Fast, Reliable Duct Repair & Sealing Across Floresville
Duct repair and sealing in Floresville typically runs $180-$650 depending on whether you’re patching a single flex duct run or resealing an entire metal trunk system, and most of our Duct Repair & Sealing jobs are completed in a single visit. We’re familiar with Floresville’s mix of historic downtown homes and the ranch-style and manufactured housing built during the 2000s-2010s growth boom, and we make the drive from our San Antonio base with background-checked, uniformed technicians who know what South Texas heat and Wilson County field dust do to ductwork. If you’re seeing weak airflow, hot rooms, or that tan grit collecting around your return grilles, call us at (866) 347-2063. We’ll show you exactly what’s wrong with a camera inspection before we quote a single dollar.
Why Bellows Air Duct & Vent Co. of San Antonio Is Floresville’s Preferred Duct Repair & Sealing Company
We’ve been serving South Texas homeowners for over 42 years, and Floresville has been part of our route since the early 1990s when bedroom-community growth started bringing San Antonio commuters down Highway 181. Our technicians know the difference between a 1920s downtown cottage with original metal ducting and a 2008 ranch home with flex runs sagging in the attic - and we repair both.
Our reputation here is built on showing up when we say we will and leaving camera proof of the work. We answer calls with a live person 24 hours a day, not voicemail or an app. That matters in Floresville, where many of our customers have owned the same home for twenty-plus years and remember when a contractor’s word meant something. We also offer Floresville Dryer Vent Cleaning for homeowners who want the same reliability across every vent system.
We back every duct repair with our 90-Day Done Right Promise in writing. If it’s not right, we return at no charge. No paperwork, no arguing. That’s been our policy since 2012.
Our Duct Repair & Sealing Services in Floresville
Flex Duct Repair
Floresville’s 2000s-2010s building wave leaned heavily on flexible duct systems, and South Texas heat has not been kind to them. We regularly find sagging runs, crushed sections, and complete detachments near attic hatches in homes off 10th Street and around the 78114 zip code. A typical flex duct repair in Floresville runs $220-$380 per run, including reconnection, support reinforcement, and sealing. We use professional-grade zip ties and metal-backed tape rated for attic temperatures before sealing with mastic.
Mastic Sealant Application
Metal duct joints in Floresville homes face a specific enemy: caliche dust erodes mastic bonds during high-velocity cooling cycles. We’ve developed a prep protocol for Wilson County conditions - aggressive surface cleaning, fiberglass mesh reinforcement at joints, and two-coat mastic application that holds against the abrasive load. Mastic resealing of a standard metal trunk system in Floresville typically costs $280-$450. We warranty our sealant work against separation for 90 days, and we’ll show you the before-and-after with our camera.
Air Leak Repair
That gritty tan-to-white paste our techs find packed into south- and west-facing return grilles? It’s caliche silt mixed with peanut hull dust, and it hides leaks you’d never spot from the living room. We pressurize the system, locate leaks with smoke testing, and repair punctures or separations with metal patches, reinforced tape, and sealant. Air leak repair in Floresville homes starts around $180 for localized fixes and runs to $650 for whole-system sealing. Most jobs finish in one visit.
Duct Insulation
Attic ducts in Floresville bake from April through October. Damaged or missing insulation forces your AC to work harder and longer. We replace insulation on flex and metal runs with materials rated for South Texas temperature extremes, typically $150-$300 per run depending on accessibility. Proper insulation pays for itself in reduced cooling load during Floresville’s six-month cooling season.
Metal Duct Repair
Older homes near the historic downtown core still run galvanized steel trunks from the 1950s-1970s. We patch rust holes, reinforce weak spans, and reconnect separated sections. Metal duct repair in Floresville’s historic housing stock runs $250-$520 depending on access and extent of corrosion. When repair is no longer economical, we’ll tell you straight and quote a replacement.
What happens when you call
- 1
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.
Trusted Brands We Service in Floresville
We carry Rotobrush agitation tools and Nikro HEPA vacuum systems on every truck, and we stock Honeywell and Aprilaire replacement components for common Floresville installations. That means no waiting on parts for standard repairs. Our technicians are trained on the same equipment serious Floresville HVAC Cleaning contractors specify, not discount tools that leave debris behind. For Floresville homeowners, this translates to faster turnaround and repairs that hold up to the agricultural dust load this region throws at them.
Common Duct Repair & Sealing Problems We See in Floresville Homes
- Flex duct sagging and detachment in 2000s-2010s homes. South Texas attic heat softens flex duct supports, creating gaps near attic hatches that bypass filtered air and pull in crawlspace caliche dust. We find this pattern repeatedly in ranch-style homes off B Street and in the newer subdivisions east of downtown.
- Mastic seal failure on metal joints in caliche-rich soil zones. The fine white calcium carbonate dust stirred by farm equipment and dry southwest winds erodes duct sealant bonds during high-velocity cooling cycles. We remove failed material and reseal with reinforced, two-coat application.
- Return grille clogging on south- and west-facing walls. The tan-to-white caliche and peanut-hull mixture packs into grilles, restricting airflow and concealing unrepaired punctures. Cleaning reveals the real damage underneath.
- Disconnected trunk lines in manufactured homes. Transport and settling create gaps at connection points. We repaired a severely disconnected flex duct in a 2005 manufactured home on 6th Street, where sagging from South Texas heat had created a 4-inch gap, pulling in caliche dust from the crawlspace. Using mastic sealant and new zip ties, we restored the connection and sealed the entire trunk to Staunton specifications.
Pricing for Duct Repair & Sealing in Floresville, TX
| Service | Typical Range in Floresville |
|---|---|
| Single flex duct repair/reconnection | $220 - $380 |
| Mastic sealant reapplication (metal trunk) | $280 - $450 |
| Air leak detection and localized repair | $180 - $320 |
| Whole-system air sealing | $450 - $650 |
| Duct insulation replacement (per run) | $150 - $300 |
| Metal duct repair (historic homes) | $250 - $520 |
These ranges reflect Floresville’s market - labor rates here run slightly below San Antonio’s, but agricultural dust conditions often mean more extensive cleaning and prep than suburban jobs require. We disclose every cost before lifting a tool. No bait coupons, no price changes at the door. Our $50 Off Any Repair Over $250 applies to ductwork, and we offer a Free Second Opinion on Any Written Estimate if you’ve already been quoted elsewhere. Call (866) 347-2063 for an exact figure - estimates are free.
We Also Serve Cities Near Floresville
Our technicians regularly run to Pleasanton, Kirby, San Antonio, and Converse from our Floresville calls. If you’re in Wilson County or the near-south San Antonio metro, the same live-answer phone line and same-day scheduling apply. We also offer our Duct Repair & Sealing in Floresville neighbors our standing $89 Seasonal Tune-Up and permanent 5% Senior and Veteran discount.
Serving Floresville, TX - Our Local Coverage Area
We’re based in the Floresville 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 Floresville
Every two to three years, or immediately if you notice hot rooms, weak airflow, or grit around grilles. The flex duct systems common in 2000s-2010s Floresville construction degrade faster in South Texas attics than in cooler climates, and harvest-season dust accelerates wear. We include duct condition in our $89 Seasonal Tune-Up. Call (866) 347-2063 to schedule.
Yes, when properly applied with surface prep and reinforcement. Standard single-coat mastic fails in Floresville because caliche dust erodes the bond during high-velocity AC cycles. Our protocol uses aggressive cleaning, fiberglass mesh at stress joints, and two-coat application. We’ve tracked our repairs through multiple harvest seasons, and the reinforced seals hold. Call for a camera inspection if you suspect joint failure.
That’s caliche silt mixed with peanut hull dust, a signature of Floresville’s agricultural environment. Dry southwest winds drive this mixture against south and west walls, where return grilles act as intake filters. The paste restricts airflow and hides grille damage or duct punctures. We remove the buildup and inspect behind it with a camera - often finding leaks that explain uneven cooling. Call (866) 347-2063 for an inspection.
Repair if the damage is localized sagging, disconnection, or single-run crushing - typically $220-$380. Replace if you see widespread brittle liner, multiple punctures, or contamination that can’t be cleaned. In Floresville’s 2000s-era ranch homes, we often find repairable damage limited to attic hatch zones and crawlspace entries. We’ll show you the camera footage and quote both options honestly. Our 90-Day Done Right Promise covers either path.
We use Rotobrush agitation tools as part of our Air Duct Cleaning - Floresville process, especially on flex duct interiors where peanut-hull and caliche paste resists standard tools. The brush system loosens adhered debris before we seal or repair, ensuring mastic and tape bond to clean surfaces. We pair Rotobrush equipment with Nikro HEPA vacuums for containment. Camera verification confirms the surface is ready before we seal.
Ready to fix your ductwork? Call Bellows Air Duct & Vent Co. of San Antonio at (866) 347-2063 for a free estimate in Floresville. We’ll answer live, schedule promptly, and show you exactly what needs doing before you spend a dollar.
Written by Wade Kellerman, Owner at Bellows Air Duct & Vent Co. of San Antonio, serving Floresville since 2012.