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 Helotes
Duct repair and sealing in Helotes typically costs $280-$680 for most residential jobs, with full-system mastic sealing on larger Sonoma Ranch homes running toward the higher end. We dispatch crews to Helotes from our San Antonio office daily, and most appointments are scheduled within 48 hours. If your upstairs registers are blowing dust or your energy bills have climbed since last summer, the problem is usually leaky flex collars or gaps in the trunk line that a builder’s handover inspection never caught.
We’re familiar with the specific duct problems Helotes homes develop. The master-planned subdivisions that define this northwest Bexar County community, Sonoma Ranch chief among them, were built fast during the 2000s and 2010s boom. Long two-story duct runs, residual construction debris, and the caliche-rich limestone dust that blows off active grading sites all stress systems harder than the original design intended. Our Duct Repair & Sealing team has worked in Helotes since we opened in 2013, and we’ve documented the same failure patterns often enough to know exactly what to look for on the first visit.
Why CleanRun Air Duct Cleaning San Antonio Is Helotes’s Preferred Duct Repair & Sealing Company
Helotes homeowners tend to research before they call. They bought into a high-growth Hill Country suburb at a premium price point, and they expect documentation for any claim a service company makes. We’ve served over 52,000 homes since 2013, every one with a written price before work started and a photo record when we left. That evidence-first approach matches how Helotes customers actually decide.
Our crews know the local housing stock. They’ve resealed flex duct in Sonoma Ranch two-stories where the original builder left collars unfastened. They’ve pulled yellowish-green cedar pollen films from return plenums after heavy January seasons. They’ve photographed caliche dust half an inch thick in branch runs that were never flushed after construction. This isn’t generic experience applied to a zip code. It’s repeated fieldwork in the same floor plans, on the same streets, against the same Hill Country environmental pressures.
Tomas Reyes, who leads CleanRun, established the Haven Standard in 2013 precisely because the duct cleaning industry ran on verbal promises and vanishing accountability. Every Helotes job operates under that standard: written price first, background-checked uniformed crew, documented photo record of every duct run, and the 365-Day Done Right Promise backed in writing. If the work isn’t right, we make it right. No manager approval required.
Our Duct Repair & Sealing Services in Helotes
Duct Sealing
Most Helotes homes lose 20-30% of conditioned air through leaks at joints, boots, and plenum connections before it ever reaches the registers. In Sonoma Ranch’s larger two-story plans, that percentage often runs higher because of the long branch runs and multiple elbows. We seal with mastic compound and reinforced mesh at every joint, then pressure-test to verify. A typical whole-system seal in Helotes runs $420-$680 for homes between 2,500 and 4,000 square feet.
Flex Duct Repair
Flex duct is common in Helotes construction from the 2000s and 2010s, and it fails predictably. The wire helix corrodes in humid attics. The insulation sleeve compresses where it was strapped too tight. Most often, the collar at the boot was never mechanically fastened at handover, drywall dust sits in the sag, and the first hard cooling season blows it all through the registers. We replace damaged sections with new flex, reseat collars with mechanical fasteners, and seal with mastic. Single-run repairs in Helotes typically run $180-$340; multiple runs or full trunk replacement goes higher.
Metal Duct Repair
Older metal ductwork in some Helotes infill homes develops rust at seams or separates at drive cleats. We cut out corroded sections, fabricate replacement pieces on site, and seal with mastic and foil tape rated for duct application. Metal repairs tend to be more localized than flex work, so pricing varies with accessibility and extent of damage.
Duct Insulation
Helotes attics hit 140°F in July and August. Duct insulation degrades. We replace compressed or moisture-damaged insulation with fresh wrap, sealed at all seams, to bring R-value back to where the system was designed to operate. This matters especially on the long runs to second-floor bedrooms in Sonoma Ranch plans, where every degree of attic heat gain works against the cooling load.
Mastic Sealant Application
Mastic is the standard for durable duct sealing, not foil tape alone. We brush or trowel water-based mastic with embedded mesh at every joint, boot, and plenum connection. It cures to a flexible, permanent seal that outlasts temperature cycling. In Helotes, where systems run eight months straight and attic temperatures swing 80 degrees seasonally, that durability matters.
Air Leak Repair
Leak detection starts with pressure testing the entire system, then smoke pencil or infrared verification at registers and returns. We mark every leak, photograph it, repair it, and photograph the sealed joint. The before-and-after images go in your job record with the written invoice.
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 Helotes
Our equipment roster includes Rotobrush agitation systems for source removal, Nikro negative-pressure extractors, and Abatement Technologies HEPA filtration. We don’t use shop vacs with duct attachments. These are trade-recognized machines that customers can look up independently, and we name them because Haven Standard Clause 1 requires transparency about what you’re paying for. For sealing work, we stock Guardsman-rated mastic compounds and mechanical fasteners sized for the flex duct and metal fittings common in Helotes construction. Parts availability means most Helotes jobs finish in one visit.
Common Duct Repair & Sealing Problems We See in Helotes Homes
- Builder-grade flex collars left unfastened at handover. The original construction crews in Sonoma Ranch and neighboring subdivisions often secured flex duct with zip ties or friction fit alone. Drywall dust and caliche grit from construction-phase blower testing sits in the sag. When the first real cooling season hits, the blower pushes it all into the living space. We find this in roughly half the Helotes homes built between 2010 and 2020 that we inspect.
- Yellowish-green cedar pollen film coating return plenums each January-February. Helotes sits in one of the densest Ashe juniper corridors in the San Antonio metro. Pollen loads here exceed central Bexar County by a significant margin. Standard 1-inch filters catch some of it. The rest packs into the return trunk and recirculates until a source-removal flush pulls it out. Homeowners who change the filter and assume the problem is handled are usually wrong.
- Caliche-rich limestone dust caking blower motors and choking filters May-September. The Balcones Escarpment location means persistent southwest winds pull dust off active grading sites and unpaved Hill Country roads directly into outdoor HVAC intakes. Back-to-back 100°F months mean systems run virtually nonstop, so that dust accumulates faster than in lowland communities. Low MERV filters fail first. Then the blower motor labors. Then the duct interior cakes.
- Long branch runs to second-floor bedrooms with inadequate support. Sonoma Ranch’s 2,500-4,000+ square foot plans often have duct runs exceeding 40 feet to far bedrooms. Unsupported flex sags, creating low points where debris collects and airflow drops. The rooms stay hot in July. The homeowner cranks the thermostat. The system runs longer. The energy bill climbs.
Pricing for Duct Repair & Sealing in Helotes, TX
| Service | Typical Range in Helotes |
|---|---|
| Single flex duct run repair/replacement | $180-$340 |
| Whole-system mastic sealing (2,500-3,500 sq ft) | $420-$680 |
| Return plenum cleaning + reseal | $280-$450 |
| Duct insulation replacement (per run) | $150-$280 |
| Full system inspection with photo documentation | $0 (included with any booked work) |
These are whole-system prices, not per-vent teaser rates. What you see is what you pay. Every Helotes job starts with a written price delivered before any panel comes off, under Haven Standard Clause 1. Factors that move you within these ranges: accessibility in the attic, extent of original construction debris, number of disconnected or leaking joints, and whether the system needs source removal before sealing can be effective. We also offer a Free Second Opinion on any written estimate from a competitor. Bring their quote; we’ll put our number next to it in writing.
We Also Serve Cities Near Helotes
Our crews work daily across northwest Bexar County and the surrounding metro, including Helotes, San Antonio, Bulverde, Converse, and Universal City. Scheduling and dispatch are coordinated from our San Antonio office, with local routing that keeps Helotes appointments within our standard 48-hour window.
Serving Helotes, TX - Our Local Coverage Area
We’re based in the Helotes 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 Helotes
Because builder handovers almost never include a proper duct flush. We got called out to a two-story Sonoma Ranch home where the upstairs registers were blowing chalky dust months after the family moved in. Camera inspection showed a half-inch of drywall dust and caliche grit from construction-phase blower testing sitting in the long branch runs, plus three disconnected flex collars at the second-floor boots. The builder’s warranty had expired. The homeowners had been breathing it for six months. We ran agitation tools and a Rotobrush under negative pressure, performed source removal into the supply and return ducts, then re-seated and mastic-sealed the collars. Airflow at the far bedrooms came back within an hour. If your home was built between 2010 and 2020 in Helotes, this scenario is more likely than not.
It’s mountain cedar (Ashe juniper) pollen, and it’s packed into your return plenum and trunk line. Helotes sits directly against the Hill Country along the Balcones Escarpment, placing it in one of the highest pollen corridors in the entire San Antonio metro. Standard filter changes catch some of it. The rest adheres to duct walls and recirculates through spring. The only way to remove it is source-removal extraction from the plenum and trunk, followed by sealing any gaps where fresh pollen can enter. Call (726) 600-7155 and we’ll show you on camera exactly what’s in there.
Dirty registers can mean either problem, or both. The definitive check is a pressure test of the duct system against the conditioned envelope. If total leakage exceeds 10% of fan flow, you’ve got leaks. In Helotes, we commonly find disconnected collars at boots, sagging flex with separated seams, and tape that failed in attic heat. We photograph every finding. The photo record goes to you with the written scope. If the duct is dirty but intact, we quote cleaning. If it’s leaking, we quote repair or replacement. Sometimes it’s both.
Yes. The Balcones Escarpment geology means caliche-rich limestone dust is everywhere in Helotes, and the persistent southwest winds of May through September pull it directly into outdoor HVAC intakes. We’ve photographed blower motors caked with it and filters choked solid after six weeks. The dust is fine enough to pass low-MERV filters and accumulate in branch runs. If your home is near active construction or unpaved roads, the load is heavier. A sealed duct system with proper filtration is the only real defense.
Rotobrush agitation tools for source removal inside the duct runs, Nikro negative-pressure extractors to pull debris into a contained HEPA-filtered collector, and Abatement Technologies filtration to protect air quality during the work. For sealing, we use Guardsman-rated mastic compound with reinforced mesh at all joints. Every tool is named so you can verify specifications independently. Haven Standard Clause 1 requires it.
Ready to see what’s actually in your ducts? Call CleanRun at (726) 600-7155 for a free written estimate. We’ll inspect the system, photograph what we find, and deliver a fixed price before any work begins. Every job includes a Documented Photo Record of every duct run and is backed by our 365-Day Done Right Promise.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Helotes since 2013.