Insulation in Leon Valley, TX
Crawl space encapsulation and vapor barrier installation in Leon Valley typically runs $2,800-$6,500 for a full encapsulation, with most slab-on-grade ranch homes here needing moisture control that older construction never addressed. We’re Envelope Insulation Co., and we’ve sealed and insulated over 9,000 homes since 2016 under The Haven Standard - every job starting with a written price and ending with a documented photo record. In Leon Valley, that means tackling the unique challenges of 1950s-1970s housing stock where original insulation predates modern energy codes by decades. Call (830) 529-7780 for a free estimate with upfront pricing.
Why Leon Valley Homes Are Different
Leon Valley is a fully built-out enclave city surrounded by San Antonio, and its housing stock is overwhelmingly concentrated in the 1950s-1970s construction era. Nearly every residential job we take here is a retrofit on aging ranch homes whose original insulation predates Texas energy codes by decades. Because Leon Valley operates its own permitting and code enforcement independently from San Antonio, homeowners upgrading thermal envelopes must pull through the city’s own system, and inspectors consistently flag these older homes for insulation that has settled, moisture-damaged, or never met even the standards of its day.
The local climate makes this aging infrastructure especially punishing. Leon Valley sits squarely in Bexar County’s extreme heat zone, with attics routinely reaching 150°F+ during June through September. Winter Storm Uri in February 2021 further exposed how little cold-side protection these slab-on-grade homes have, creating lasting demand for spray foam air-sealing and radiant barrier upgrades. Many 1960s-era homes along the Bandera Road residential corridors were originally insulated to a code minimum that was already low, and decades of hard water humidity cycling through poorly vented attics has compressed and moisture-stained that original fiberglass to near-zero R-value - something our technicians encounter on nearly every pre-1980 job in Leon Valley.
Our Main Leon Valley Services
While this page covers our full building-envelope service line, Leon Valley homeowners most often call us about attic work and spray foam. Here are the three services with dedicated Leon Valley pages:
Attic Insulation in Leon Valley
Most Leon Valley attics we enter still contain original fiberglass batts installed when the home was built, now compressed well below current Texas R-38 minimums. We remove degraded material, seal air leaks at top plates and penetrations, then install new insulation with documented before-and-after blower-door numbers. Every job follows Haven Standard Clause 1: flat price, written scope, written warranty before anyone lifts a tool. Attic Insulation in Leon Valley
Spray Foam Insulation in Leon Valley
Closed-cell spray foam is particularly effective in Leon Valley’s shallow attic cavities and unconditioned crawl spaces, where it both insulates and air-seals in one application. We source materials from Owens Corning, Johns Manville, and other major manufacturers - no proprietary lock-in - and publish blower-door results on every applicable job so you can verify the performance change. Spray Foam Insulation in Leon Valley
Blown-In Insulation in Leon Valley
Blown-in cellulose from GreenFiber or fiberglass from Knauf works well for topping off existing insulation in Leon Valley’s ranch-style homes, provided the attic floor is sealed first. We never blow insulation over an unsealed attic floor; air sealing of top plates, can lights, and penetrations is completed before any insulation is added. Blown-In Insulation in Leon Valley
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 Leon Valley
Leon Valley’s slab-on-grade ranch homes from the 1950s-1970s rarely have conditioned crawl spaces, and many homeowners don’t realize how much ground moisture is migrating through their foundation until they see condensation on ductwork or smell musty air at the registers. Full crawl space encapsulation with a vapor barrier stops this moisture at its source, protecting both indoor air quality and the structural integrity of floor joists that were never designed for sustained humidity exposure. We include this service as part of our complete Crawl Space Encapsulation & Vapor Barrier program.
Crawl Space Vapor Barrier
Signs you need it
Musty odors from floor registers, visible condensation on ductwork or pipes in the crawl space, or warping hardwood floors suggest ground moisture is migrating upward through an unsealed foundation.
What it costs in Leon Valley
A 6-mil to 20-mil vapor barrier installation for a typical Leon Valley ranch home runs $1,200-$2,800 depending on crawl space square footage and whether existing debris needs removal.
How we do it
We clear the crawl space, lay overlapping polyethylene sheeting sealed at seams and foundation walls, then tape all penetrations before delivering a documented photo record of the completed barrier.
Crawl Space Encapsulation
Signs you need it
Standing water after rain, mold on floor joists, or HVAC ducts sweating continuously indicate the crawl space is exchanging moisture with the soil and outside air without adequate control.
What it costs in Leon Valley
Full encapsulation with sealed vapor barrier, dehumidifier, and conditioned access for a standard Leon Valley ranch home typically ranges $2,800-$6,500 based on square footage and existing conditions.
How we do it
We install a complete sealed envelope - walls, floor, and piers - with a sump pump if needed, then add a permanent dehumidifier sized to the space, with before-and-after humidity readings in your documentation.
What Crawl Space Encapsulation & Vapor Barrier Costs in Leon Valley
| Item | Typical range in Leon Valley |
|---|---|
| Vapor barrier (6-20 mil, install only) | $1,200 - $2,800 |
| Full encapsulation with dehumidifier | $2,800 - $6,500 |
| Crawl space insulation (board or foam) | $1,500 - $3,200 |
How long does crawl space encapsulation take in Leon Valley?
Most Leon Valley ranch homes take 1-3 days depending on crawl space size, debris removal needs, and whether we’re adding insulation or just sealing. We deliver a written schedule with your upfront price and text you when the crew is on the way.
Does Leon Valley require permits for crawl space work?
Yes, Leon Valley operates its own permitting independently from San Antonio, and inspectors flag moisture control and insulation upgrades on older homes. We handle permit submission as part of our scope and include inspection scheduling in your written price.
Radiant Barrier Installation in Leon Valley
Leon Valley attics hitting 150°F+ for four months straight force air conditioners to run continuously in homes with inadequate roof deck protection. Radiant barrier installation reflects that infrared heat before it radiates into the attic space, dropping attic temperatures 20-35°F and giving aging HVAC systems in these 1960s-era homes a fighting chance. We install this as part of our complete Radiant Barrier Installation service, with documented performance metrics on every job.
Attic Radiant Barrier
Signs you need it
Your air conditioner runs non-stop from June through September, ceiling rooms are noticeably hotter than interior rooms, or your roof deck is too hot to touch from inside the attic.
What it costs in Leon Valley
Radiant barrier foil installation across attic rafters in a typical Leon Valley ranch home runs $1,100-$2,400 depending on attic square footage and accessibility.
How we do it
We staple perforated aluminum foil across rafter bays, maintaining proper ventilation gaps, then verify attic temperature reduction with infrared readings included in your photo documentation.
Radiant Barrier Roof Deck
Signs you need it
Shingle life is shortened by excessive heat buildup, or you’re re-roofing and want to address thermal performance at the deck level rather than adding interior foil later.
What it costs in Leon Valley
Radiant barrier decking or spray-applied radiant coating during re-roofing typically adds $1,800-$3,500 to the project for a standard Leon Valley home.
How we do it
We install OSB with factory-applied radiant barrier laminate or spray a low-emissivity coating directly to the roof deck sheathing, with written specifications for your roofing contractor’s coordination.
What Radiant Barrier Installation Costs in Leon Valley
| Item | Typical range in Leon Valley |
|---|---|
| Attic radiant barrier foil (rafter install) | $1,100 - $2,400 |
| Radiant barrier roof deck (re-roofing add-on) | $1,800 - $3,500 |
| Radiant barrier with attic air sealing package | $2,200 - $4,200 |
Does radiant barrier work with existing insulation?
Yes, radiant barrier complements existing insulation by addressing the heat that still radiates through the roof deck; in Leon Valley’s 150°F+ attics, the combination often drops cooling loads 10-15%.
How long does radiant barrier last?
Properly installed perforated foil maintains reflectivity for 20+ years; we use products from Owens Corning and Johns Manville with documented performance data, and your warranty is in writing before work starts.
Insulation Removal & Replacement in Leon Valley
The original fiberglass batts in Leon Valley’s 1950s-1970s ranch homes have often degraded to near-zero effective R-value after decades of humidity cycling through poorly vented attics. Removing this contaminated, compressed material is the necessary first step before any new insulation can perform as rated, and it’s a service we handle through our Insulation Removal & Replacement program with full containment and documented disposal.
Attic Insulation Removal
Signs you need it
Insulation is visibly compressed below joist tops, discolored from moisture or rodent activity, or you’re finding fiberglass particles in ceiling air registers.
What it costs in Leon Valley
Removal and bagged disposal of existing attic insulation in a typical Leon Valley ranch home runs $1,400-$2,800 depending on volume and accessibility.
How we do it
We set up negative air containment, remove material with industrial vacuums into sealed bags, then deliver a photo record of the clean deck before any new work begins.
Contaminated Insulation Removal
Signs you need it
Strong urine odor in the attic, visible rodent droppings throughout insulation, or mold growth on insulation surfaces indicates biological contamination requiring specialized removal.
What it costs in Leon Valley
Contaminated removal with HEPA containment, sanitizing, and deodorizing for a Leon Valley home typically ranges $2,200-$4,500 based on contamination extent and attic size.
How we do it
We deploy full PPE and HEPA-filtered negative air machines, remove contaminated material as hazardous waste, apply enzymatic sanitizer to affected structures, and document with before-and-after photos.
What Insulation Removal & Replacement Costs in Leon Valley
| Item | Typical range in Leon Valley |
|---|---|
| Standard attic insulation removal | $1,400 - $2,800 |
| Contaminated insulation removal | $2,200 - $4,500 |
| Removal + replacement with new insulation | $3,200 - $6,800 |
Can I just add new insulation over old?
We don’t recommend it in Leon Valley’s older homes - compressed, moisture-damaged fiberglass loses effective R-value and can harbor mold; removal lets us inspect and seal the deck first, which is Haven Standard practice.
What happens to the old insulation?
We bag and dispose through licensed waste haulers; for contaminated material, we follow Texas regulations for biological waste, and your documentation includes disposal receipts.
Attic Air Sealing in Leon Valley
Leon Valley’s pre-1980 homes were built before blower-door testing existed, and the resulting air leakage - at top plates, can lights, duct boots, and attic hatches - often exceeds modern code by 300% or more. We treat air sealing as a hard prerequisite, not an upsell, through our Attic Air Sealing service, completing all sealing before any insulation is added and publishing before-and-after blower-door numbers on every job.
Top Plate & Penetration Sealing
Signs you need it
Dust streaks around ceiling fixtures, noticeable temperature differences between rooms, or your blower-door test - a pressurization reading showing how much air your building envelope is losing - reads above 3,500 CFM50.
What it costs in Leon Valley
Sealing top plates, wire penetrations, and plumbing stacks in a typical Leon Valley ranch attic runs $800-$1,800 depending on linear footage and access difficulty.
How we do it
We use expanding foam and fire-rated caulk to seal all plate gaps and penetrations, then re-test with the blower door to verify reduction, with both readings in your written record.
Can Light & Duct Boot Sealing
Signs you need it
Can lights feel drafty, you see attic dust around fixture rims, or conditioned air is leaking into the attic through disconnected duct boots.
What it costs in Leon Valley
Sealing can lights with proper covers and mastic-sealing duct boots typically runs $600-$1,400 for a standard Leon Valley home with 8-15 fixtures.
How we do it
We install fire-rated airtight covers over can lights, seal duct boots with fiberglass-reinforced mastic, and verify with smoke pencil and blower-door testing before signing off.
What Attic Air Sealing Costs in Leon Valley
| Item | Typical range in Leon Valley |
|---|---|
| Top plate & penetration sealing | $800 - $1,800 |
| Can light & duct boot sealing | $600 - $1,400 |
| Complete attic air sealing package | $1,800 - $3,600 |
How much does air sealing save on energy bills?
Leon Valley homeowners typically see 15-25% cooling load reduction after proper attic air sealing, with before-and-after blower-door numbers proving the change - we don’t estimate savings, we document the envelope improvement.
Is air sealing required before adding insulation?
It’s required by our Haven Standard: we will never blow insulation over an unsealed attic floor because new insulation simply hides leaks without stopping them, wasting your investment and our reputation.
Wall Insulation in Leon Valley
The 2×4 exterior walls in Leon Valley’s 1950s-1970s ranch homes were originally insulated with R-11 fiberglass batts if they were insulated at all, and many Bandera Road corridor homes have empty wall cavities where settling or moisture removed what little existed. Retrofitting wall insulation without tearing off drywall is possible through injection methods, which we offer through our Wall Insulation service with minimal disruption to finished interiors.
Injection Foam Wall Insulation
Signs you need it
Exterior walls feel hot to the touch in summer, rooms with exterior walls are 5-10 degrees warmer than interior rooms, or an infrared camera shows empty cavities.
What it costs in Leon Valley
Injection foam for exterior walls in a typical Leon Valley ranch home runs $2,400-$4,800 depending on wall square footage and cavity condition.
How we do it
We drill 2-inch holes at stud bay intervals, inject slow-rise foam that fills without bowing walls, patch with matching texture, and provide a photo record of filled cavities.
Drill & Fill Wall Insulation
Signs you need it
You’re renovating and have wall access, or exterior walls have no insulation and you want dense-pack cellulose rather than foam for specific thermal or acoustic properties.
What it costs in Leon Valley
Dense-pack cellulose drill-and-fill for a standard Leon Valley home typically ranges $1,800-$3,600, with GreenFiber material sourced for homeowners preferring recycled content.
How we do it
We drill access holes, blow cellulose to 3.5 pounds per cubic foot density for no settling, then patch and texture-match; the written scope specifies density targets before work starts.
What Wall Insulation Costs in Leon Valley
| Item | Typical range in Leon Valley |
|---|---|
| Injection foam (exterior walls) | $2,400 - $4,800 |
| Dense-pack cellulose drill & fill | $1,800 - $3,600 |
| Interior wall soundproofing | $1,200 - $2,800 |
Will injection foam damage my walls?
We use slow-rise formulations specifically rated for existing wall cavities, and our written scope includes a wall-integrity guarantee - if we damage drywall, we repair it under our 365-Day Done Right Promise.
Can you insulate walls without removing drywall?
Yes, injection and dense-pack methods require only small access holes that we patch and texture-match; most Leon Valley homeowners can’t locate our repair points after painting.
Attic Cleaning & Rodent Proofing in Leon Valley
Leon Valley’s mature tree canopy and established neighborhoods create ideal rodent highway systems, and the shallow, hot attics in these 1960s-era homes become nesting sites once squirrels or roof rats find entry at fascia gaps or vent screens. We address this through Attic Cleaning & Rodent Proofing, removing contamination, sanitizing structures, and sealing entry points with materials rodents can’t chew through.
Attic Sanitizing & Decontamination
Signs you need it
Visible rodent droppings, urine stains on insulation or decking, or a persistent organic odor that air fresheners don’t reach indicate active or recent infestation requiring professional decontamination.
What it costs in Leon Valley
Attic sanitizing and decontamination for a typical Leon Valley ranch home runs $1,600-$3,200 depending on contamination extent and whether insulation removal is required first.
How we do it
We remove contaminated material, HEPA-vacuum all surfaces, apply enzymatic sanitizer that breaks down organic waste, then deliver a photo record and clearance inspection documentation.
Rodent Proofing & Exclusion
Signs you need it
Scratching noises in walls or ceiling, visible entry gaps at roofline corners, or recurring infestations after trapping suggest the building envelope has unsealed penetrations rodents are exploiting.
What it costs in Leon Valley
Comprehensive rodent proofing with metal flashing, hardware cloth, and sealant for a standard Leon Valley home typically ranges $900-$2,000 based on linear footage of vulnerable areas.
How we do it
We inspect with ladders and pole cameras, seal all entry points 1/4-inch or larger with rodent-proof materials, install vent guards, and provide a written exclusion map of every location addressed.
What Attic Cleaning & Rodent Proofing Costs in Leon Valley
| Item | Typical range in Leon Valley |
|---|---|
| Attic sanitizing & decontamination | $1,600 - $3,200 |
| Rodent proofing & exclusion | $900 - $2,000 |
| Full attic restoration (cleaning + proofing + insulation) | $3,500 - $7,500 |
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 chewed fascia or gaps at roofline corners; we offer free inspections with photo documentation of what we find.
Will rodents come back after proofing?
Our exclusion work carries a written warranty - if rodents re-enter through any location we sealed, we return at no charge under our 365-Day Done Right Promise; we also identify landscaping or tree-trimming needs that reduce access.
Home Energy Audit in Leon Valley
A home energy audit in Leon Valley reveals exactly where 1950s-1970s construction is hemorrhaging conditioned air and dollars, with blower-door testing and thermal imaging pinpointing leaks that visual inspection misses. We conduct these audits through our Home Energy Audit service, delivering a written priority list with performance numbers so homeowners can phase improvements intelligently rather than guessing.
Blower Door Test
Signs you need it
Your energy bills are 30% or more above similar-sized homes, rooms have persistent temperature imbalances, or you’re planning insulation work and want a baseline to verify improvement.
What it costs in Leon Valley
A standalone blower-door test with written report for a Leon Valley home runs $350-$550; it’s credited toward any remediation work we perform within 90 days.
How we do it
We install a calibrated fan in an exterior door, depressurize the house to 50 Pascals, measure CFM50 - the single number showing total envelope leakage - then identify leak locations with smoke pencils and infrared.
Thermal Imaging Inspection
Signs you need it
You suspect missing wall insulation, want to verify insulation installation quality, or need documentation of heat loss patterns for an insurance or warranty claim.
What it costs in Leon Valley
Thermal imaging as part of a full energy audit typically adds $200-$350 to the package, or $450-$750 as a standalone inspection with written thermal report.
How we do it
We scan with FLIR cameras during blower-door depressurization to make thermal patterns visible, mark anomalies on floor plans, and deliver images with temperature differential data in your written report.
What Home Energy Audit Costs in Leon Valley
| Item | Typical range in Leon Valley |
|---|---|
| Blower door test with written report | $350 - $550 |
| Full energy audit (blower door + thermal + duct test) | $650 - $950 |
| Thermal imaging inspection standalone | $450 - $750 |
What does a home energy audit include?
Our full audit includes blower-door test, thermal imaging, duct leakage testing, combustion safety check, and a written priority list with estimated savings for each improvement; you get the report before we propose any work.
Is an energy audit worth it before insulating?
Absolutely - in Leon Valley’s aging housing stock, an audit prevents spending on insulation in locations where air sealing would deliver more performance per dollar; we credit the audit cost toward any work we perform.
Brands We Service in Leon Valley
We stock and install materials from Owens Corning, Johns Manville, Knauf, and GreenFiber, with no proprietary product lock-in - we specify what performs for your specific building envelope condition. Most common insulation types are available for next-day installation in the Leon Valley area, with specialty spray foam products scheduled based on project scope. See our brands for complete specifications.
Pricing for Insulation in Leon Valley, TX
| Service | Typical range in Leon Valley |
|---|---|
| Crawl space vapor barrier | $1,200 - $2,800 |
| Full crawl space encapsulation | $2,800 - $6,500 |
| Attic radiant barrier foil | $1,100 - $2,400 |
| Radiant barrier roof deck (re-roofing) | $1,800 - $3,500 |
| Standard attic insulation removal | $1,400 - $2,800 |
| Contaminated insulation removal | $2,200 - $4,500 |
| Attic air sealing (complete package) | $1,800 - $3,600 |
| Injection foam wall insulation | $2,400 - $4,800 |
| Dense-pack cellulose walls | $1,800 - $3,600 |
| Attic sanitizing & decontamination | $1,600 - $3,200 |
| Rodent proofing & exclusion | $900 - $2,000 |
| Full home energy audit | $650 - $950 |
Prices in Leon Valley trend toward the higher end when attics have limited access hatches, when original construction used non-standard framing, or when independent permitting requires additional inspection coordination. Every job begins with a written price under Haven Standard Clause 1 - no work starts without it - and we offer a Free Second Opinion on any written estimate from another contractor.
Neighborhoods We Serve in Leon Valley
We serve the full Leon Valley city limits, with crews dispatched from our San Antonio coordination office and typically arriving within 45 minutes for scheduled appointments. Representative neighborhoods include:
- Bandera Road corridor (1960s ranch homes)
- Valley Hi area
- Leon Valley proper (original 1950s-60s subdivisions)
- Timber Ridge
- Nearby enclave streets off Evers Road
Service Area - Cities Near Leon Valley
Our crews serve the full Bexar County and northern Hill Country area, with regular work in Boerne, TX, Fair Oaks Ranch, TX, Scenic Oaks, TX, and Helotes, TX. Dispatch and scheduling are coordinated from our San Antonio office, with local crews assigned to minimize drive time and maintain our on-schedule arrival commitment.
Serving Leon Valley, TX - Our Local Coverage Area
We’re based in the Leon Valley 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 Leon Valley
Yes, Leon Valley operates its own permitting and code enforcement independently from San Antonio, and inspectors consistently flag insulation upgrades on pre-1980 homes. We pull permits as part of our written scope and schedule inspections so you don’t coordinate with the city yourself.
Most Leon Valley homeowners get an initial inspection within 2-3 business days, with work scheduled within a week of written price acceptance; emergency situations like failed HVAC due to attic heat gain get same-day response when possible.
Leon Valley’s 1950s-1970s ranch homes have shallow attic cavities, 2×4 walls, and original insulation that predates modern codes - retrofit work requires careful air sealing first, then insulation selected for constrained spaces, with blower-door verification that new construction doesn’t need.
Ready to see what your home’s building envelope is actually doing? Call (830) 529-7780 for a free estimate with upfront pricing. Every job starts with a written scope and written warranty under The Haven Standard, and you’ll receive a documented photo record when our crew leaves. For attic, spray foam, or blown-in work, see our dedicated Leon Valley service pages linked above.
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 Leon Valley Customers Say
"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."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.