Fast, Reliable Blown-In Insulation Across Alamo Heights
Blown-in insulation in Alamo Heights typically costs between $1.80 and $3.40 per square foot installed, with most attic jobs running $2,400-$5,800 and dense-pack wall retrofits in older homes ranging $3,200-$7,500. We’re usually on-site in Alamo Heights within 24-48 hours of your call, and we pull the required Alamo Heights city permit before any work starts - not a San Antonio permit, even if you’re a block from the boundary. Call (830) 243-6352 for a written price before anyone lifts a tool.
We’ve worked in Alamo Heights homes near Broadway, along the Ogden/Tuxedo streets, and throughout the Monte Vista-adjacent blocks enough times to know the pattern: 1920s-1950s custom builds, plaster-over-lath walls, attic access that requires a flexible crew, and a building department that answers its own phone. Our Blown-In Insulation team dispatches from our San Antonio office, but the crews serving Alamo Heights live locally and carry the specific Alamo Heights permit applications in their trucks.
Why Topside Attic Insulation New Braunfels Is Alamo Heights’s Preferred Blown-In Insulation Company
We’ve sealed and insulated over 9,000 homes since 2016, and a significant share of them sit inside Alamo Heights’s independent city limits. The reviews we receive from Alamo Heights customers consistently mention two things: that we showed them the blower-door numbers in writing, and that we didn’t push insulation until the air sealing was done. Our 365-Day Done Right Promise applies here exactly as it does everywhere else - if it’s not done right, we make it right, and you get that in writing before the crew starts.
Response time to Alamo Heights is typically same-day or next-day for estimates, and we answer calls with a live person 24/7. No voicemail loops. No callback windows measured in business days. When you schedule, you get a named technician and a text when they’re on the way - that’s Haven Standard: Arrive on schedule.
The local knowledge that matters here is permit navigation and historic-home sensitivity. Alamo Heights’s building department issues its own permits for insulation work, and many of these homes have knob-and-tube wiring, balloon framing, or zero existing wall insulation. We map electrical before we blow, and we know which walls can take dense-pack without disturbing plaster interiors.
Our Blown-In Insulation Services in Alamo Heights

Blown-In Cellulose
We use GreenFiber cellulose on many Alamo Heights jobs because it performs well in our climate and settles less than you’d expect when installed at proper density. A typical Alamo Heights attic top-up with cellulose runs $2,400-$4,200 for a 1,200-1,800 square foot footprint, including air sealing of top plates and can-light penetrations before the blower runs. The material is treated for fire resistance and pest deterrence, which matters in older attics where rodents have historically found access through pier-and-beam foundations.

Blown-In Fiberglass
We source Owens Corning and Johns Manville fiberglass for homeowners who prefer synthetic material or have moisture concerns in their attic space. Fiberglass doesn’t absorb water the way cellulose can, which can be relevant in Alamo Heights homes with aging roof decking or occasional tile leaks. Installed cost typically falls between $2,200 and $3,800 for standard attic coverage. We still seal first, then insulate - fiberglass blown over unsealed leaks is just expensive air filtration.

Dense-Pack Wall Insulation
This is the service we perform most often in Alamo Heights that we rarely perform in newer suburbs. Many of the older two-story brick homes along the Broadway corridor and throughout the Ogden/Tuxedo neighborhood have no wall insulation whatsoever - just brick veneer tied to wood sheathing over lath and plaster. Dense-pack blown-in through small exterior drill holes is often the only retrofit option that preserves the historic interior finishes Alamo Heights homeowners strongly resist disturbing.
We recently dense-packed the walls of a 1940s two-story brick home near the Ogden/Tuxedo neighborhood. The house had no wall insulation - just brick veneer over wood sheathing - so we drilled small exterior holes and blew in GreenFiber cellulose to preserve the original plaster interior. After the job, the homeowner reported that upstairs rooms stayed noticeably cooler during a 100°F afternoon, and we pulled the required Alamo Heights city permit before work began. Dense-pack wall jobs in Alamo Heights typically range $3,200-$7,500 depending on wall area, accessibility, and whether we need to navigate balloon framing or platform framing.

Blown-In Top-Up
Some Alamo Heights attics already have insulation, but it’s settled, compressed, or was never installed to adequate depth in the first place. We see this frequently in 1950s ranch-style homes near the city center where original batts were laid at R-19 or less. A blown-in top-up brings the assembly to current code minimums - R-38 to R-49 for our climate zone - without removing what’s there, assuming the existing material is dry and uncontaminated. Typical cost: $1,800-$3,400. We always inspect first. Blowing new material over wet or moldy old material traps moisture against the deck.

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.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Before
AfterTrusted Brands We Service in Alamo Heights
We stock and install materials from Owens Corning, Johns Manville, Knauf, and GreenFiber - no proprietary product lock-in, so we can match the right material to your specific assembly rather than selling whatever our warehouse happens to push. For Alamo Heights customers, this means we can source dense-pack cellulose for historic wall retrofits, high-loft fiberglass for vented attics, or specialized products for tight spaces without waiting on special orders. Our crews carry common densities and blowing ratios on the truck, which keeps turnaround short and lets us complete most jobs in a single day once the Alamo Heights permit is approved.
Common Blown-In Insulation Problems We See in Alamo Heights Homes

- Settled insulation in balloon-framed attics. Original attics in Alamo Heights’s 1920s-1950s homes often used balloon framing, which leaves continuous wall cavities open from foundation to attic. Blown-in insulation settles over time, leaving top plates and eaves uncovered and allowing 150-160°F attic heat to radiate directly into living spaces below. We find this in maybe half the older homes we inspect.
- Knob-and-tube wiring buried under new insulation. Dense-pack wall insulation installed without first mapping active knob-and-tube wiring in older attics and walls risks overheating conductors or creating code violations. Alamo Heights’s 1920s-1950s housing stock frequently contains this wiring, and the Alamo Heights building inspector will flag it if we don’t document our electrical survey.
- Compressed or moisture-trapped existing batts. Homeowners sometimes add blown-in over original degraded fiberglass batts in open attics, which reduces the effective R-value of both materials and can trap moisture against pier-and-beam crawlspace framing. We remove contaminated or compressed material before we blow new - it’s slower, but it’s the only way the numbers work.
- Unsealed attic floors before insulation. This is the most common problem we correct: a previous contractor blew insulation over an attic floor full of leaks at top plates, plumbing penetrations, and can lights. The insulation performs at a fraction of its rated value because conditioned air escapes straight through it. We seal first, then insulate. Always.
Pricing for Blown-In Insulation in Alamo Heights, TX
Here are the ranges we see on actual Alamo Heights jobs, based on 2024-2025 material and labor costs:
| Service | Typical Range | What Drives Cost |
|---|---|---|
| Attic blown-in cellulose or fiberglass (new installation) | $2,400 - $5,800 | Attic square footage, accessibility, air sealing extent |
| Attic blown-in top-up over existing material | $1,800 - $3,400 | Current depth, condition of existing insulation, square footage |
| Dense-pack wall insulation (historic retrofit) | $3,200 - $7,500 | Wall area, framing type, exterior finish, permit complexity |
| Air sealing only (before insulation) | $800 - $2,200 | Leak count, can light count, chimney chase access |
These are installed prices, inclusive of the Alamo Heights city permit we pull on your behalf. Every job starts with a written price - flat, itemized, no open-ended allowances. Bring us a competing written estimate and we’ll give you a Free Second Opinion, line by line. Call (830) 243-6352 to schedule. Estimates are free, and you’ll have the written price before anyone starts.
We Also Serve Cities Near Alamo Heights

Our crews work throughout the corridor, including Alamo Heights and nearby New Braunfels, Cibolo, Seguin, and Schertz. Dispatch and scheduling are coordinated from our San Antonio office, but the technicians serving your area live locally and carry the right permits for each independent jurisdiction.
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 - Blown-In Insulation in Alamo Heights

Yes - dense-pack blown-in insulation is specifically designed for this scenario, and it’s the method we use most often in Alamo Heights historic homes. We drill small exterior holes through the brick or siding, blow cellulose into the wall cavity at controlled density, then plug and match the exterior finish. The plaster interior stays completely untouched. Call (830) 243-6352 and we’ll show you photos from a similar job.
Yes - Alamo Heights is an independent municipality with its own building department, and insulation contractors must pull Alamo Heights city permits rather than San Antonio permits even on homes one block from the boundary. We handle this permit application as part of our standard process, and no work begins until it’s approved. The permit cost is included in your written price.
Absolutely, and this is exactly the situation we encounter weekly in Alamo Heights. 1940s homes in the Ogden/Tuxedo area and along Broadway frequently have no cavity insulation - just brick veneer over wood sheathing over lath and plaster. Dense-pack blown-in through exterior drill holes is often the only retrofit that preserves original interior finishes while delivering meaningful thermal performance. Typical cost for a two-story home in this category: $4,500-$7,500.
Only if the wiring is properly mapped and addressed first. Active knob-and-tube wiring cannot be buried in insulation without creating an overheating risk and code violation. Our crew photographs and documents all visible wiring before blowing, and if we find active knob-and-tube, we flag it in your written scope and recommend a licensed electrician for remediation before we proceed. Safety first, then performance. Call (830) 243-6352 and we’ll inspect at no charge.
Yes - proper attic and wall insulation is the single most effective defense against freeze damage in older homes. During the February 2021 freeze, we heard from Alamo Heights homeowners who had completed our air-sealing and insulation work that their indoor temperatures stayed habitable even during the multi-day outage, while neighbors with uninsulated or poorly insulated homes suffered burst pipes in exterior walls and unconditioned crawl spaces. Blown-in insulation won’t prevent a grid failure, but it extends the time your home stays safe and reduces the load on any backup heat source. Call (830) 243-6352 for a free estimate - we’ll show you the blower-door numbers that predict your actual performance.
Written by Wes Okafor, Owner at Topside Attic Insulation New Braunfels, serving Alamo Heights since 2016 under The Haven Standard.