Insulation in Castle Hills, TX
Crawl space encapsulation and vapor barrier installation in Castle Hills, TX typically runs $3,800-$7,500 for a full encapsulation, with vapor barrier-only jobs starting around $1,800. Every home we treat here faces the same mid-century reality: slab foundations with perimeter crawl spaces that trap San Antonio’s humidity against floor joists, creating the exact conditions that destroy structural integrity and spike cooling bills. We’re Envelope Insulation Co., and we dispatch crews to Castle Hills from our Dallas-Fort Worth scheduling office. Call (830) 243-6352 for a written price before any work starts.
Why Castle Hills Homes Are Different
Castle Hills is a landlocked island of mid-century housing, fully built out between the 1950s and 1970s and surrounded on all sides by San Antonio. That means no new construction resets the baseline - every job works with aging ranch homes whose original 2-4 inches of blown or batt fiberglass has compacted to a fraction of its original R-value. Attics in these low-pitched roofs hit 140-155°F in summer, and Winter Storm Uri proved how thin the thermal envelope really is.
Because Castle Hills maintains its own independent city permitting office, we pull permits through Castle Hills directly, not San Antonio’s system. A pattern we see repeatedly: 1980s-1990s garage conversions and rear additions where the thermal boundary was never properly connected. The original attic may have been upgraded, but the addition’s cavity sits completely bare with no air sealing at the junction - a hidden energy drain behind otherwise well-kept interiors.
Our Main Castle Hills Services
Castle Hills homeowners call us most often for attic work and spray foam - here is how we approach each.
Attic Insulation in Castle Hills
We treat the attic as one system: air seal first, then insulate. In Castle Hills ranch homes, that means sealing top plates, can lights, and duct boots before adding any new material. We publish before-and-after blower-door numbers on every job so you can verify the performance change. Attic Insulation in Castle Hills covers our full process, material options from Owens Corning and Johns Manville, and what the documentation looks like when we leave.
Spray Foam Insulation in Castle Hills
Spray foam excels in Castle Hills additions and retrofit applications where fiberglass was never properly installed. We use open-cell and closed-cell formulations from Icynene and Demilec, applied after air sealing is complete. The Haven Standard requires a written scope and written warranty before anyone lifts a tool. Spray Foam Insulation in Castle Hills details where foam makes sense and where it does not.
Blown-In Insulation in Castle Hills
Blown-in cellulose from GreenFiber and fiberglass from Knauf are our standard retrofit materials for Castle Hills attics. We install only after blower-door-guided air sealing, with density and depth verified during the job. Every bag is counted and documented. Blown-In Insulation in Castle Hills explains our installation protocol and how we handle the hatch and access details.
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
Castle Hills’s 1950s-1970s slab-foundation ranch homes were built with perimeter crawl spaces that trap soil moisture against floor joists year-round. San Antonio’s humidity pushes wood moisture content well above the 20% threshold where mold colonizes and joist rot accelerates. Crawl Space Encapsulation & Vapor Barrier is the service we recommend when homeowners report musty odors, soft floors, or unexplained allergy symptoms that worsen in summer.
Crawl Space Encapsulation
Signs you need it
White or black fungal growth on joists, floors that feel spongy near exterior walls, or a persistent musty smell that air fresheners cannot mask.
What it costs in Castle Hills
Full encapsulation with sealed vapor barrier, dehumidifier, and insulated walls typically runs $4,200-$7,500 for Castle Hills ranch homes.
How we do it
We remove debris, treat organic growth, install a 12-20 mil reinforced polyethylene barrier sealed at all seams and walls, then add a conditioned-air dehumidifier sized to the cubic footage.
Crawl Space Vapor Barrier
Signs you need it
Standing water after rain, soil that stays dark and damp for days, or insulation falling from joists because it absorbed too much moisture.
What it costs in Castle Hills
Vapor barrier installation over bare soil starts at $1,800 and ranges to $3,400 depending on crawl space square footage and access difficulty.
How we do it
We grade the soil, lay overlapping sheets of reinforced polyethylene, seal all seams with pressure-sensitive tape, and extend the barrier 6-12 inches up foundation walls.
What Crawl Space Encapsulation & Vapor Barrier Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Vapor barrier (soil only) | $1,800 - $3,400 |
| Partial encapsulation (barrier + sealing) | $3,800 - $5,500 |
| Full encapsulation (barrier + dehumidifier + insulation) | $4,200 - $7,500 |
How long does crawl space encapsulation take in Castle Hills?
Most Castle Hills ranch homes take 2-3 days for full encapsulation, or one day for vapor barrier only. We coordinate with Castle Hills’s permitting office when required. Call (830) 243-6352 for a written price and timeline.
Will encapsulation fix my musty smell?
Yes, when the source is ground moisture evaporating into the crawl space. We verify the source with moisture meters before quoting, and we document readings before and after. If the odor persists, we return under our 365-Day Done Right Promise.
Radiant Barrier Installation in Castle Hills
Castle Hills attics reach 140-155°F in summer, and the original low-pitched ranch roofs offer minimal natural ventilation. Radiant barrier installation reflects infrared heat before it radiates into living spaces, reducing the cooling load that compacted 50-year-old fiberglass cannot handle. Radiant Barrier Installation is the most cost-effective upgrade for homes where the HVAC runs continuously from June through September.
Attic Radiant Barrier
Signs you need it
Second rooms that stay 8-12°F warmer than the thermostat setting, or ductwork in the attic that feels hot to the touch even when the AC is running.
What it costs in Castle Hills
Radiant barrier draped over attic rafters or laid over existing insulation typically costs $1,400-$2,800 for a Castle Hills ranch home.
How we do it
We install perforated aluminum foil laminate across rafter bays, maintaining ventilation channels, and we staple or suspend it to avoid compressing existing insulation.
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 currently in place.
What it costs in Castle Hills
Roof-deck application during re-roofing runs $1,800-$3,200 depending on roof complexity and whether we coordinate with your roofing contractor.
How we do it
We apply foil-faced sheathing or radiant barrier paint directly to the roof deck before shingles go on, creating a permanent thermal break at the hottest surface.
What Radiant Barrier Installation Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Attic radiant barrier (draped or laid) | $1,400 - $2,800 |
| Radiant barrier roof deck (during re-roof) | $1,800 - $3,200 |
| Radiant barrier with attic air sealing package | $2,600 - $4,400 |
Does radiant barrier work with old insulation?
Yes, it works independently - radiant barrier blocks heat transfer by radiation, while insulation slows conduction. In Castle Hills homes with degraded fiberglass, we often pair both for measurable results. Call (830) 243-6352 for blower-door numbers from comparable jobs.
How much will my cooling bill drop?
Most Castle Hills homeowners see 5-15% cooling savings, with the biggest gains in homes where ducts run through the attic. We measure attic temperature before and after, and we include those readings in your documented photo record.
Insulation Removal & Replacement in Castle Hills
Fifty-year-old fiberglass in Castle Hills attics has settled, fragmented, and often been compromised by roof leaks, rodent activity, or past DIY attempts. Removal and replacement is not a cleanup job - it is a controlled extraction of contaminated material followed by restoration of the thermal envelope to current Climate Zone 2 standards. Insulation Removal & Replacement is what we recommend when the existing material cannot be salvaged.
Contaminated Insulation Removal
Signs you need it
Visible rodent droppings, urine staining, or mold growth on insulation batts, or a smell that returns after surface cleaning.
What it costs in Castle Hills
Contaminated insulation removal with HEPA containment and disposal runs $2,400-$4,200 for a typical Castle Hills ranch attic.
How we do it
We establish negative air pressure, remove material in sealed bags, HEPA-vacuum all surfaces, and apply antimicrobial treatment before any new insulation goes in.
Insulation Replacement
Signs you need it
Original insulation compressed below joist tops, or R-value measured well below R-38 despite appearing to have sufficient depth.
What it costs in Castle Hills
Replacement with new blown-in fiberglass or cellulose after removal typically adds $2,200-$3,800 to the removal cost for a Castle Hills home.
How we do it
We air seal the attic floor first, then install new material to the depth required for R-38 or better, verifying with depth gauges and photographing every quadrant.
What Insulation Removal & Replacement Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Contaminated insulation removal | $2,400 - $4,200 |
| Standard insulation removal (non-contaminated) | $1,600 - $2,800 |
| Removal + replacement to R-38 | $3,800 - $7,200 |
Can we stay in the house during removal?
Yes, but we seal the attic access and run negative air machines to prevent cross-contamination. We schedule the noisiest work during hours you specify. Call (830) 243-6352 to discuss timing.
Do you test for asbestos first?
We visually inspect for vermiculite and suspect materials; if found, we recommend third-party lab testing before disturbing anything. We do not proceed without written clearance or a documented plan.
Attic Air Sealing in Castle Hills
The 1950s-1970s ranch homes in Castle Hills were built before modern air-sealing codes existed. Top plates, electrical penetrations, and recessed can lights leak conditioned air directly into vented attics, and the low-pitched roof geometry makes these leaks especially costly in summer. Attic Air Sealing is the prerequisite step we complete before adding any insulation - it is not optional under the Haven Standard.
Top Plate & Penetration Sealing
Signs you need it
Dust streaks around ceiling fixtures, or rooms that are hard to keep cool despite recent HVAC service and adequate attic insulation depth.
What it costs in Castle Hills
Top plate and penetration sealing for a Castle Hills ranch home typically runs $1,800-$3,200, with blower-door verification included.
How we do it
We use blower-door-directed infrared imaging to locate leaks, then seal top plates with fire-rated caulk and foam, and wrap penetrations with gasketed collars.
Can Light & Duct Boot Sealing
Signs you need it
Recessed lights that flicker in wind, or supply registers that blow noticeably cooler air in some rooms than others.
What it costs in Castle Hills
Can light sealing with IC-rated covers and duct boot sealing adds $800-$1,600 to a standard air-sealing package in Castle Hills.
How we do it
We install pre-formed airtight boxes over non-IC cans, seal duct boots with mastic and mesh, and pressure-test the duct system if leakage is suspected.
What Attic Air Sealing Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Basic attic air sealing (top plates, penetrations) | $1,800 - $3,200 |
| Air sealing with can light covers | $2,400 - $4,000 |
| Full air sealing + blower-door test (before/after) | $2,800 - $4,800 |
How much does air sealing really help?
Most Castle Hills homes we test show 25-40% reduction in CFM50 after proper attic air sealing. We give you the before-and-after blower-door numbers in writing. Call (830) 243-6352 to schedule a test.
Can you air seal without adding insulation?
Yes, and we often recommend it as a standalone first step. If your insulation depth is adequate but performance is poor, the leaks are the problem. We quote air sealing separately so you can phase the work.
Wall Insulation in Castle Hills
Castle Hills ranch homes were built with 2×4 exterior walls and either empty cavities or thin batts that have settled over decades. The 1980s-1990s additions we frequently encounter often have no wall insulation at all. Wall Insulation retrofits these cavities without tearing out drywall, restoring the thermal boundary that the original builders never completed.
Drill & Fill Wall Insulation
Signs you need it
Walls that feel hot to the touch in summer, or exterior walls where outlets and switches are cold in winter despite adequate attic insulation.
What it costs in Castle Hills
Drill-and-fill with dense-pack cellulose for a Castle Hills ranch home runs $2,800-$5,200 depending on wall square footage and exterior finish type.
How we do it
We drill 2-inch holes at stud-bay intervals, blow cellulose to 3.5 pounds per cubic foot density, plug with matching plugs, and texture-blend the repair.
Injection Foam Wall Insulation
Signs you need it
Empty wall cavities confirmed by thermal imaging, or rooms added in the 1980s-1990s that were never insulated and show sharp temperature swings.
What it costs in Castle Hills
Injection foam for a typical Castle Hills ranch runs $3,400-$6,000, with higher density and air-sealing value than loose-fill alternatives.
How we do it
We inject slow-rise foam through similar access holes, controlling expansion to avoid bowing, then trim and plug after full cure.
What Wall Insulation Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Drill & fill (cellulose, 2×4 walls) | $2,800 - $5,200 |
| Injection foam (2×4 walls) | $3,400 - $6,000 |
| Exterior wall insulation with air sealing | $4,200 - $7,500 |
Will drill-and-fill damage my siding?
We match plug locations to siding courses and use color-matched plugs for wood, vinyl, or brick. On painted brick, we coordinate with your painter or recommend one. The repair is documented in your photo record.
How do you know if my walls are empty?
We use thermal imaging during a blower-door test to identify cavities with no insulation signature. We show you the images before quoting, so you know what we know.
Attic Cleaning & Rodent Proofing in Castle Hills
Castle Hills’s mature oak canopy and established neighborhoods support active rodent populations that exploit aging soffits and roof vents. Contaminated attics are not just unpleasant - they are a respiratory hazard, and fiberglass damaged by nesting material loses all thermal value. Attic Cleaning & Rodent Proofing restores the space to a condition where new insulation can perform as designed.
Attic Sanitizing & Decontamination
Signs you need it
Visible rodent droppings, nesting material compressed into insulation, or a smell that enters living spaces through ceiling penetrations and recessed lights.
What it costs in Castle Hills
Attic sanitizing with HEPA extraction, antimicrobial treatment, and deodorization runs $1,800-$3,400 for a typical Castle Hills ranch attic.
How we do it
We remove contaminated material in sealed containers, HEPA-vacuum all surfaces, apply enzyme-based sanitizer, and run ozone or hydroxyl generators before any new work begins.
Rodent Proofing & Exclusion
Signs you need it
Scratching sounds in walls or ceiling, or evidence of re-entry after previous trapping or poisoning efforts failed to seal access points.
What it costs in Castle Hills
Rodent proofing with metal screening, hardware cloth, and sealant for a Castle Hills home typically costs $1,400-$2,800 depending on roof complexity and entry point count.
How we do it
We inspect roofline, soffits, vents, and foundation gaps, then seal with rodent-proof materials - no foam alone, no plastic - and we photograph every sealed entry.
What Attic Cleaning & Rodent Proofing Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Attic sanitizing & decontamination | $1,800 - $3,400 |
| Rodent proofing & exclusion | $1,400 - $2,800 |
| Sanitizing + proofing + insulation replacement | $4,200 - $8,000 |
Do you remove dead rodents?
Yes, we locate and remove carcasses as part of sanitizing, and we treat the area with enzyme neutralizer. If the location is inaccessible, we note it in your scope and warranty. Call (830) 243-6352 for a written price.
How do you keep them from coming back?
We seal every entry larger than 1/4 inch with metal - rodents chew through foam, plastic, and wood. Our 365-Day Done Right Promise covers re-entry through any point we sealed.
Home Energy Audit in Castle Hills
A home energy audit in Castle Hills reveals what 50 years of settling, additions, and deferred maintenance have done to the building envelope. We use the same diagnostic tools on audits that we use on our own jobs: blower-door pressurization, thermal imaging, and duct leakage testing. Home Energy Audit is where we recommend every Castle Hills homeowner start if they are unsure which service matters most.
Blower Door Test
Signs you need it
Rooms that never reach temperature, high utility bills with no obvious cause, or planning a major insulation investment and wanting baseline data first.
What it costs in Castle Hills
A standalone blower-door test with written report runs $350-$550 in Castle Hills; the fee is credited toward any work we perform within 90 days.
How we do it
We install a calibrated fan in an exterior door, depressurize to 50 Pascals, and measure CFM50 - the single number that quantifies total envelope leakage.
Thermal Imaging Inspection
Signs you need it
Visible temperature variations across walls or ceilings, or suspicion that insulation was omitted in additions or during past renovations.
What it costs in Castle Hills
Thermal imaging bundled with a blower-door test adds $200-$350, or $450-$700 as a standalone inspection with report.
How we do it
We scan interior and exterior surfaces during blower-door-induced pressure difference, marking thermal anomalies on photos and noting probable causes for each.
What Home Energy Audit Costs in Castle Hills
| Item | Typical range in Castle Hills |
|---|---|
| Blower-door test with written report | $350 - $550 |
| Blower-door + thermal imaging | $450 - $700 |
| Full audit (blower-door, thermal, duct test, insulation inspection) | $650 - $950 |
What does the audit report include?
You receive thermal images with annotations, blower-door CFM50 and ACH50 figures, duct leakage percentages, a prioritized scope with prices, and no obligation to proceed. Call (830) 243-6352 to schedule.
How long does the audit take?
Plan 2.5-4 hours for a full audit in a Castle Hills ranch home. We need access to attic, crawl space, and all rooms. You can follow the technician and ask questions in real time.
Brands We Service in Castle Hills
We source insulation and air-sealing materials from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - no proprietary lock-in, so we specify what performs for your specific condition. Our crews carry common batt and blown-in sizes locally, and we order specialty foam or rigid board with 48-hour turnaround. our brands page lists current specifications and warranty terms.
Pricing for Insulation in Castle Hills, TX
| Service | Typical range in Castle Hills |
|---|---|
| Vapor barrier (soil only) | $1,800 - $3,400 |
| Crawl space full encapsulation | $4,200 - $7,500 |
| Attic radiant barrier | $1,400 - $2,800 |
| Radiant barrier roof deck | $1,800 - $3,200 |
| Insulation removal (contaminated) | $2,400 - $4,200 |
| Removal + replacement to R-38 | $3,800 - $7,200 |
| Attic air sealing | $1,800 - $3,200 |
| Wall insulation (drill & fill) | $2,800 - $5,200 |
| Attic sanitizing | $1,800 - $3,400 |
| Rodent proofing | $1,400 - $2,800 |
| Home energy audit (full) | $650 - $950 |
Prices in Castle Hills run toward the higher end when access is limited, hazardous material is present, or the home has additions with disconnected thermal boundaries. Every quote is a flat written price with scope and warranty before work starts - Haven Standard Clause 1, no exceptions.
Neighborhoods We Serve in Castle Hills
We serve all of Castle Hills from our Dallas-Fort Worth dispatch office, with crews typically arriving within scheduled windows across these established areas. Response time is same-day or next-day for most service calls.
- Castle Hills Estates
- Castle Hills Forest
- Castle Hills Village
- Castle Hills Northwest
- Original Castle Hills (1950s core)
Service Area - Cities Near Castle Hills
We provide insulation and building-envelope services throughout the corridor surrounding Castle Hills, with direct dispatch to New Braunfels, TX, Cibolo, TX, Seguin, TX, and Schertz, TX. Scheduling and permitting coordination is handled from our Dallas-Fort Worth office; crews are deployed 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 maintains its own permitting office independent of San Antonio. We pull permits for encapsulation, spray foam, and any work involving structural modification. The permit cost and timeline are included in your written price.
We schedule energy audits within 48 hours and most installation work within 3-5 business days. Emergency situations - active leaks, severe mold, or HVAC failure related to insulation - get same-day response. A live person answers calls 24/7.
The most common cause we find is 1980s-1990s additions where the thermal boundary was never connected to the original house. One attic may be insulated while the other is bare, with no air sealing at the junction. A blower-door test locates the disconnect precisely.
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
"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."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.