiple additions that each need separate permit applications. Every job still begins with a written price before any work starts - Haven Standard Clause 1 - and ends with a documented photo record.
Neighborhoods We Serve in Castle Hills
We work across all of Castle Hills, from the original 1950s sections near the city center to the infill areas added in the 1960s and 1970s. Most Castle Hills addresses are within 20 minutes of our dispatch point, and we schedule same-day or next-day assessments.
- Castle Hills Estates
- Castle Hills Forest
- Castle Hills Village
- Olmos Park Terrace adjacencies
- North Castle Hills ranches
Service Area - Cities Near Castle Hills
We serve Castle Hills directly and also work in Converse, TX, Universal City, TX, Live Oak, TX, and Windcrest, TX. Dispatch and scheduling are coordinated from our Dallas-Fort Worth office; crews are assigned locally to each market.
Serving Castle Hills, TX - Our Local Coverage Area
We’re based in the Castle Hills 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 Castle Hills
Yes - Castle Hills operates its own independent building department, and insulation permits must be pulled through Castle Hills City Hall, not San Antonio’s Development Services. We handle the permit application as part of our scope; the written price includes all fees.
Most Castle Hills jobs begin within 3-5 business days of written price acceptance, pending permit approval. Emergency situations like post-storm water damage in crawl spaces can be prioritized.
We provide the written scope, material specifications, and photo documentation that most Castle Hills HOAs require for architectural review. We do not start work until any required HOA approval is in hand.
Ready to see what your home is actually losing? Call (830) 420-0953 for a free estimate. We’ll walk the property, run a blower-door test if needed, and leave you with a written price and scope before we go. No voicemail loops - a live person answers 24/7.
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 Castle Hills 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."The winter gas bill dropped by about a third. They had estimated a quarter, so they under-promised."
- Genevieve R."They photographed rodent damage in the old insulation that we had no idea about, and priced the exclusion work separately so we could decide."
- Harriet N.