Fast, Reliable Duct Repair & Sealing Across Cibolo
Duct repair and sealing in Cibolo typically costs between $180 and $650 depending on the scope, with most standard sealing jobs running $280-$450 and completed in a single visit. If your home was built during Cibolo’s rapid growth since 2000, there’s a strong chance your ductwork carries construction debris that should have been cleaned out before you moved in. We’re Bellows Air Duct & Vent Co. of Texas, and we’ve been driving out to Cibolo from our Houston base for years to fix exactly that problem. Our technicians know the 78108 ZIP code well, from the newer subdivisions near Cibolo Valley Ranch to the established streets around Schertz-Cibolo-Universal City ISD. Call (866) 347-2063 and you’ll reach a live person, any hour, who can get you scheduled.
Why Bellows Air Duct & Vent Co. of Texas Is Cibolo’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in Cibolo the old way: showing up when we say, doing what we promised, and standing behind it. Our Duct Repair & Sealing team has worked in enough Cibolo homes to recognize the patterns. Production builders here worked fast during the boom years, and that speed shows up in ductwork that was never properly sealed, flex runs that were crushed during framing, and supply boots left open while drywall crews finished their work.
Homeowners in Cibolo call us back because we don’t bait-and-switch. The price we quote on the phone is the price on the invoice. Every job gets camera-inspected before and after, so you see what we see. Our 90-Day Done Right Promise means if something isn’t right, we return at no charge with no paperwork required. Wade Kellerman, who leads this company, started Bellows in 1984 on the principle that a square deal beats a low coupon every time. That hasn’t changed.
Our response time to Cibolo is typically same-day or next-day for standard calls, and we carry the parts and equipment to complete most repairs in one trip. Background-checked, uniformed technicians. Upfront pricing disclosed before a single tool is lifted. That’s how we’ve operated for over 42 years.
Our Duct Repair & Sealing Services in Cibolo
Duct Sealing
Leaky ductwork in Cibolo homes wastes an average of 20-30% of conditioned air, which means your heat pump or gas furnace works harder and your utility bills climb. We seal supply and return plenums, junction boxes, and branch connections using mastic sealant and professional-grade tapes rated for Texas temperature swings. In Cibolo’s newer subdivisions, we find the worst leaks at the first-branch flex connections where builder crews rushed the final connections. Our sealing work is camera-verified, and we test static pressure before and after to prove the improvement.
Flex Duct Repair
Flex duct is the standard in Cibolo’s production-built homes, and it’s vulnerable. Improper support during framing creates sagging and kinks that block airflow. We’ve replaced crushed flex runs in attics across Cibolo Valley Ranch, The Reserve at Heritage, and other master-planned communities where the duct was pinched between trusses or pressed against insulation. A typical flex duct section replacement in Cibolo runs $220-$380 including materials and labor. We use insulated flex rated for local climate conditions and support it properly so the problem doesn’t repeat.
Metal Duct Repair
Some Cibolo homes, particularly earlier builds and custom construction, use galvanized steel trunk lines with flex branches. Metal ducts develop seam separations, corrosion at condensate collection points, and damage from rodents or maintenance activity. We patch, replace sections, or re-line metal ductwork as needed. Metal repair tends to run higher than flex work, typically $340-$650 depending on accessibility and extent. We always inspect with a camera first so you’re not paying for replacement when sealing would solve it.
Duct Insulation Repair
Cibolo’s attic temperatures peak hard in summer, and degraded duct insulation means cooled air warms before it reaches your vents. We see this especially in homes where original insulation has compressed, torn, or been disturbed by subsequent HVAC service. Our insulation repair restores thermal barrier integrity using materials from brands like Honeywell and Aprilaire, specified for the temperature extremes of Central Texas attics. Proper insulation repair can drop supply air temperature loss by 8-12 degrees in a hot attic.
Mastic Sealant Application
For joints and connections that need more than tape, we brush or spray mastic sealant, a fiber-reinforced compound that cures to a permanent, flexible seal. This is our standard for plenum connections and any joint under positive pressure. Mastic outlasts foil tape and doesn’t degrade in Cibolo’s heat the way cheaper products do. We include mastic work in our standard sealing package when it’s warranted, with no surprise add-ons.
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.
Trusted Brands We Service in Cibolo
We specify equipment from Rotobrush, Honeywell, and Aprilaire, the same brands serious HVAC contractors use when they’re installing systems meant to last. Our Cibolo customers benefit from our parts inventory and supplier relationships, which means we don’t order-and-wait for common repairs. Rotobrush equipment powers our camera inspections and mechanical cleaning when needed. Honeywell and Aprilaire filtration and insulation products integrate with the systems we repair. We stock flex duct, mastic, collars, and boots sized for the standard residential systems found across Cibolo’s subdivisions, so most jobs finish in one visit.
Common Duct Repair & Sealing Problems We See in Cibolo Homes
- Production-built flex ducts improperly supported or kinked during framing. In Cibolo’s boom-era subdivisions, framers and HVAC crews often worked overlapping schedules, and flex runs got pinched between truss chords or left draped over rafters without proper strapping. The result is restricted airflow, noisy operation, and premature equipment wear. We replace the damaged section and support it correctly.
- Open supply boots during construction allowed drywall compound dust to settle deep in duct linings. This is the signature Cibolo problem. Builders left boots uncovered during drywall and insulation phases, and that fine dust has been recirculating since move-in. Sealing the boots properly is step one; cleaning the contamination out is the necessary follow-up.
- Fine caliche and limestone particulate from nearby undeveloped lots clogs return-air grilles and embeds in duct insulation. Cibolo sits at the edge of the Blackland Prairie, and active construction nearby keeps particulate airborne. Return grilles act as collection points, and over time this abrasive dust degrades duct liner and reduces system efficiency. We see this in homes near still-developing phases of master-planned communities.
- Ashe juniper pollen accumulation during extended HVAC run times. Cibolo’s “cedar fever” season from December through February drives residents to run heating systems continuously, and that heavy pollen load coats duct interiors. Leaky ducts pull even more unfiltered air in, compounding the problem. Proper sealing reduces infiltration and protects indoor air quality.
Pricing for Duct Repair & Sealing in Cibolo, TX
We’re straightforward about what duct repair and sealing costs in the Cibolo market because we don’t believe in bait pricing. Here’s what we typically see:
- Standard duct sealing (single system, up to 12 joints/connections): $280-$450
- Flex duct section replacement: $220-$380 per run
- Metal duct patch or section repair: $340-$650
- Duct insulation repair/replacement: $180-$320 per section
- Mastic sealant application (extensive, whole plenum): $150-$280 add-on to sealing
- Full system evaluation with camera inspection: $89 (credited toward repair if you proceed)
What moves the number: accessibility (crawl space vs. walk-up attic), extent of contamination requiring cleaning before sealing, and whether we find multiple failure points that need combined repair. We disclose the full price before we start. No changes at the door. Our $50 Off Any Repair Over $250 applies to most jobs, and we honor a permanent 5% Senior and Veteran discount. Call (866) 347-2063 for a free estimate, exact to your home.
We Also Serve Cities Near Cibolo
Our service radius covers the full I-35 Northeast Corridor growth area. We regularly run calls to Cibolo‘s neighboring communities including Schertz, Selma, Universal City, and Converse. Same technicians, same equipment, same upfront pricing policy. If you’re in the 78108 ZIP or nearby and your ducts need attention, we’re already driving your direction.
Serving Cibolo, TX - Our Local Coverage Area
We’re based in the Cibolo 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 Cibolo
Yes, almost certainly. Production builders in Cibolo’s rapid-growth phase routinely left flex-duct runs and supply boots open during drywall, insulation, and finishing work, embedding construction debris that was never cleaned before occupancy. We find drywall compound dust, cellulose fibers, and saw debris in homes across Cibolo’s newer subdivisions. Our camera inspection will show you exactly what’s in there, and we can clean and seal the system properly. Call (866) 347-2063 for a free estimate.
If you have hot or cold spots, weak airflow at specific vents, or rattling sounds when the system runs, you likely have physical damage to flex duct that sealing alone won’t fix. Sealing addresses leaks at joints and connections; repair replaces crushed, torn, or sagging duct sections. We camera-inspect every Cibolo job to determine which approach is needed, and we’ll show you the footage before quoting. Our Free Second Opinion on Any Written Estimate means you can verify another contractor’s diagnosis at no charge.
Proper duct sealing significantly reduces pollen infiltration by closing the gaps and leaks that pull unfiltered attic and wall cavity air into your system. However, sealing doesn’t remove pollen already inside the ducts. For Cibolo’s intense Ashe juniper season from December through February, we typically recommend sealing combined with mechanical cleaning to address both the infiltration path and existing accumulation. Our $89 Seasonal Tune-Up includes evaluation of your duct system’s integrity before pollen season peaks.
Uneven cooling is one of the most common symptoms we diagnose in Cibolo Valley Ranch and similar master-planned communities. Leaky supply ducts lose conditioned air into the attic, while leaky returns pull hot attic air into the system, starving distant rooms of adequate flow. The production-build speed in this area means first-branch connections and plenum joints were often inadequately sealed from day one. We pressure-test and camera-inspect to locate the specific leaks, then seal with mastic and tape rated for your system’s operating pressures. Most Cibolo Valley Ranch homes we service show 15-25% airflow improvement after sealing.
In Cibolo’s climate, yes. Attic temperatures regularly exceed 130°F in summer, and degraded or compressed insulation on attic ductwork can raise supply air temperature by 10 degrees or more before it reaches your vents. That forces your heat pump or gas furnace to run longer and harder. We inspect insulation condition during every duct evaluation and repair or replace sections where the thermal barrier has failed. This is especially important in Cibolo’s newer homes where original insulation was minimally specified to meet code.
Written by Wade Kellerman, Owner at Bellows Air Duct & Vent Co. of Texas, serving Cibolo and surrounding communities since 1984.