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 Kirby
Duct repair and sealing in Kirby, TX typically runs $280-$620 for most residential jobs, with full-system re-sealing of a 1950s-1970s ranch home landing in the $450-$850 range. Our crews are dispatched from the San Antonio office and carry mastic sealant, metal duct repair materials, and replacement insulation on every truck, so most Kirby repairs finish in a single visit. Call (830) 549-6847 and we’ll put a written price in front of you before any panel comes off.
We know Kirby’s housing stock. The compact ranch homes built for Randolph AFB workers and military families, the original metal trunks cooking in 140°F attics, the flex duct runs packed with cedar pollen and caliche dust from unpaved roads. Our Duct Repair & Sealing team has handled these exact systems since 2013. This isn’t theoretical. We’ve photographed the inside of hundreds of Kirby duct runs, and the patterns are consistent enough that we stock specific materials for this market.
Why CleanRun Air Duct Cleaning New Braunfels Is Kirby’s Preferred Duct Repair & Sealing Company
Kirby’s independent city status surrounded by San Antonio creates a service gap that larger metro operators don’t close well. They route calls through centralized dispatch, miss the military-renter turnover cycle, and send technicians who’ve never crawled a Kirby attic. We schedule Kirby directly from our San Antonio office and our crews know the difference between a 1962 ranch off FM 78 and a 1974 split-level near Loop 410.
Our reputation here is documented, not claimed. 52,000+ homes served since 2013, every one with a written price before work started and a photo record delivered after. Kirby customers receive the same deliverables: before-and-after images of every duct run, a written scope of work, and the 365-Day Done Right Promise backed in writing on every job. Haven Standard Clause 1: Written Price Before Any Work Starts. Haven Standard Clause 3: Verified Crews. Tomas Reyes built this into the operating system from day one.
Response time to Kirby is same-day or next-day for standard repairs. We don’t manufacture urgency. Duct sealing is scheduled work, and we keep slots open because we know the seasonal patterns: cedar fever season from December through February loads returns with fine allergen debris, and the first 95°F day in May reveals which attic trunks separated over winter. Plan accordingly, and we’ll plan with you.
Free Second Opinion on any written estimate: bring a competitor’s Kirby quote and we’ll put our number beside it, line item by line item, in writing. No charge.
Our Duct Repair & Sealing Services in Kirby
Mastic Sealant Application
Kirby’s original metal duct trunks, installed in the 1950s through 1970s, were sealed with water-based duct mastic that degrades predictably after decades in 140°F attic heat. We remove the failed material, clean the joint surfaces, and apply new solvent-based mastic rated for continuous exposure to 200°F. On a typical Kirby ranch, this means re-sealing 12-18 trunk-and-branch connections, plus the plenum-to-furnace joint. The camera shows the difference: pre-repair, smoke pencil testing reveals visible leakage at 60% of fittings. Post-repair, static pressure holds within 0.1 inches of design spec.
Metal Duct Repair
The internal fiberglass liner in Kirby’s aging metal ducts sheds particulates when the adhesive binding it to the sheet metal fails. Last August we took a call on a 1962 ranch off FM 78 near the Kirby city limits where the homeowner had just PCSed in from JBSA-Randolph. Our tech ran a camera inspection down the main supply trunk and found the original internal fiberglass liner shedding into the airstream, plus three separated branch takeoffs dumping cold air into a 148°F attic. We rebuilt the failed joints with mastic sealant, repaired the liner sections, re-insulated the run, and pulled the system back to stable static pressure. Metal duct repair in Kirby runs $320-$580 for trunk work, $180-$340 per branch repair.
Flex Duct Repair
Kirby properties on unpaved ranch roads pull fine caliche dust and Ashe juniper pollen through return air systems at rates that clog flex duct corrugations. The blower motor works harder, amp draw rises, and the flex duct itself degrades from the inside out. We replace damaged flex runs with insulated, vapor-barrier-rated duct, seal the connection collars with dual-band mechanical fasteners plus mastic, and photograph the full length. A typical Kirby flex duct replacement: $240-$420 per run, depending on attic access.
Duct Insulation Replacement
Attic insulation on Kirby’s metal trunks was originally R-4 or R-6 fiberglass wrap with a foil facing. After sixty years, the facing separates, the fiberglass compresses, and the effective R-value drops below R-2. We strip the old wrap, repair any underlying metal damage, and install new R-8 fiberglass duct wrap with a reinforced foil vapor barrier, secured with metal banding at 18-inch intervals. Full trunk re-insulation on a Kirby ranch: $380-$650. Partial spot repair: $150-$280 per section.
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 Kirby
Our trucks carry Honeywell zone control components, Aprilaire media air cleaner housings, and Abatement Technologies HEPA filtration equipment - brands that publish specifications customers can verify independently. For Kirby’s aging metal duct systems, we stock Guardsman corrosion-resistant fasteners and mastic-compatible reinforcement tape. Parts availability means no waiting on San Antonio supply-house runs. Most Kirby repairs complete with what’s on the truck.
Common Duct Repair & Sealing Problems We See in Kirby Homes
- Heat-cooked trunk joints. Kirby’s 140°F+ attic temperatures degrade mastic adhesive at metal duct connections. We regularly find separated branch takeoffs that have been leaking conditioned air for years, invisible from the living space until a camera inspection reveals the gap.
- Fiberglass liner shedding. The original internal insulation in 1950s-1970s metal ducts breaks down into respirable fibers. Our Kirby photo records show this as a white, fuzzy coating on the duct interior that migrates through registers and settles on furniture near supply vents.
- Flex duct packed with caliche dust and pollen. Homes near Kirby’s unpaved ranch roads pull fine particulate through return grilles. The corrugations in flex duct trap this material, reducing effective diameter by 20-40% in severe cases. The blower motor overheats. Energy bills climb. The fix is replacement, not cleaning.
- Traffic exhaust masking sealant failure. Properties near Loop 410, IH-10, and FM 78 show dark, greasy register buildup from diesel and gasoline particulates. This coating hides failing mastic underneath. Customers notice the grime first; the underlying leakage costs them more in wasted cooling.
Pricing for Duct Repair & Sealing in Kirby, TX
Here is what duct repair and sealing actually costs in Kirby’s market. These are whole-system prices, agreed in writing before work starts, with no per-vent add-ons or trip-charge surprises.
| Service | Typical Range in Kirby |
|---|---|
| Mastic sealant re-application (full system) | $280-$480 |
| Metal duct repair (trunk section) | $320-$580 |
| Metal duct repair (per branch takeoff) | $180-$340 |
| Flex duct replacement (per run) | $240-$420 |
| Duct insulation replacement (full trunk) | $380-$650 |
| Duct insulation spot repair (per section) | $150-$280 |
| Complete system re-seal and re-insulate | $650-$1,100 |
Three factors move Kirby jobs within these ranges: attic accessibility (some of these 1950s ranches have hatches too small for a technician in full gear), extent of existing damage (a single separated joint versus a trunk that’s dropped multiple branches), and whether the system requires temporary shutdown during JBSA-Randolph peak summer load periods. We assess all three during our free estimate visit and put the exact number in writing before any work begins. Haven Standard Clause 1.
Call (830) 549-6847 for your written estimate. Estimates are free and include a camera inspection of accessible duct runs.
We Also Serve Cities Near Kirby
Our service radius extends to Kirby from the San Antonio office, with regular routes through New Braunfels, Cibolo, Seguin, and Schertz. Crews carry the same equipment roster and follow the same H.A.V.E.N. Standard protocols at every stop. Written pricing. Documented photo records. Background-checked, uniformed technicians identified by name before arrival.
Serving Kirby, TX - Our Local Coverage Area
We’re based in the Kirby 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 Kirby
Every three to four years, with re-sealing at the same interval. The caliche dust from unpaved ranch roads and continuous Ashe juniper pollen loading in Kirby’s return systems pack duct interiors faster than in paved suburban environments. Homes near open land without windbreaks see the shortest intervals. Call (830) 549-6847 and we’ll inspect your current condition with a camera, no charge.
Usually yes, if the sheet metal itself is intact. Kirby’s 1950s-1970s metal trunks are typically 26- or 28-gauge galvanized steel that lasts indefinitely; what fails is the internal fiberglass liner, the external insulation wrap, and the mastic at joints. We repair these three components specifically. Full metal duct replacement in Kirby is rare and typically only needed where physical damage (rodent intrusion, crushing from stored items in attic) has deformed the trunk. A camera inspection shows which category your system falls into. Written estimate follows.
You’re likely near Loop 410, IH-10, or FM 78. Kirby’s perimeter properties pull traffic exhaust particulates - diesel soot, tire rubber, brake dust - into return air systems at concentrations measurably higher than in outlying Bexar County suburbs. This material deposits as a dark, greasy film on registers and masks underlying duct leakage. The cosmetic issue is the symptom; the real problem is often failing mastic sealant hidden beneath the grime. A camera inspection separates surface buildup from structural failure. Call (830) 549-6847 for an assessment.
Yes, particularly for long-term tenants. Kirby’s high military-renter turnover means ductwork routinely goes unaddressed across multiple leases, but the energy cost of leaking attic trunks is continuous and typically borne by the tenant through electric bills. Sealing and insulating a Kirby rental’s metal duct trunk can reduce cooling load by 15-25%, a savings that accrues monthly regardless of lease length. We provide the photo record and written scope to document the work for lease negotiations or move-out disputes. Free estimates mean you can present the landlord with a specific number, not a vague request.
No. Kirby is fully encircled by San Antonio and sits on our regular route grid. Dispatch from the San Antonio office coordinates Kirby appointments with same-day or next-day availability, identical to any Bexar County destination. No mileage surcharge. No extended wait times. The only difference is that our crews arrive knowing the local housing stock: 140°F attics, original metal trunks, and the specific failure modes that produces. Call (830) 549-6847 to schedule.
Ready to see what’s actually inside your ducts? Call CleanRun Air Duct Cleaning New Braunfels at (830) 549-6847 for a free written estimate. We’ll run a camera, show you the photo record, and put a price in writing before any work starts. Every job backed by the 365-Day Done Right Promise and the full H.A.V.E.N. Standard.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning New Braunfels, serving Kirby and surrounding Bexar County communities since 2013.