Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable Duct Sealing Across Schertz
Duct sealing in Schertz typically runs $400 – $1,200 for most homes, with apartment and condo shared systems landing in the middle of that range. We’re the local Duct Sealing crew that handles both single-family attics and the stacked mechanical closets found in Schertz’s denser developments. Dispatch and scheduling are coordinated from our San Antonio office, but our technicians live and work in the Schertz area, so we know the difference between a Wortham Oaks tract home and a condo off FM 3009. Call (361) 326-5060 for a free written estimate.
Why Hollis Air Duct Cleaning Is Schertz’s Preferred Duct Sealing Company
We’ve been sealing ducts in Schertz since the first big subdivision waves hit in the early 2000s. That matters because the flex-duct systems installed during that building boom are hitting their failure window now, and we’ve already worked through enough of them to know where the problems hide.
Our technicians are background-checked and uniformed, and they arrive inside the quoted window. The price is written down before any work starts. Every repair carries our 365-Day Done Right Promise: if the seal fails or the airflow problem returns within a year, we come back at no charge, including a free second visit. No negotiating, no runaround.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. That’s The Garrison Standard, and it’s how every Hollis location operates, including Duct Sealing in Schertz.
Duct Insulation in Schertz
Duct Insulation in Schertz is often the missing half of a sealing job. In our market, attics hit 140°F+ for months at a stretch, and uninsulated or degraded flex duct acts like a radiator in reverse, bleeding cooled air into the blown-in insulation before it ever reaches your registers. We see this constantly in the slab-on-grade homes along Schertz Parkway and throughout Wortham Oaks, where builder-grade insulation sleeves have compressed, torn, or simply fallen away from the duct core.
Our crew pulls back the attic insulation, assesses every run, and replaces degraded insulation with fresh, properly secured sleeves rated for our attic temperatures. In Schertz’s climate, this isn’t optional. Insulation and sealing go together. One without the other leaves money on the table every month.
When Insulation Fails in Our Heat
The blown-in fiberglass common in Schertz tract homes doesn’t just cover ducts, it buries them. That makes inspection hard and hides sweat-soaked insulation that has turned into a mold risk. We document what we find with photos, replace what needs replacing, and leave the attic layout cleaner than we found it.
Cost Range for Insulation Work
Adding or replacing duct insulation in a typical Schertz home runs $300 – $800 on top of sealing, depending on attic accessibility and linear footage. We quote it as a line item before we start, so you know the full number, not a teaser that grows at the door.
HVAC Duct Sealing in Schertz
HVAC Duct Sealing in Schertz means closing the gaps that let your conditioned air escape into the attic, wall cavities, or mechanical chases. In our market, the most common leaks are at flex-duct connections to metal plenums, where the builder’s tape has dried and peeled in years of 140°F attic heat. We also find crushed or disconnected runs hidden under blown-in insulation, especially in the slab-on-grade homes that dominate Schertz’s newer subdivisions.
Our process is straightforward. We pressurize the system, measure leakage with a duct blaster or calibrated fan, then seal every accessible joint with mastic and UL 181 tape. Mastic is a thick, brush-on sealant that remains flexible and bonds to both metal and flex duct. It outlasts tape alone, which is why we use it on every job.
Shared Systems in Multi-Family Buildings
Schertz is unusual along the I-35 corridor for how many apartment and condo complexes cluster along FM 3009 and Schertz Parkway with shared vertical dryer-vent stacks and common attic chases. Sealing these means working inside stacked mechanical closets, not crawling through a single-family attic. We coordinate with property managers, work within HOA scheduling rules, and document every unit’s airflow before and after.
Single-Family Attic Work
For detached homes, we pull back the blown-in insulation, trace every run by hand, and seal what we can reach. Some buried runs require partial insulation removal. We always ask permission first, quote it in writing, and replace what we disturb.
Trusted Brands We Service in Schertz
We stock parts and sealing materials from Honeywell, Aprilaire, and Abatement Technologies for Schertz jobs. Honeywell and Aprilaire filtration products integrate with the sealed systems we leave behind, so you’re not just stopping leaks, you’re upgrading what passes through the ductwork. Abatement Technologies supplies the containment and negative-air accessories we use on larger multi-family jobs. We don’t run to a supplier mid-job. Our vans carry what Schertz homes need, which keeps turnaround tight and scheduling reliable.
Common Duct Sealing Problems We See in Schertz Homes
- Builder-grade flex duct sagging in extreme attic heat. The flexible round duct installed in Schertz’s 1990s-2020s subdivisions softens and sags when attics hit 140°F+, pulling connections apart and creating leaks that your thermostat tries to compensate for by running longer cycles.
- Taped joints dried out and peeled in tract-home attics. The tape used on original installs was never rated for decades of South Texas attic exposure. We find it hanging loose or blown into the insulation, leaving gaps that dump cooled air directly into the attic.
- Shared dryer-vent stacks in apartment and condo buildings accumulating lint at offsets and elbows. These vertical runs serve multiple units and create backdrafting and fire risks that a single-unit cleaning never addresses. Sealing the accessible joints and restoring proper venting requires building access and coordination we regularly handle in Schertz complexes.
- Flex runs crushed or disconnected under blown-in insulation in slab-on-grade homes. In Wortham Oaks and along Schertz Parkway, installers often laid duct across joists and buried it in insulation. Over time, foot traffic during service work or simple gravity compresses the flex, choking airflow. A register-only cleaning misses this entirely.
Pricing for Duct Sealing in Schertz, TX
Duct sealing in Schertz runs $400 – $1,200 for most residential jobs. Single-family homes with straightforward attic access typically fall in the $500 – $800 range. Apartment and condo shared systems run $600 – $1,200 depending on unit count and building access. Duct insulation added to the job is $300 – $800 additional.
What moves the number: attic accessibility, linear footage of duct, whether insulation must be removed and replaced, and whether we’re working in a shared mechanical chase that requires building coordination. We do not quote per-vent or per-register. One flat price per system, agreed in writing before we touch anything. No per-vent pricing, no add-ons at the door.
Estimates are free. We inspect, measure leakage, and hand you a written price. You decide. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Schertz
Our crews work throughout the I-35 corridor northeast of San Antonio, including Universal City, Cibolo, Converse, and New Braunfels. Each community has its own housing stock and ductwork patterns, and we adjust our approach accordingly.
Serving Schertz, TX - Our Local Coverage Area
We’re based in the Schertz 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 Duct Sealing in Schertz
Apartment and condo duct sealing in Schertz often means working in shared mechanical closets and vertical chases rather than a private attic. We coordinate with property management, schedule around tenant access rules, and document airflow for every unit served by a common system. Call (361) 326-5060 to discuss your building’s specific layout.
Schertz’s rapid growth from the 1990s through the 2020s meant speed-built subdivisions with builder-grade flex duct and tape joints never intended to survive decades of 140°F+ attic heat. The housing is new by national standards, but the ductwork is aging fast in our climate. Call (361) 326-5060 for a leakage test.
We can seal accessible joints without major insulation disturbance, but the buried flex runs common in Schertz’s blown-in-insulation attics often require partial removal to reach and properly seal. We always ask first, quote it as a line item, and replace what we move. Call (361) 326-5060 for an inspection.
Caliche dust and cedar pollen load the return side of Schertz duct systems, accelerating wear at joints and coating the very surfaces that mastic must bond to. We clean before we seal, so the sealant adheres properly and lasts. Call (361) 326-5060 to schedule both services.
Yes. We regularly seal and restore shared vertical dryer-vent stacks in Schertz multi-family buildings, especially along FM 3009 and Schertz Parkway where these systems are common. We got a call from a property manager at a condo complex off FM 3009 where three upstairs units had weak airflow and long dryer cycles. A camera inspection of the shared vertical dryer stack showed torn flex duct and separated joints hidden above the ceiling line, so we sealed every accessible connection with mastic and UL 181 tape, then rebalanced the supply and return ducts. The units stopped sweating at the registers and the dryer lint pathway cleared enough to cut dry time in half. Call (361) 326-5060 for building-wide dryer vent assessment and sealing.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Schertz since 2004.