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 Repair & Sealing Across Schertz
Most Schertz homeowners with a 10-year-old tract home in Crossvine, Homestead, or one of the newer northern subdivisions don’t realize their attic flex-duct has already been through 1,200+ days of 130°F heat cycles. That’s enough to loosen builder-grade collars, crack mastic seams, and pull return-air leaks that dump caliche dust straight from graded lots next door. Our Duct Repair & Sealing crews dispatch from our San Antonio office and typically reach Schertz properties within the same scheduling window. Call (830) 549-6847 and we’ll put a written price in front of you before any panel comes off.
Why CleanRun Air Duct Cleaning New Braunfels Is Schertz’s Preferred Duct Repair & Sealing Company
We’ve been documenting the inside of every duct run we touch since 2013. That practice started long before it became a marketing angle, and it matters especially in Schertz where the housing stock is young enough that most owners have never seen what their system looks like from the inside.
Our crews know the local build patterns: D.R. Horton and Lennar slab-on-grade layouts with attic air handlers, low decking that crushes flex runs, and return plenums sealed during framing that fail silently under thermal stress. We’ve photographed separated collars in Schertz attics that had been dumping conditioned air into insulation for three summers before the homeowner noticed the bedroom that never cooled.
Every technician is background-checked and uniformed under Haven Standard Clause 3: Verified Crews. You’ll get the technician’s name before arrival, a written scope before work starts under Haven Standard Clause 1, and a documented photo record of every run before we leave. The 365-Day Done Right Promise is backed in writing on every job, not just stated on the website.
We also offer a Free Second Opinion on any written estimate from another company. Bring us their number; we’ll put ours next to it in writing.
Our Duct Repair & Sealing Services in Schertz
Mastic Sealant Application
Mastic is a water-based paste that hardens into a permanent, flexible seal at duct joints, plenum connections, and collar interfaces. In Schertz’s 130°F attics, tape adhesives fail within two to three years; mastic survives the thermal cycling. We apply it to every accessible joint after repair, and we photograph the application as part of your documented record. A typical mastic sealant job on a Schertz home runs $280-$450 depending on accessible joint count.
Flex Duct Repair
Builder-grade flex duct in Schertz’s newer subdivisions was never designed for the attic environment it got. Heat cycling loosens the wire helix, the inner liner tears at elbows, and crushed runs under decking create dead zones where airflow drops to nothing. We replace damaged sections with new R-6 or R-8 flex, reconnect collars with mechanical fasteners plus mastic, and route around crush points where possible. Flex duct repair in Schertz typically ranges $180-$340 per run, with most homes needing two to four runs addressed.
Metal Duct Repair
Older Schertz homes and some custom builds use galvanized hard-pipe duct. We repair separated seams, corroded sections, and failed dampers. Metal work costs more per linear foot but lasts longer in aggressive attic environments. Expect $320-$580 for typical metal duct repair in Schertz.
Duct Insulation & Air Leak Repair
Return-air leaks are the hidden problem in Schertz’s edge-of-subdivision homes. When a return plenum pulls from a leaky joint instead of the grille, it sucks 130°F attic air or construction dust from graded lots next door. We pressure-test the system, locate leaks with smoke or infrared, seal with mastic or foil-backed butyl, and reinsulate where the original wrap has degraded. Air leak repair with insulation touch-up runs $340-$620 in Schertz.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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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.
BeforeAfterTrusted Brands We Service in Schertz
Our equipment roster includes Rotobrush agitation tools for compacted debris removal, Nikro negative-pressure extractors, and Honeywell and Aprilaire filtration components we stock for same-visit replacement. These aren’t proprietary names; you can look up every manufacturer independently and verify what the equipment does. When we recommend an Aprilaire MERV upgrade for a Schertz home pulling caliche dust, you can check the spec sheet yourself.
Common Duct Repair & Sealing Problems We See in Schertz Homes
- Separated flex-duct collars at the air handler. Builder-grade zip-tie and tape connections loosen after three to five summers in 130°F attics. The gap dumps conditioned air into insulation and pulls unfiltered attic air or construction dust into the return side. We find this in roughly half the Schertz homes we inspect that were built between 2010 and 2020.
- Return-side dust asymmetry from adjacent graded lots. In subdivisions still under buildout, completed homes next to active construction show dramatically heavier particulate on the return side than the supply side. This pattern signals infiltration through leaky return plenums or wall cavities, not filter bypass. The dust is caliche and concrete particulate, not household lint.
- Crushed flex runs under low attic decking. Slab-on-grade homes at 2,000-3,000 sq ft pack a lot of duct into a small attic footprint. Installers route flex under decking to clear framing, and over time the compression kinks the wire helix and collapses airflow to distant rooms. Homeowners notice the symptom (one bedroom won’t cool) long after the damage is done.
- Ashe juniper pollen loading during December-February. Schertz’s location on the Hill Country fringe puts it in the zone for intense cedar pollen. Homeowners seal windows and run recirculating air continuously, pushing allergen past standard filters and into the blower compartment. Undersized or poorly sealed return ducts accelerate the loading.
Pricing for Duct Repair & Sealing in Schertz, TX
We publish ranges because Haven Standard Clause 1 requires a written price before work starts, every time. Here’s what duct repair and sealing costs in Schertz’s market:
| Service | Typical Range |
|---|---|
| Mastic sealant (full system) | $280-$450 |
| Flex duct repair (per run) | $180-$340 |
| Metal duct repair | $320-$580 |
| Air leak repair with insulation | $340-$620 |
| Full system assessment with photo documentation | $0 (included with any repair) |
What moves you within the range: attic accessibility, number of runs affected, whether the air handler platform needs repositioning to reach collars, and whether we find additional leaks during pressure testing. We don’t do per-vent pricing or $79 teaser coupons. One flat price per system, agreed in writing, before any work starts. Call (830) 549-6847 for a free estimate.
We Also Serve Cities Near Schertz
Our crews work Schertz properties weekly and also handle calls from Universal City, Cibolo, Converse, and New Braunfels. Dispatch is coordinated from our San Antonio office, so rural properties on the edges of any of these cities get the same scheduling priority as in-town jobs.
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 - Duct Repair & Sealing in Schertz
Every 3-4 years for rural and edge-of-subdivision properties, not the generic 5-7 you’ll see quoted elsewhere. Unpaved road dust, open land pollen, and proximity to active construction lots load ducts faster than the national average. The 130°F Schertz attic bakes that debris into a compacted layer that resists passive cleaning. Call (830) 549-6847 and we’ll show you on camera what your interval should be.
Return-side dust asymmetry signals infiltration through leaky plenums or wall cavities, not filter bypass. In Schertz subdivisions adjacent to graded lots, we routinely find return systems pulling caliche dust and concrete particulate from outside the conditioned envelope. The supply side pushes filtered, conditioned air; the return side sucks from wherever it can. We locate the leak with pressure testing, seal it with mastic, and document the before and after.
Yes. Schertz’s 2005-2020 housing stock is in the exact sweet spot where first-time duct service is overdue. Builder-grade flex-duct collars fail at 5-10 years in 130°F attics, and many owners have no maintenance history because the home was a rental or military turnover near JBSA-Randolph. The camera doesn’t care about the calendar year; it cares about what it finds inside the run.
They need more frequent inspection and typically shorter repair intervals. Outbuilding systems run longer duct lengths with more elbows, experience wider temperature swings, and often use lower-grade materials than the main house. We assess these as separate zones with their own pressure profiles and photo records. Pricing follows the same per-system structure.
We start with a camera inspection of every accessible run, pressure-test the system to locate leaks, then deliver a written scope and price before touching tools. Approved work includes collar reconnection with mastic, crushed run replacement, plenum sealing, and insulation touch-up. Every step is photographed. The documented photo record is delivered as part of the standard job record. Call (830) 549-6847 to schedule.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Schertz since 2013.