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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Repair & Sealing Across Terrell Hills
Most Terrell Hills homes run two or three separate duct systems, not one. Duct repair and sealing here typically costs $280-$680 per system depending on whether we’re sealing accessible flex runs, repairing original galvanized steel plenums, or re-insulating attic ductwork degraded by 140°F summer heat. Our Duct Repair & Sealing crews serve Terrell Hills directly from our San Antonio office, and we’ve worked the specific multi-zone layouts common to the neighborhood’s 1940s-1960s custom brick homes since 2013. Call (726) 600-7155 for a written price before any work starts.
Why CleanRun Air Duct Cleaning San Antonio Is Terrell Hills’s Preferred Duct Repair & Sealing Company
We’ve documented the inside of duct systems in Terrell Hills homes on Ivy Lane, Belmont, and near the Alamo Heights border - enough to know that a “standard” duct cleaning quote here is usually wrong. The 1.5-square-mile enclave’s pre-1960 housing stock demands per-system pricing and system-by-system documentation, because one address can hide three separate air handlers with three separate failure modes.
Our reputation in Terrell Hills is built on what we can show, not claim. Every job starts with a written price under Haven Standard Clause 1. Every duct run is photographed before and after. The 365-Day Done Right Promise applies in writing, not as a verbal assurance. Technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and identified by name before arrival.
Customers here research before calling. That’s why we publish our equipment roster - Rotobrush, Nikro, Honeywell, Aprilaire - and our license number on every page. Bring any competitor’s written estimate; we’ll deliver a free second opinion in writing, line item against line item.
Our Duct Repair & Sealing Services in Terrell Hills
Duct Sealing with Mastic Sealant
Terrell Hills’s original galvanized steel plenums develop seam leaks that bleed conditioned air into attics hitting 140°F in July. Mastic sealant - a fiber-reinforced water-based compound we brush onto seams and joints - outperforms tape for permanent closure on metal surfaces. On a recent job near Fort Sam Houston, we sealed 34 linear feet of plenum seams and dropped the system’s static pressure loss from 0.82 to 0.31 inches. The homeowner received before-and-after photos and the pressure readings as part of the standard job record.
Flex Duct Repair
Early-generation flex duct in Terrell Hills’s mid-century homes cracks and sheds liner fibers after decades of thermal cycling. Because these homes often route flex runs through hard-to-access attic chases between multiple zones, one failed run can starve an entire wing while the other two systems mask the symptom. We replace damaged flex with new insulated duct, secure it with mechanical fasteners rather than zip ties, and photograph every connection point. The camera doesn’t lie about what was actually replaced.
Metal Duct Repair
Original sheet-metal ductwork in Terrell Hills’s 1950s-1960s homes frequently includes intact cardboard-based duct liner - a material that harbors mold and biological growth that register-level cleaning never reaches. We perform source removal from the air handler through the supply and return ducts, then repair or replace corroded metal sections. This is not a quick vacuum job. It requires negative-pressure extraction with HEPA filtration, and it produces documentation the homeowner can reference if they sell the home or transfer base housing.
Duct Insulation
Summer attic temperatures in Terrell Hills routinely exceed 140°F, accelerating flex duct insulation breakdown that deposits fibers directly into the air stream. We re-insulate attic runs with formaldehyde-free fiberglass wrap or closed-cell foam insulation depending on access and clearance, sealing the vapor barrier to prevent condensation in winter. Every re-insulated run is photographed before wrap and after. The photo record is delivered as a standard deliverable, not an upsell.
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.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Terrell Hills
CleanRun carries professional-grade equipment from Rotobrush, Nikro, Honeywell, and Aprilaire - brands any homeowner can look up independently before agreeing to a price. We stock common flex duct diameters, mastic compounds, and metal repair fittings locally, so most Terrell Hills jobs don’t wait on parts. Our technicians train on manufacturer specifications, not improvised methods. If your system uses Honeywell zone dampers or Aprilaire media air cleaners, we document their condition in the same photo record as the ductwork itself.
Common Duct Repair & Sealing Problems We See in Terrell Hills Homes
- Original galvanized steel plenum seam failure. The plenum - the metal box where your air handler connects to the duct system - develops leaks at corners and seams after 60+ years of expansion and contraction. In Terrell Hills’s multi-system homes, the plenum is often hidden above a finished ceiling, so the leak bleeds conditioned air for years before anyone traces the efficiency loss to its source.
- Cardboard-based duct liner degradation. Pre-1960 homes here frequently contain this obsolete material, which breaks down into the air stream and provides a substrate for biological growth. A quick register cleaning leaves it untouched. Only full source removal with negative-pressure extraction actually removes it.
- Mountain cedar pollen infiltration through unsealed duct seams. San Antonio’s December-February pollen season ranks among the most severe allergenic events in the U.S. Fine particulate enters duct systems through gaps that would be sealed in newer construction, then recirculates for months. Sealing these entry points during repair work is standard practice for us, not an add-on.
- Zone starvation from failed flex runs in multi-system homes. One cracked flex duct in a three-system house can leave a bedroom wing under-conditioned while the other two systems cycle normally. Homeowners often blame the thermostat or the AC unit itself. Our camera inspection finds the actual failure point.
Pricing for Duct Repair & Sealing in Terrell Hills, TX
A typical duct sealing job in Terrell Hills runs $280-$450 per system for accessible flex duct and plenum seam work. Metal duct repair involving source removal and liner replacement runs $480-$680 per system. Duct insulation replacement adds $180-$320 per system depending on linear footage and attic access difficulty. Whole-house pricing doesn’t work here - a three-system home on Belmont requires three separate scopes of work, three separate photo records, and three separate static pressure verifications.
What moves the number: attic access (crawl vs. walk-in), number of disconnected or crushed runs, presence of cardboard liner requiring full removal, and whether the plenum itself needs repair or replacement. We deliver a written price before any panel comes off, every time, under Haven Standard Clause 1. No per-vent pricing. No coupon bait. Call (726) 600-7155 and we’ll put the exact number in writing for your specific systems.
We Also Serve Cities Near Terrell Hills
Our crews work Duct Repair & Sealing in Terrell Hills regularly, with neighboring service in San Antonio, Alamo Heights, Castle Hills, and Leon Valley. Dispatch and scheduling are coordinated from our San Antonio office; crews serve Terrell Hills locally without the delay of routing from distant depots.
Serving Terrell Hills, TX - Our Local Coverage Area
We’re based in the Terrell Hills 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 Terrell Hills
We price per system, because each system has its own plenum, its own duct runs, and its own photo record. A three-system home on Ivy Lane or near the Alamo Heights border requires three separate scopes of work, three separate static pressure readings, and three separate sets of before-and-after documentation. Whole-house pricing would force us to guess at hidden conditions or cut corners on verification. Call (726) 600-7155 for a written per-system estimate - estimates are free.
Most Terrell Hills plenums can be repaired. We seal seam leaks with mastic sealant, reinforce corroded corners with metal patches, and verify airtightness with static pressure testing. Full replacement is only necessary when the plenum has structural failure or asbestos-containing insulation - rare, but we test before disturbing anything. The camera inspection shows you exactly which condition yours is in before you commit to any work. Call (726) 600-7155 to schedule the inspection.
You receive a Documented Photo Record of every duct run, before and after, plus written static pressure readings and a scope-of-work summary. This is standard on every CleanRun job, not an upgrade. For Terrell Hills’s multi-system homes, the documentation is organized by system so you have a verifiable record for each air handler. If you transfer base housing or sell the home, the photo record demonstrates that the work was actually performed. Call (726) 600-7155 to discuss what your specific home’s documentation would include.
Yes. San Antonio’s December-February mountain cedar season drives massive fine-particulate infiltration through unsealed duct seams, and Terrell Hills’s older homes have more of those entry points than newer construction. Sealing in late fall prevents the winter pollen load from entering and recirculating. If you’re already experiencing heavy indoor allergen loads during cedar season, we can inspect for infiltration points and prioritize sealing the return side, where the system actively draws in attic and wall cavity air. Call (726) 600-7155 to schedule before peak season.
We remove it completely through source removal with negative-pressure extraction and HEPA filtration, then repair or replace the underlying metal duct. This is not a surface cleaning. The cardboard liner is an obsolete material that harbors mold and sheds particles into the air stream; leaving it in place defeats the purpose of duct repair. Our process produces waste that is bagged and removed from your property, and the photo record documents the liner’s removal. Call (726) 600-7155 for a camera inspection that will show you whether your system contains this material.
On a 1950s architect-designed brick home off Ivy Lane, our techs ran a camera inspection and found three separate systems: a main air handler plus two attic units, all tied into the home’s original galvanized steel plenum with failing cardboard-based duct liner. We performed source removal on each system under negative pressure with HEPA filtration, sealed the disconnected flex duct runs and open plenum seams with mastic sealant, and re-insulated the attic runs. The homeowner finally had documentation - before-and-after camera photos and static pressure readings - for work they could never see inside their own walls.
Terrell Hills’s position directly adjacent to JBSA-Fort Sam Houston means a steady rotation of military families inherit these aging duct systems with zero cleaning history. Multi-decade debris accumulation is essentially the default condition. The 365-Day Done Right Promise applies to every system we touch, backed in writing, because accountability matters most on work you cannot verify yourself.
Ready for a written price on your Terrell Hills home’s duct systems? Call (726) 600-7155. We’ll answer live, schedule at your convenience, and deliver a documented scope before any work begins.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning San Antonio, serving Terrell Hills since 2013.