Insulation in Alamo Heights, TX
Crawl space encapsulation and vapor barrier installation in Alamo Heights typically runs $3,500-$8,500 for pier-and-beam homes, with most jobs completed in two days. The 1920s-1950s housing stock here - brick Tudors, Spanish Colonials, and early ranches on pier-and-beam foundations - creates unique moisture dynamics that slab-built neighborhoods don’t face. We’re Envelope Insulation Co., and we treat air sealing as a hard prerequisite before any insulation goes in, with written prices before work starts and documented photo records when we leave. Call (830) 402-5240 for a free estimate.
Why Alamo Heights Homes Are Different
Alamo Heights is a dense enclave of 1920s-1950s custom homes built before insulation codes existed. Brick Tudor Revivals, Spanish Colonial cottages, and early ranch-styles sit on pier-and-beam foundations with solid masonry walls or narrow cavities containing crumbled original batting or nothing at all. Every insulation retrofit here is effectively historic-home surgery: standard batt replacement doesn’t apply, and contractors must master injection foam and dense-pack blown-in techniques to reach cavities without destroying plaster-on-lath interiors.
San Antonio’s climate delivers 90-100+ days above 90°F annually, with unconditioned attic temperatures exceeding 150°F in summer. The February 2021 Winter Storm Uri exposed how these heat-tolerant homes had almost no thermal buffer, accelerating demand for comprehensive air-sealing and insulation overhauls. Contractors working near Broadway and Loop 410 learn quickly that drilling through plaster-and-lath requires injection foam nozzles at lower pressure than standard blown-cellulose jobs - or they face angry calls about ruined original walls.
Our Main Alamo Heights Services
These are the three services Alamo Heights homeowners call about most often.
Attic Insulation in Alamo Heights
Most Alamo Heights attics contain original or haphazardly layered insulation from the 1940s-70s that has settled, been contaminated by roof leaks, or been tunneled through by HVAC upgrades. We remove the compromised material, seal all top plates and penetrations, then install new insulation with documented before-and-after blower-door numbers. Attic Insulation in Alamo Heights is where we start most envelope overhauls in this neighborhood.
Spray Foam Insulation in Alamo Heights
Spray foam gives us the air-sealing and insulation value in one pass, which matters in Alamo Heights homes where plaster walls make retrofit access difficult. We use open-cell and closed-cell products from Icynene and Demilec, applied after blower-door testing establishes the baseline. Spray Foam Insulation in Alamo Heights works particularly well for attic conversions and sealed crawl spaces.
Blown-In Insulation in Alamo Heights
Blown-in cellulose and fiberglass from Owens Corning and GreenFiber let us add R-value without removing interior finishes, critical for preserving original plaster in these historic homes. We dense-pack wall cavities and top off attic floors after air sealing is complete. Blown-In Insulation in Alamo Heights is our most common retrofit method for the neighborhood’s narrow wall cavities.
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.
Crawl Space Encapsulation & Vapor Barrier in Alamo Heights
The pier-and-beam foundation common to Alamo Heights homes creates a ventilated crawl space beneath the floor that traps San Antonio’s humidity against joists and subflooring, promoting mold, wood rot, and musty indoor air. Crawl Space Encapsulation & Vapor Barrier seals that space from the soil and exterior, controls moisture with dehumidification, and protects the structural floor system that these historic homes depend on. We never install floor insulation over an unsealed crawl space - the moisture would destroy it.
Crawl Space Vapor Barrier
Signs you need it
Your crawl space has standing water after rain, white or black mold on joists, or floors that feel cold and damp even when the heat runs.
What it costs in Alamo Heights
Most vapor barrier installations in Alamo Heights run $1,500-$3,500 for a typical 1,200-2,000 square foot crawl space under these older homes.
How we do it
We lay a 6-mil or thicker polyethylene barrier across the entire dirt floor, seal seams with waterproof tape, extend it up foundation walls, and mechanically fasten at the top before addressing drainage.
Crawl Space Encapsulation
Signs you need it
You’re running a portable dehumidifier constantly, finding insulation falling from between joists, or smelling musty air coming from floor registers.
What it costs in Alamo Heights
Full encapsulation in Alamo Heights typically ranges from $4,000-$8,500 depending on crawl space height, accessibility, and whether we need to add a permanent dehumidifier.
How we do it
We seal foundation vents, install a reinforced vapor barrier on walls and floor, apply closed-cell spray foam to rim joists, and install a dedicated dehumidifier with a condensate pump.
What Crawl Space Encapsulation & Vapor Barrier Costs in Alamo Heights
| Item | Typical range in Alamo Heights |
|---|---|
| Vapor barrier (floor only) | $1,500 - $3,500 |
| Partial encapsulation (walls + floor) | $3,500 - $6,000 |
| Full encapsulation with dehumidifier | $4,000 - $8,500 |
How long does crawl space encapsulation take in Alamo Heights?
Most jobs finish in 1-3 days. Pier-and-beam homes with limited crawl space clearance may need an extra day for proper prep and sealing.
Will encapsulation make my floors warmer?
Yes. Sealing the crawl space stops the cold air wash beneath your floors, and many Alamo Heights homeowners report warmer floors within the first heating cycle after we finish.
Radiant Barrier Installation in Alamo Heights
With attic temperatures routinely exceeding 150°F through Alamo Heights summers, radiant heat gain through the roof deck is the dominant energy burden in these older homes that were built with little or no attic insulation. Radiant Barrier Installation reflects that infrared heat back toward the roof deck rather than letting it radiate into the attic space and down through the ceiling, reducing the load on air conditioning systems that are often already strained by ductwork running through 140°F attics.
Attic Radiant Barrier
Signs you need it
Your AC runs continuously on summer afternoons, ceiling surfaces feel warm to the touch, or your ductwork in the attic is too hot to hold comfortably.
What it costs in Alamo Heights
Attic radiant barrier installation in Alamo Heights typically runs $1,200-$2,800 for a standard 1,500-2,500 square foot home.
How we do it
We staple perforated radiant barrier foil across attic truss bottoms or drape it over existing insulation, maintaining ventilation paths and avoiding compression that would reduce its reflective performance.
Radiant Barrier Roof Deck
Signs you need it
You’re considering roof replacement and want the most effective radiant heat rejection, or your attic has limited headroom that makes truss-bottom installation impractical.
What it costs in Alamo Heights
Radiant barrier applied directly to the roof deck during re-roofing or retrofit runs $2,000-$4,500 in Alamo Heights depending on roof complexity and access.
How we do it
We apply radiant barrier sheathing or foil directly to the underside of the roof deck, sealed at seams, which blocks radiant heat before it enters the attic volume at all.
What Radiant Barrier Installation Costs in Alamo Heights
| Item | Typical range in Alamo Heights |
|---|---|
| Attic radiant barrier (foil over trusses) | $1,200 - $2,800 |
| Radiant barrier roof deck application | $2,000 - $4,500 |
| Radiant barrier with attic air sealing | $2,500 - $5,500 |
Does radiant barrier work with existing insulation?
Yes. We install it over existing insulation or combine it with new insulation after air sealing, and the blower-door test shows the combined effect on your home’s heat gain.
How much will my cooling bill drop?
Most Alamo Heights homeowners see 10-25% reduction in summer cooling costs, with the biggest drops in homes that had little or no attic insulation to start with.
Insulation Removal & Replacement in Alamo Heights
The layered, contaminated attic insulation common in Alamo Heights homes - original 1940s batts, 1970s additions, and rodent-compromised top-ups - creates health hazards and thermal bridges that new insulation alone cannot fix. Insulation Removal & Replacement starts with complete extraction, then air sealing, then fresh material installed to a documented depth and density with photo records at every stage.
Contaminated Insulation Removal
Signs you need it
You smell urine or decay in the attic, see rodent droppings mixed with insulation, or have had roof leaks that saturated the material.
What it costs in Alamo Heights
Contaminated insulation removal in Alamo Heights runs $2,000-$4,500 depending on attic square footage, contamination level, and whether hazmat protocols apply.
How we do it
We use commercial HEPA vacuums and negative air machines to remove all material without cross-contaminating living spaces, then treat exposed surfaces before any new insulation goes in.
Insulation Replacement
Signs you need it
Your attic insulation is compressed below the joist tops, has visible water staining, or was disturbed by prior HVAC or electrical work that left gaps and voids.
What it costs in Alamo Heights
Insulation replacement after removal in Alamo Heights typically runs $3,500-$7,500 including new air sealing and blown-in cellulose or fiberglass to current IECC levels.
How we do it
We seal all top plates, can lights, and duct boots, then blow new insulation to a uniform depth with density markers, documenting R-value achieved and coverage with photos.
What Insulation Removal & Replacement Costs in Alamo Heights
| Item | Typical range in Alamo Heights |
|---|---|
| Contaminated insulation removal only | $2,000 - $4,500 |
| Standard removal + replacement | $3,500 - $7,500 |
| Removal with full air sealing package | $5,000 - $9,500 |
Do I have to leave during removal?
No, but we seal the attic access and run negative air machines during removal. Most Alamo Heights homeowners stay in the home without issue.
How do I know if my old insulation is hazardous?
We test suspect material on site; vermiculite insulation may contain asbestos and requires lab confirmation before disturbance. Call (830) 402-5240 and we’ll inspect before quoting.
Attic Air Sealing in Alamo Heights
The plaster-on-lath construction and balloon framing common in Alamo Heights homes create continuous air channels from basement to attic that modern drywall construction doesn’t have, making stack effect - the natural rise of warm air through the house - particularly severe. Attic Air Sealing is the hard prerequisite we complete before any insulation goes in, because blowing new material over an unsealed attic floor simply hides the leaks without stopping the conditioned air you’re paying to heat and cool from escaping.
Top Plate & Penetration Sealing
Signs you need it
You’re finding dust streaks around ceiling fixtures, feeling drafts from outlets on exterior walls, or seeing your blower-door number come back above 3,500 CFM50.
What it costs in Alamo Heights
Top plate and penetration sealing in Alamo Heights typically runs $1,500-$3,500 for a 1,500-2,500 square foot home with the complex framing common here.
How we do it
We access the attic floor, seal all top plate joints with polyurethane foam, caulk wire and pipe penetrations, and install fire-rated collars where required by code.
Can Light & Duct Boot Sealing
Signs you need it
Your can lights flicker in windy weather, rooms farthest from the air handler never reach temperature, or you see insulation debris blown around the attic near duct connections.
What it costs in Alamo Heights
Can light and duct boot sealing in Alamo Heights runs $800-$2,000 depending on the number of fixtures and whether we need to install fire-rated covers.
How we do it
We install pre-formed fire-rated enclosures over non-IC can lights, seal all duct boots to drywall with mastic, and tape flex duct connections that have separated.
What Attic Air Sealing Costs in Alamo Heights
| Item | Typical range in Alamo Heights |
|---|---|
| Top plate & penetration sealing | $1,500 - $3,500 |
| Can light & duct boot sealing | $800 - $2,000 |
| Full attic air sealing package | $2,500 - $5,000 |
Will air sealing alone lower my bills?
Yes. Most Alamo Heights homes we test lose 30-50% of conditioned air through attic leaks, and sealing alone typically drops the blower-door number by 20-40% before any insulation is added.
Do you test after sealing?
Always. We run a blower-door test before and after, and you get both numbers in writing with the photo record. Under Haven Standard: documented evidence, not claims.
Wall Insulation in Alamo Heights
The solid masonry walls and narrow plaster-on-lath cavities in Alamo Heights homes present a retrofit challenge that standard batt installation cannot solve without destroying interior finishes that owners have paid to preserve. Wall Insulation here requires injection foam or dense-pack blown-in techniques at controlled pressure, with strategic access points that minimize plaster disruption and maintain the historic character that makes these homes valuable.
Injection Foam Wall Insulation
Signs you need it
Your exterior walls feel hot or cold to the touch, you have no wall insulation based on thermal imaging, or previous contractors refused to work with your plaster interiors.
What it costs in Alamo Heights
Injection foam wall insulation in Alamo Heights typically runs $3,500-$7,000 for a 1,500-2,500 square foot home, with plaster repair included in the scope.
How we do it
We drill 5/8-inch holes at stud bay intervals, inject slow-rise foam at low pressure to avoid bowing lath, then patch and match plaster texture.
Drill & Fill Wall Insulation
Signs you need it
You have empty stud cavities confirmed by borescope inspection, or prior insulation has settled to the bottom third of the wall leaving the upper stories unprotected.
What it costs in Alamo Heights
Drill and fill with dense-pack cellulose in Alamo Heights runs $2,500-$5,500 depending on wall height, cavity depth, and the number of interior walls being treated.
How we do it
We drill access holes at top and bottom of each stud bay, blow cellulose to 3.5 pounds per cubic foot density to prevent settling, then patch all penetrations.
What Wall Insulation Costs in Alamo Heights
| Item | Typical range in Alamo Heights |
|---|---|
| Injection foam (exterior walls) | $3,500 - $7,000 |
| Drill & fill dense-pack cellulose | $2,500 - $5,500 |
| Interior wall soundproofing | $1,800 - $4,000 |
Will injection foam damage my plaster?
Not when done correctly. We use pressure regulators and slow-rise formulas specifically to protect plaster-on-lath, and we warranty the plaster repair for one year.
Can you insulate brick walls from the inside?
Yes. We treat the interior stud cavity, not the brick itself, which is how these Alamo Heights homes were originally built - the air gap behind the plaster is where the insulation belongs.
Attic Cleaning & Rodent Proofing in Alamo Heights
The mature oak canopy and established neighborhoods of Alamo Heights support robust rodent populations that find easy access to pier-and-beam crawl spaces and aging soffits, with attics providing nesting material from decades of accumulated insulation. Attic Cleaning & Rodent Proofing removes the contaminated material, sanitizes the space, and seals every entry point with metal - not foam, which rodents chew through in weeks - before any new insulation is considered.
Attic Sanitizing & Decontamination
Signs you need it
You smell ammonia or decay from the attic, see urine stains on drywall ceilings, or have found dead rodents in the insulation during prior work.
What it costs in Alamo Heights
Attic sanitizing and decontamination in Alamo Heights runs $1,500-$3,500 depending on contamination extent and whether we need to treat for hantavirus or other pathogens.
How we do it
We remove all contaminated material, apply enzymatic cleaner to break down organic matter, fog with hospital-grade disinfectant, and let the space dry completely before reinsulating.
Rodent Proofing & Exclusion
Signs you need it
You’re hearing scratching at night, finding droppings in the attic, or have had multiple pest control treatments that never addressed how they’re getting in.
What it costs in Alamo Heights
Rodent proofing and exclusion in Alamo Heights typically runs $1,200-$2,800 for a standard home, with one-year warranty on re-entry.
How we do it
We inspect every roof penetration, soffit joint, and foundation gap, then seal with galvanized steel mesh, concrete, or metal flashing - materials rodents cannot chew through.
What Attic Cleaning & Rodent Proofing Costs in Alamo Heights
| Item | Typical range in Alamo Heights |
|---|---|
| Attic sanitizing & decontamination | $1,500 - $3,500 |
| Rodent proofing & exclusion | $1,200 - $2,800 |
| Full attic restoration (cleanout + proofing + reinsulation) | $4,500 - $9,500 |
How do I know if rodents are in my attic now?
Listen for scratching at dawn and dusk, check for droppings near the attic hatch, and look for compressed insulation trails. We inspect for free if you suspect activity.
Will proofing keep them out permanently?
Our metal exclusion work carries a one-year warranty, and we photograph every sealed entry point for your record. Foam or wood repairs fail; metal doesn’t.
Home Energy Audit in Alamo Heights
A home energy audit in Alamo Heights reveals the specific thermal and air-leakage failures that these pre-1960 homes hide behind their solid construction, giving homeowners a ranked priority list rather than a generic sales pitch for more insulation. Home Energy Audit is where every envelope project we take on begins - with a blower-door test, thermal imaging, and a written scope with flat pricing before any work is proposed.
Blower Door Test
Signs you need it
Your energy bills are rising without rate increases, rooms have uneven temperatures, or you’re considering insulation and want to know if air sealing should come first.
What it costs in Alamo Heights
A standalone blower-door test in Alamo Heights runs $350-$600, and we apply this fee toward any work we perform within 90 days.
How we do it
We mount a calibrated fan in an exterior door, depressurize the house to 50 Pascals, and measure CFM50 - the cubic feet per minute of air leakage at standard pressure.
Thermal Imaging Inspection
Signs you need it
You suspect missing wall insulation, have had ice dams or moisture issues, or want visual proof of where your home is losing heat before committing to work.
What it costs in Alamo Heights
Thermal imaging as part of a full audit in Alamo Heights runs $450-$750, including the blower-door test and written report with prioritized recommendations.
How we do it
We scan all exterior walls, ceilings, and foundation areas with a FLIR camera during blower-door depressurization, which makes air leaks visible as temperature differentials.
What Home Energy Audit Costs in Alamo Heights
| Item | Typical range in Alamo Heights |
|---|---|
| Blower-door test only | $350 - $600 |
| Full audit with thermal imaging | $450 - $750 |
| Audit with duct leakage testing | $650 - $950 |
What does the audit report include?
You get blower-door numbers, thermal images with annotations, a ranked list of air leaks and insulation gaps, and a written scope with flat pricing for each priority level.
Do I have to hire you for the recommended work?
No. The report is yours, and we offer a free second opinion on any competing quote. Under Haven Standard: the information belongs to the homeowner, not the salesperson.
Brands We Service in Alamo Heights
We install Owens Corning fiberglass and mineral wool, GreenFiber cellulose, and spray foam systems from Icynene and Demilec - no proprietary lock-in, so you get the right material for your specific envelope problem. Our San Antonio office stocks common densities and R-values for Alamo Heights jobs, with most materials on site within 48 hours of contract. See our brands for full specifications.
Pricing for Insulation in Alamo Heights, TX
| Service | Typical range in Alamo Heights |
|---|---|
| Crawl space vapor barrier | $1,500 - $3,500 |
| Full crawl space encapsulation | $4,000 - $8,500 |
| Attic radiant barrier | $1,200 - $2,800 |
| Radiant barrier roof deck | $2,000 - $4,500 |
| Contaminated insulation removal | $2,000 - $4,500 |
| Insulation removal + replacement | $3,500 - $7,500 |
| Attic air sealing (full package) | $2,500 - $5,000 |
| Injection foam wall insulation | $3,500 - $7,000 |
| Drill & fill wall insulation | $2,500 - $5,500 |
| Attic sanitizing & decontamination | $1,500 - $3,500 |
| Rodent proofing & exclusion | $1,200 - $2,800 |
| Full home energy audit | $450 - $750 |
Prices in Alamo Heights push higher when plaster-on-lath walls require careful drilling, crawl spaces have less than 18 inches of clearance, or hazardous material requires special handling. Every job still begins with a written price before any work starts - Haven Standard Clause 1 - and we never add charges after the scope is signed.
Neighborhoods We Serve in Alamo Heights
Our crews work throughout the Alamo Heights city limits and adjacent blocks, with dispatch from our San Antonio office. Most appointments are available within 2-3 business days, with emergency response for active leaks or HVAC failure related to insulation compromise.
- Olmos Park Terrace
- Terrell Hills border blocks
- Broadway corridor (near Loop 410)
- Alamo Heights historic district core
- Monte Vista adjacent streets
Service Area - Cities Near Alamo Heights
We serve Alamo Heights directly and coordinate with homeowners in surrounding communities who want the same documented envelope approach. If you’re near Schertz, TX, Cibolo, TX, Universal City, TX, or Selma, TX, we can schedule your audit or project with the same flat-price guarantee and photo documentation.
Serving Alamo Heights, TX - Our Local Coverage Area
We’re based in the Alamo Heights 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 Alamo Heights
We typically schedule audits within 2-3 business days and most project starts within one week of contract. Emergency calls for active water intrusion or HVAC-related insulation failure get same-day triage from our live answering service, 24/7.
Most attic and crawl space insulation does not require a permit in Alamo Heights, but spray foam and any electrical work near insulation do. We pull permits when required and include the cost in your written price - no surprises.
Yes. We provide the written scope, material specifications, and photo documentation that Alamo Heights HOAs typically require for exterior work, and we schedule around any architectural review timelines.
Call (830) 402-5240 for a free estimate. We’ll schedule your blower-door test, show you exactly where your home is losing conditioned air, and give you a written price before any work starts.
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 the hour.
- 4You approve before work beginsNothing starts until you say go.
What Alamo Heights 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."Fixed price, clean work, and they hauled the old material away as agreed."
- Todd M."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.