Fast, Reliable Duct Repair & Sealing Across Converse
Duct repair and sealing in Converse, TX typically costs $280-$650 for most residential jobs, with same-day service available throughout the 78109 ZIP code. We drive out to Converse from our Houston office daily, and most repairs are finished in a single visit. Call (866) 347-2063 for a free estimate and we’ll give you an honest price before a single tool is lifted.
We’ve been working in Converse homes since the 1980s, back when FM 1516 was still a two-lane road and the subdivisions near JBSA-Randolph were fresh construction. We know the housing stock here - the late-1970s tract homes with original flex duct runs sagging in unconditioned attics, the 1990s builds where galvanized take-offs were never properly sealed, and the 2000s cookie-cutter boom where builder-grade ductwork went in fast and was never touched again. That local knowledge matters when we’re diagnosing why your bedroom never cools or why your energy bill keeps climbing.
Why Bellows Air Duct & Vent Co. of Texas Is Converse’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in Converse on showing up when we say and standing behind the work. Our Duct Repair & Sealing team has handled everything from minor leak patches in Live Oak Ridge rentals to full flex duct replacements in the older subdivisions off Gibbs Sprawl Road.
Converse customers call us because we answer the phone - a live person, 24 hours a day, not a voicemail tree. Our technicians are background-checked and uniformed, and every job gets camera-inspected before and after so you see what we see. No claims without proof.
Our 90-Day Done Right Promise applies to every Converse job. If it’s not right, we make it right - no paperwork, no arguing. That’s been our standard since 1984, and it’s why homeowners who’ve been burned by low-bid contractors come back to us when the next issue pops up.
We also know the local conditions that break ductwork here. The caliche limestone dust that blows through Converse year-round doesn’t just dirty your vents - it infiltrates every unsealed joint, grinding away at mastic and tape until your attic is pulling 0.6 in. W.C. of conditioned air straight outside. Combine that with mountain cedar season from December through February, and you’ve got a duct system that’s working against you eight or nine months a year.
Our Duct Repair & Sealing Services in Converse
Duct Sealing
Most Converse homes lose 20-30% of conditioned air through leaks in the duct system. We seal with mastic sealant and foil tape rated for Texas attic temperatures, not the cheap tape that turns to powder after two summers. In Converse, we pay special attention to the take-off connections at the plenum - that’s where caliche dust does the most damage to seals, and where we most often find the gaps that spike your energy bill.
Flex Duct Repair
The original flex duct runs in Converse’s 1970s and 1980s homes weren’t built to last forty years. We’ve replaced collapsed sections in attics over Schertz Road where the insulation has degraded and the inner liner has torn, creating debris traps that collect everything the return pulls in. Partial repair works when the damage is isolated; full replacement makes sense when the entire run has sagged or the insulation is falling away.
Metal Duct Repair
Galvanized metal ductwork in older Converse homes develops rust at seams and cracks at stress points. We patch with matching metal and seal with mastic, or replace short sections when the damage is too extensive. Metal work costs more than flex, but it lasts - and in some of these older systems, it’s worth preserving what’s solid rather than tearing out everything.
Duct Insulation
Unconditioned attics in Converse hit 140°F in July. When your flex duct insulation has compressed or torn, you’re paying to cool air that heats back up before it reaches the vent. We re-insulate with R-6 or R-8 wrap, depending on the application, and we always verify with our camera that the insulation is continuous - no gaps, no compression at truss crossings.
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.
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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 parts and materials from Rotobrush, Nikro, and Honeywell - the same brands serious HVAC contractors specify when they’re building systems meant to last. For Converse customers, that means faster turnaround. We don’t have to order mastic or foil tape or replacement flex duct; it’s on the truck when we pull up. That matters when your system is down in August and the attic is a furnace, or when cedar season has your allergies flaring and you need the sealed system working now, not next week.
Common Duct Repair & Sealing Problems We See in Converse Homes
- Original flex duct runs in unconditioned attics sag and collect debris, making partial sealing ineffective without full re-insulation. The 1,200-1,800 sq ft tract homes that make up most of Converse’s housing stock have flex duct that was never designed for four decades of 140°F summers. We find runs that have sagged below the insulation line, creating low spots where dust and pollen compact until airflow is choked.
- Landlords skip duct maintenance between tenants, so caliche dust and cedar pollen accumulate into dense, solid-like clumps that require manual duct cleaning before sealing can bond. In the rental corridors near JBSA-Randolph, it’s common to pull a register and find material that’s been packing in since the last PCS move - three or four tenant rotations ago. Sealing over that contamination is a waste of money; we clean first, then seal.
- Builder-grade ductwork from the 2000s boom often has unsealed take-offs and disconnected boots that allow attic air to cycle into the living space year-round. The rapid subdivisions that went up in the 2000s were built fast, and the ductwork shows it. We regularly find boots that have pulled completely free of the ceiling drywall, dumping attic air - and everything in it - straight into the room.
- Mountain cedar pollen loads air returns during December-February and accumulates in ductwork in ways that aggravate allergies long after the season ends. The northeast San Antonio corridor sits in the worst of the Ashe juniper zone. That ultrafine pollen doesn’t just pass through; it sticks to the oils and moisture in ductwork, creating a reservoir that releases with every system cycle until it’s physically removed.
Pricing for Duct Repair & Sealing in Converse, TX
We’re upfront about numbers because nobody likes a surprise on the invoice. Here’s what duct repair and sealing costs in the Converse market:
| Service | Typical Range in Converse |
|---|---|
| Single leak seal (mastic + foil tape) | $180-$280 |
| Flex duct section repair/replacement (per run) | $220-$380 |
| Full duct sealing (average 1,500 sq ft home) | $450-$650 |
| Metal duct patch or section replacement | $320-$520 |
| Duct re-insulation (per run) | $180-$340 |
| Return plenum repair or replacement | $380-$620 |
What moves you within these ranges: accessibility (crawl space vs. walkable attic), extent of contamination that needs cleaning before sealing, and whether we’re matching existing materials or upgrading. Every estimate is free, and we show you the camera footage so you understand what we’re quoting before you decide. We also honor our standing offers: $50 off any repair over $250, free second opinion on any written estimate, and a permanent 5% senior and veteran discount.
We Also Serve Cities Near Converse
Our service area covers the full northeast San Antonio corridor. We regularly run Duct Repair & Sealing in Converse and the surrounding communities of Windcrest, Universal City, Kirby, and Live Oak. Same trucks, same technicians, same upfront pricing - whether you’re off FM 1516 or near Windcrest’s main drag.
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
If the flex duct insulation is crumbling, the inner liner is torn, or the run has sagged more than a few inches below the support strap, replacement is usually the better investment. Repair works for isolated damage - a single tear, a disconnected boot, a failed connection at the plenum. We camera-inspect every system and show you exactly what we’re seeing before you decide. Call (866) 347-2063 for a free estimate - we work with plenty of Converse landlords who need straight answers, not upsells.
Sealing alone won’t stop pollen that’s already inside your ductwork, but it will prevent new attic air - and the pollen it carries - from entering through leaks. For existing contamination, we recommend duct cleaning before sealing. In Converse, where mountain cedar season is severe, the combination of thorough cleaning and proper sealing typically reduces indoor pollen loads by 60-80%. The seal holds year after year if it’s done right with mastic, not cheap tape.
We remove it mechanically with Rotobrush agitation and high-powered vacuum extraction - no chemicals that leave residue, no shortcuts that leave material behind. In Converse, where this compressed caliche is common near JBSA-Randolph rentals, we’ve developed a specific protocol: brush agitation to break the compaction, followed by negative-air vacuuming until the duct is clean metal or liner. Sealing only happens after we verify with the camera that the surface is clean enough for mastic to bond. Skipping this step is why some “sealing” jobs fail in six months.
Most plenum leaks in Converse’s older housing stock can be patched with metal and mastic if the corrosion or damage is localized. We replace the plenum when the metal is extensively rusted, when previous patches have compromised structural integrity, or when the original design is so inefficient that repair doesn’t solve the pressure drop. A camera inspection tells the story - we’ll show you the difference and quote both options if both are viable. Our $50 off repair over $250 applies to plenum work too.
Probably. A musty smell after rain usually means attic air - and the moisture it’s carrying - is being pulled into the return through a leak in the plenum or a disconnected boot. In Converse, where summer humidity spikes and winter rains can find roof leaks, this is a common call. We find the leak with smoke testing or camera inspection, seal it properly, and verify the fix. Left unaddressed, that moisture breeds mold in the ductwork. Call (866) 347-2063 and we’ll get out there - same-day service is often available in the 78109 area.
Ready to stop losing conditioned air to your attic? Call Bellows Air Duct & Vent Co. of Texas at (866) 347-2063 for a free estimate on duct repair and sealing in Converse. We’ll show you what we find, give you an honest price before we start, and stand behind the work with our 90-Day Done Right Promise - in writing, no arguing, the way we’ve done it since 1984.
Written by Wade Kellerman, Owner at Bellows Air Duct & Vent Co. of Texas, serving Converse since 1984.