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 Selma
Duct repair and sealing in Selma typically runs $280-$780 for most homes, depending on whether we’re re-clamping separated flex runs, sealing joints with mastic, or replacing crushed sections in tight attic chases. Most Selma jobs are scheduled within a few business days and completed in a single visit. Call (726) 600-7155 for a written estimate before any work starts.
We know Selma’s housing stock well. The production-built subdivisions that filled in along the IH-35/Loop 1604 corridor from the late 1990s through the mid-2000s, neighborhoods like Bentwood and the City Hall corridor, share a common problem: original flex ductwork that’s now hitting the age where stapled boot connections sag, tape turns brittle, and conditioned air starts dumping into 140-degree attics instead of reaching your rooms. Our crews serve Selma from our San Antonio dispatch office, and we’ve documented the same failure patterns often enough to spot them fast.
Why CleanRun Air Duct Cleaning San Antonio Is Selma’s Preferred Duct Repair & Sealing Company
We’ve been in Selma homes since 2013, and the pattern is consistent. The city’s post-1990 build-out created a concentrated pocket of homes all aging out of their original ductwork simultaneously. Where older San Antonio neighborhoods mix housing eras and duct types, Selma’s uniformity means we’ve developed specific repair protocols for the stapled-boot flex failures that volume builders used here.
Our Duct Repair & Sealing in Selma work is backed by the 365-Day Done Right Promise - a written guarantee, not a policy subject to manager approval. Every job starts with a written price delivered before a single panel comes off, per Haven Standard Clause 1. No “call for a quote.” The number you get is the number on the invoice.
Technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews. You’ll get the technician’s name before arrival, and every duct run will be photographed before and after, delivered as part of your standard job record. The photo record is how we document what was actually found - a 3-inch debris build-up at the first elbow, a separated boot dumping air into the plenum space, a crushed run kinked over a truss - not vague claims about “dirty ducts.”
Our Duct Repair & Sealing Services in Selma
Duct Sealing with Mastic Sealant
Selma’s original builder-grade tape has a predictable lifespan. In the attics off Lookout Road and the Retama Parkway corridor, we regularly find tape that turned brittle before the first decade was out. Mastic sealant is the permanent fix - a thick, fiber-reinforced compound brushed onto joints and seams that cures to a flexible, airtight bond. We apply it to plenum connections, boot collars, and longitudinal seams on metal trunk lines. On a typical Selma home, full-system mastic sealing runs $340-$580. The work includes pressure-testing to verify seal integrity before we close the access panel.
Flex Duct Repair
This is where Selma’s housing stock shows its age most clearly. The flex duct installed by production builders in the 1990s and 2000s was often stapled to boot connections rather than clamped - a faster method during rushed build-outs, but one that guarantees eventual separation as the flex sags and the staple tears through the mylar jacket. On a 2004 tract home off Bentwood Drive near the Selma City Hall corridor, our tech ran a camera inspection down the main trunk and found the flex duct had separated cleanly at the boot behind the primary bedroom register - builder-grade tape long gone brittle. We re-clamped the connection, sealed the boot collar with mastic, wrapped the exposed run in R-8 duct insulation, then completed source removal with our Rotobrush and HEPA filtration to clear the drywall dust left from the original build-out. The homeowner had been paying to cool the attic for years without knowing it. Flex duct repair in Selma typically runs $180-$420 per run, depending on accessibility and whether replacement length is needed.
Metal Duct Repair
Some Selma homes, particularly later builds in the Evans Road area, use galvanized steel trunk lines with flex take-offs. Where these metal trunks corrode at seams or suffer impact damage from service work in the attic, we cut out the affected section and splice in new material with sealed drive cleats. Metal repair is less common in Selma than flex work, but when it’s needed, it requires precise sheet-metal fabrication. Typical range: $320-$650.
Duct Insulation Replacement
Unconditioned Selma attics reach extreme temperatures - well over 140°F in summer. Original R-4 or R-6 flex insulation degrades in that environment, and once the fiberglass wrap compresses or the vapor barrier tears, you’re losing thermal energy through the duct wall even if the air doesn’t leak. We replace degraded insulation with R-8 duct wrap or pre-insulated flex, secured with proper mechanical fasteners. Insulation work in Selma runs $260-$540 for typical residential systems.
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 equipment roster includes Rotobrush for mechanical agitation in flex runs, Nikro HEPA-negative pressure systems for contained debris extraction, and Honeywell and Aprilaire filtration components where upgrades make sense. We stock common boot sizes, clamp types, and mastic compounds for Selma’s predominant duct configurations, which means most repairs don’t wait on parts. When we find a failure pattern we’ve seen before - and in Selma, we usually have - the fix moves faster because the right materials are already on the truck.
Common Duct Repair & Sealing Problems We See in Selma Homes
- Stapled boot connections separating in attic heat. The production builders working Selma’s rapid-growth corridors near IH-35 and Loop 1604 often secured flex duct with staples instead of mechanical clamps. After 15-25 years of thermal cycling in 140-degree attics, those staples tear through the mylar jacket and the run separates, dumping conditioned air into the plenum space above your ceiling.
- Never-cleaned registers masking underlying leaks. Original registers in Selma’s 1990s-2000s builds frequently hold construction-phase drywall dust and insulation fragments from rushed finish work. Homeowners call for cleaning, but the camera inspection reveals the real problem: a separated boot or crushed run that’s been choking airflow since move-in.
- Collapsed flex over truss chords. The tight attic chases in Selma’s tract construction left flex duct pulled taut over truss members. Over years of vibration and thermal expansion, the duct kinks at the hard point, crushing the internal helix and reducing airflow to a trickle. The blower motor overheats trying to compensate.
- Brittle builder-grade tape at plenum connections. The tape used on original Selma systems was never rated for 9-10 months of annual cooling operation in Texas attic conditions. It dries, cracks, and fails - first at the hottest points near the air handler plenum, then progressively along the trunk.
Pricing for Duct Repair & Sealing in Selma, TX
Here’s what duct repair and sealing actually costs in Selma’s market:
| Service | Typical Range |
|---|---|
| Single flex duct repair/re-clamp | $180-$340 |
| Flex duct replacement (per run) | $280-$420 |
| Mastic sealing (full system) | $340-$580 |
| Duct insulation replacement | $260-$540 |
| Metal trunk repair/splice | $320-$650 |
| Camera inspection with written report | $85-$140 (credited toward repair) |
These are whole-system or per-item prices, not per-vent teaser rates. What drives the number up: multiple separated runs, collapsed sections requiring replacement length, or metal fabrication. What keeps it down: accessible attics, single-point failures, and early intervention before the blower motor sustains damage. Every price is written and agreed before work starts - Haven Standard Clause 1. No exceptions. Bring a competitor’s written estimate and we’ll provide a Free Second Opinion, our number next to theirs.
We Also Serve Cities Near Selma
Our crews work throughout the San Antonio metro, including Selma and nearby Alamo Heights, Castle Hills, and Terrell Hills. The same documented approach - written price first, photo record after, 365-Day Done Right Promise - applies whether we’re re-clamping a separated boot off Bentwood Drive or sealing metal trunks in a 1950s Alamo Heights ranch.
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
Camera inspections in Selma homes most commonly reveal separated flex duct at stapled boot connections, crushed runs over truss chords, and construction debris still lodged in original registers from the build-out. The camera shows exactly what the homeowner cannot see: a 4-inch gap where conditioned air pours into the attic, or a kinked run choked down to half its diameter. We deliver the footage as part of your documented photo record. Call (726) 600-7155 to schedule - estimates are free.
Weak airflow from a never-cleaned register in a Selma home usually indicates duct repair, not just cleaning. The “never cleaned” status often means original construction debris is still in the register, but the root cause is typically a separated boot or crushed flex run that a cleaning alone won’t fix. We run the camera first to distinguish between debris accumulation and mechanical failure, then quote the correct scope. Call (726) 600-7155 for a written diagnosis.
Selma’s 9-10 month cooling season and attic temperatures exceeding 140°F accelerate flex duct degradation significantly compared to cooler climates. The constant thermal cycling - expansion in summer heat, contraction in brief winter periods - fatigues the mylar jacket and adhesive tapes faster than in regions with shorter HVAC seasons. Mountain cedar and oak pollen loads, heavy from December through spring, also concentrate debris inside ductwork that already suffers from reduced airflow due to mechanical failures.
Yes. Crushed flex duct in Selma’s tight attic chases is repairable by replacing the damaged length with new properly-supported flex, or in some cases by rerouting to avoid the hard point that caused the kink. We verify full diameter restoration with airflow measurement before closing the access. Typical cost for crushed run replacement in Selma: $280-$420. Call (726) 600-7155 for a written quote on your specific configuration.
Sealing ducts helps allergy control in Selma by preventing the system from pulling unfiltered attic air - laden with pollen, insulation particles, and dust - through leaks in the return side. The San Antonio metro’s severe allergy ranking means your HVAC filter is your primary defense, but that defense is compromised when the duct system itself is drawing from the attic instead of through the filter. Mastic sealing closes those pathways, and when combined with proper filtration upgrades, reduces the allergen load circulating through your living space.
Ready to find out what’s actually happening in your ductwork? Call (726) 600-7155 for a written estimate. We’ll run the camera, show you what we find, and deliver a fixed price before any work starts. Every repair is photographed, documented, and backed by our 365-Day Done Right Promise.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Selma since 2013.