Fast, Reliable Duct Repair & Sealing Across Converse
Duct repair and sealing in Converse typically runs $180-$650 depending on whether you’re patching a flex-duct split or replacing degraded fiberglass duct board, and most of our Duct Repair & Sealing jobs in the 78109 area finish in a single visit. We’re familiar with the housing stock here - the 1970s-1990s slab-on-grade tract homes built for Randolph AFB families, with attic-mounted air handlers that bake in summer temperatures above 140°F. If your vents are blowing weak, your bills are climbing, or you’re smelling must from the attic, call (844) 685-6342. We’ll answer live, day or night.
Why Bellows Air Duct & Vent Co. Is Converse’s Preferred Duct Repair & Sealing Company
We’ve been serving Texas homeowners since 1984, and Converse has been part of our route for decades. Ray Castillo built this company on the idea that a homeowner should never have to argue about whether a job was done right - our 90-Day Done Right Promise means we come back at no charge, no paperwork, if something isn’t square.
Our technicians know the local failure patterns. They’ve pulled returns clogged with caliche limestone dust and cedar pollen mats in rental homes near Gibbs Sprawl Road. They’ve replaced flex duct that’s crumbled from attic heat in the Fox Run and Meadow Brook subdivisions. They know the difference between a system that’s actually undersized and one that’s simply choked with sediment.
Calls are answered by a live person 24 hours a day - not a voicemail tree, not an app. Most Converse appointments are scheduled same-day or next-day. Our background-checked, uniformed crews arrive when we say they will, with upfront pricing disclosed before any tool is lifted. The number on the phone is the number on the invoice.
Our Duct Repair & Sealing Services in Converse
Flex Duct Repair
Flex duct is the weak link in most Converse attics. The bulk of local housing used insulated flex runs from the air handler to ceiling registers, and that insulation breaks down fast when attic temperatures exceed 140°F for months each summer. We recently repaired a flex-duct split in a 1980s tract home on Gibbs Sprawl Road near Randolph. The homeowner, a military family on PCS orders, had noticed rising bills. Our crew found the flex duct’s insulation had crumbled from heat exposure, and the inner liner was clogged with caliche dust and cedar pollen. We replaced a 20-foot section with new insulated flex duct and sealed all joints with mastic. The job took three hours. Their airflow improved immediately.
Typical flex duct repair in Converse runs $220-$480 for section replacement, including mastic sealing of all connections.
Duct Sealing
Sealing is often the most cost-effective improvement for Converse homes. Attic ductwork develops gaps at joints and register boots over years of thermal expansion and contraction. In the humid months, those gaps pull hot attic air into the system. In winter, they leak heated air into spaces no one lives in. We seal with mastic - a brush-applied compound that remains flexible and won’t crack like tape - and we verify with before-and-after camera inspection. For rental properties near Randolph with chronically neglected systems, duct sealing can recover 20-30% of lost airflow without replacing anything.
Duct sealing for a typical Converse home runs $350-$650 for full-system treatment.
Metal Duct Repair
Some 1980s Converse homes used galvanized metal trunk lines with flex-duct branches. Metal lasts longer but rusts at seams where condensation collects, and vibration from the air handler can loosen connections. We repair rusted sections, reseal seams with mastic, and reinforce sagging supports. Metal ductwork can be worth preserving when it’s structurally sound - we’ll tell you honestly when repair makes sense and when replacement is the square deal.
Metal duct repair in Converse typically runs $180-$420 per section.
Duct Insulation
Even intact ductwork loses efficiency without proper insulation. In Converse’s extreme attic heat, uninsulated or poorly insulated ducts act like radiators, warming your cooled air before it reaches the room. We install new insulation wraps or replace degraded flex duct with higher-R-value product. This is particularly important for homes in the northeastern corridor toward Randolph, where flat terrain and open lots offer no shade to reduce attic temperatures.
Duct insulation work in Converse runs $280-$580 depending on linear footage and attic accessibility.
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 Converse
We carry Rotobrush inspection systems and Nikro HEPA vacuums on every truck, and we stock mastic sealant and insulation materials from Abatement Technologies for fast turnaround on Converse repairs. These are the same brands serious HVAC contractors specify - not discount hardware-store alternatives. Our parts inventory covers the common flex-duct diameters and metal fittings found in local 1970s-1990s housing, so we’re not ordering parts while your system sits open. Most Converse jobs are completed in one visit.
Common Duct Repair & Sealing Problems We See in Converse Homes
- Fiberglass duct board shedding liner material. Homes from the 1970s-1990s frequently used fiberglass duct board for return-air plenums. Over decades, the interior lining breaks down and blows into living spaces as fine particulate. This cannot be repaired - the duct board must be replaced with modern metal or flex-duct construction.
- Flex-duct insulation degraded by extreme attic heat. Converse attic temperatures regularly exceed 140°F in summer. The foil-and-fiberglass insulation on flex duct crumbles, exposing the inner liner to temperature extremes and causing condensation that breeds mold. We see this failure pattern every 3-5 years in unconditioned attics.
- Caliche dust and cedar pollen blocking returns. The San Antonio region’s mountain cedar season produces some of North America’s highest pollen concentrations, and Converse’s flat, open northeastern corridor funnels it straight into outdoor intakes. Mixed with fine caliche limestone dust from unpaved lots and construction sites, it forms a dense sediment cake that acts like insulation inside ducts. Homeowners - especially incoming military families - often assume their system is undersized when it’s simply blocked.
- Joint separation from thermal cycling and vibration. Decades of summer expansion and winter contraction loosen connections between duct sections, register boots, and plenums. The leaks are invisible in dark attics but show up as uneven room temperatures and rising utility bills.
Pricing for Duct Repair & Sealing in Converse, TX
| Service | Typical Range in Converse |
|---|---|
| Flex duct section repair/replacement | $220 - $480 |
| Duct sealing (full system, mastic) | $350 - $650 |
| Metal duct repair (per section) | $180 - $420 |
| Duct insulation replacement | $280 - $580 |
| Fiberglass duct board replacement | $450 - $850 |
These are honest ranges for the Converse market - what we’ve actually quoted on jobs in the 78109 ZIP code. Final cost depends on attic accessibility, linear footage, and whether we find additional issues during our camera inspection. We disclose the full price before starting work. No bait coupons, no changes at the door. We also offer $50 off any repair over $250, and a free second opinion on any written estimate you’ve received. Senior and veteran discounts of 5% apply permanently.
Call (844) 685-6342 for a free estimate. We’ll inspect with camera, explain what we found, and give you a number you can count on.
We Also Serve Cities Near Converse
Our crews regularly work in Universal City, Live Oak, Schertz, and Cibolo - the same Randolph AFB corridor, the same housing stock, the same duct failure patterns. If you’re in these areas and need Duct Repair & Sealing in Converse or surrounding communities, the same live-answer phone line and same-day scheduling applies.
Serving Converse, TX - Our Local Coverage Area
We’re based in the Converse 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 Converse
Look for a white, fuzzy residue on your vent covers or a fine dust that resets quickly after cleaning. Fiberglass duct board was common in 1970s-1990s Converse construction, and its interior liner breaks down over time. We confirm with camera inspection - if the interior surface is shedding, replacement is the only permanent fix. Call (844) 685-6342 for a free inspection.
Yes, duct sealing often reduces utility bills by 20-30% in rental properties with chronically neglected systems. Military turnover means many Converse rentals have never had ductwork inspected - leaks at joints and boots waste conditioned air continuously. We seal with mastic and verify with camera. Estimates are free; call (844) 685-6342.
Your returns are likely pulling in caliche dust and cedar pollen through gaps in the ductwork, bypassing the filter entirely. Converse’s flat, open terrain funnels high concentrations of both into attic and crawlspace duct runs. Sealing those gaps stops the bypass, and cleaning removes the existing sediment. Call (844) 685-6342 - we’ll show you on camera exactly where the leaks are.
Metal ducts last longer and resist the heat degradation that ruins flex duct in Converse attics, but they rust at seams and can be harder to seal properly. We evaluate each system individually - sometimes metal trunk lines are worth preserving with spot repair and resealing, sometimes replacement with modern flex is the better long-term value. Our camera inspection gives you the facts to decide. Free estimates at (844) 685-6342.
We recommend inspection every 3-5 years for Converse homes, with sealing as needed when leaks appear. The combination of mountain cedar pollen, caliche dust, and extreme attic heat accelerates wear compared to milder climates. Military rental properties with high tenant turnover may need more frequent attention. Our $89 Seasonal Tune-Up includes a basic duct inspection - call (844) 685-6342 to schedule.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Converse and surrounding communities since 1984.