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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Before
AfterFast, Reliable Duct Repair & Sealing Across Selma
Duct repair and Selma Dryer Vent Cleaning typically runs $280-$650 for most residential jobs, with flex duct repairs starting around $320 and full-system mastic sealing for a standard single-story home landing between $450 and $680. We’re usually on Selma jobs within one to two business days of the call, scheduling from our San Antonio dispatch office. If you’re noticing uneven cooling between rooms, rising utility bills, or dust that keeps returning right after cleaning, the problem is often in the ductwork itself, not the HVAC equipment. Call (830) 549-6847 for a written estimate before any work starts.
Selma’s housing story is different from older Texas cities. Nearly every home here went up during the post-2000 I-35/Loop 1604 boom, and that matters for what’s happening inside your ducts. Our crews know the subdivisions, the production-build schedules, and the specific failure modes that show up in Selma’s slab-on-grade tract homes with attic-routed flex duct. We’ve been documenting what we find since 2013.
Why CleanRun Air Duct Cleaning New Braunfels Is Selma’s Preferred Duct Repair & Sealing Company
We’ve served Selma homeowners since the brand’s founding in 2013, and the pattern here is consistent enough that our technicians can usually predict what they’ll find before the camera goes in. Construction debris sealed inside flex runs during fast production builds. Kinked attic duct left unsupported between trusses. Register boots that were never properly sealed to the ceiling drywall. These aren’t hypotheticals; they’re what our photo records show on Selma jobs week after week.
Our Duct Repair & Sealing in Selma work is backed by the 365-Day Done Right Promise, written on every job, not buried in a policy manual. Haven Standard Clause 1 requires a written price before any work begins, and we mean any work, no exceptions. Haven Standard Clause 3, Verified Crews, means the technician who arrives at your Selma home is background-checked, uniformed, and identified by name before the truck turns onto your street.
Every customer receives a Documented Photo Record as a standard deliverable, not an upsell. The inside of every duct run, before and after. You can compare what was actually found against what was quoted. If a competitor has already given you a written estimate, we provide a Free Second Opinion at no cost, our number next to theirs.
Our Duct Repair & Sealing Services in Selma
Duct Sealing
Most Selma homes lose 20-30% of conditioned air through leaks at register boots, plenum joints, and collar connections before it ever reaches the rooms. On slab-on-grade construction, those leaks dump directly into the attic or wall cavities. We seal with mastic compound and fiberglass mesh, not tape that dries and fails. A typical duct sealing job in Selma runs $450-$680 for a single-story home with 8-12 registers, with larger two-story homes in subdivisions like The Ridge at Selma or Retama Springs ranging up to $890. Every joint is photographed before and after sealing.
Flex Duct Repair
Flex duct is standard in Selma’s production-built homes, and it’s where we find the most preventable problems. The polyethylene liner tears at contact points with trusses. Kinks form where runs were left without proper strapping. Insulation slides away from the core, creating condensation points that breed mold. Flex duct repair in Selma typically costs $320-$580 per run, depending on attic access and whether the plenum connection needs reworking. We use supported, properly strapped replacement runs, not patched sections that will fail again. Our field team carries Honeywell and Aprilaire fittings sized for the standard 6-inch and 8-inch flex common to Selma’s build era.
Metal Duct Repair
Some Selma homes, particularly custom builds near Retama Parkway and earlier construction along Lookout Road, use galvanized steel trunk lines with flex branches. Metal duct suffers seam separation, rust at condensation points, and vibration cracks near the air handler. Metal repair runs $380-$720 in Selma, with rust remediation and internal coating at the higher end. We photograph the full trunk length because metal damage is often worse than what shows at the registers.
Duct Insulation
Attic temperatures in Selma peak above 140°F in July and August. Uninsulated or degraded duct insulation forces your AC to overcome radiant heat gain before the air even leaves the attic. Re-insulation with R-6 or R-8 fiberglass wrap runs $2.80-$4.20 per linear foot in Selma, with most single-story homes needing 60-90 feet of trunk and branch coverage. We specify the R-value in writing before work begins, and we photograph the insulation condition at every access point.
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 Selma
Our Selma crews stock fittings and components from Honeywell, Aprilaire, and Abatement Technologies, brands that publish specifications customers can verify independently. We don’t use proprietary parts that lock you into future service calls. For duct sealing and repair, that means mastic compounds rated for 200°F continuous exposure, mechanical fasteners that exceed SMACNA standards, and register boots that match the dimensions common to Selma’s 2000s-2010s construction. If your system uses Guardsman dampers or Honeywell zone controls, we carry those components too. Parts availability matters for turnaround; we don’t order-and-wait on standard Selma configurations.
Common Duct Repair & Sealing Problems We See in Selma Homes
- Construction debris sealed inside new flex duct. Drywall dust, blown-in insulation fibers, and caliche soil particles from the build site get trapped in duct runs before the first homeowner ever turns on the HVAC. The first real cleaning is often delayed because the home is “too new to be dirty,” but the camera shows otherwise.
- Kinked or unsupported attic flex acting as debris dams. Fast production schedules left flex runs pinched between trusses or sagging without strapping. These kinks restrict airflow enough that homeowners report uneven cooling, and the restriction point collects debris that a standard cleaning can’t fully clear.
- Loose register boots and unsealed collars leaking conditioned air into the attic. On Selma’s slab-on-grade homes, the boot-to-drywall seal is often caulk-only or missing entirely. During December through February, when mountain cedar pollen is at peak concentration, those leaks draw unfiltered attic air into the return side.
- Collapsed flex runs misdiagnosed as equipment problems. We’ve traced “undersized” AC complaints in Selma to a single crushed 8-inch branch line that was reducing effective capacity by 40%. The equipment was fine; the duct was not.
Pricing for Duct Repair & Sealing in Selma, TX
Here’s what duct repair and sealing costs in Selma’s market, based on jobs we’ve completed with written prices under Haven Standard Clause 1:
| Service | Typical Range in Selma |
|---|---|
| Single register boot sealing (mastic) | $180-$260 |
| Flex duct repair, per run | $320-$580 |
| Metal duct seam repair, per section | $380-$720 |
| Full-system mastic sealing, single-story | $450-$680 |
| Full-system mastic sealing, two-story | $680-$890 |
| Duct insulation replacement, per linear foot | $2.80-$4.20 |
| Air leak detection and sealing (pressurized test) | $340-$520 |
These are whole-system prices, not per-vent teaser rates that balloon once the van is in your driveway. What moves a Selma job toward the higher end: attic access difficulty (steep pitch, limited scuttle holes), multiple kinked runs requiring complete replacement rather than spot repair, and metal duct with rust remediation needs. Every price is written and agreed before a single panel comes off. Estimates are free. Call (830) 549-6847 for an exact quote on your Selma home.
We Also Serve Cities Near Selma
Our Duct Repair & Sealing crews work throughout the I-35 corridor, including Selma, New Braunfels, Cibolo, Seguin, and Schertz. Scheduling and dispatch are coordinated from our San Antonio office, with route optimization that keeps Selma appointments within standard lead times. Same equipment roster, same written pricing, same photo documentation standard.
Serving Selma, TX - Our Local Coverage Area
We’re based in the Selma 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 Selma
Yes, and the camera usually proves it. Selma’s 2016 homes were built during compressed production schedules that left drywall dust, insulation fibers, and caliche soil sealed inside flex duct runs before move-in. The debris isn’t from your household; it’s from the construction site. We recommend a full inspection with photo documentation within the first two years of ownership. Call (830) 549-6847 for a free estimate.
The most common cause is a kinked or collapsed flex duct run in the attic, not a capacity problem with the equipment itself. On a 2016 build in the Mesa Verde subdivision off Loop 1604, the homeowner kept getting a hot primary bedroom while the air handler ran fine, and a camera inspection found a kinked flex run pinched between a truss and an unsupported sag, packed with drywall dust and caliche grit. We cut out the crushed section, re-ran the branch on new strapping, resealed the collars with mastic, and pushed the system back to matched supply-and-return flow. The uneven cooling cleared up the same day, no equipment swap needed. Call (830) 549-6847 if one room in your Selma home is persistently off-temperature.
Selma sits in the Ashe juniper belt, and mountain cedar pollen from late November through February is among the most intense allergen events in North America. HVAC systems running during those months draw significant pollen loads into ductwork. If your register boots or plenum joints are leaking, that pollen gets pulled into the return side and recirculated. Proper sealing with mastic, not tape, is the specific fix. Call (830) 549-6847 for a leak inspection before next cedar season.
A responsible builder would have run a negative-pressure extraction pass through all duct runs after construction cleanup, sealed every register boot to the drywall with mastic and mechanical fasteners, supported all flex runs with strapping at 4-foot intervals per SMACNA guidelines, and pressure-tested the system to verify no leaks exceeded 5% of total airflow. In Selma’s production-build environment, those steps were routinely skipped. We document what’s actually there, then quote the correction in writing. Call (830) 549-6847 for a post-build inspection.
Yes, on every job that involves contamination removal, not just surface cleaning. Negative-pressure extraction, using equipment from Nikro and Abatement Technologies, pulls loosened debris toward a contained collection point rather than pushing it into the living space. Source removal means the debris leaves the home, not just gets redistributed. We photograph the extraction process and the collection chamber contents as part of the standard Documented Photo Record. Call (830) 549-6847 to schedule.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Selma since 2013.