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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After
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Before
AfterFast, Reliable Duct Repair & Sealing Across Bulverde
Duct repair and sealing in Bulverde, Texas typically costs between $350 and $1,200 depending on whether you’re addressing isolated collar leaks or a full system reseal, and most jobs are completed in a single visit with a written price agreed before any work starts. If your HVAC runs constantly, rooms stay uneven, or your energy bills spike through summer, the culprit is usually leaking supply or return runs in your attic, not your compressor. Call (830) 402-5110 for a free written estimate - every quote includes a documented photo record of what we find.
We’ve worked the Bulverde market since 2013, from the established homes near Bulverde Road to the newer subdivisions off FM 1863 and the Spring Branch corridor along Hwy 46. Our crews are dispatched from the Dallas-Fort Worth office and serve Bulverde locally, which means we understand the specific failure modes this Hill Country terrain creates: cedar pollen loading, 140°F attic summers, and builder-era debris that never got removed after the certificate of occupancy.
Why CleanRun Air Duct Cleaning Schertz Is Bulverde’s Preferred Duct Repair & Sealing Company
Bulverde homeowners don’t buy ductwork services from a brochure. They buy from a company that can show them what was actually inside their plenum - the main distribution box attached to your air handler - before suggesting a single repair. Our Duct Repair & Sealing team photographs every duct run, before and after, as a standard deliverable on every job. No manager approval needed. No extra charge.
Our reputation in Bulverde is built on documented evidence, not years-in-business claims. The 365-Day Done Right Promise is written on every invoice, not just stated in marketing copy. If the seal fails, the mastic cracks, or a collar we secured starts leaking again, we make it right. Haven Standard Clause 1 requires a written price before any work starts - every time, no exceptions. Haven Standard Clause 3, Verified Crews, means our technicians are background-checked, uniformed, and identified by name before they arrive at your Bulverde property.
We also offer a Free Second Opinion on any written estimate from a competitor. Bring us another company’s quote; we’ll put our number next to it in writing. No pressure, no obligation.
Our Duct Repair & Sealing Services in Bulverde
Duct Sealing with Mastic Sealant
Mastic is a thick, fiber-reinforced sealant applied to joints, collars, and boots that tape alone cannot hold. In Bulverde’s climate, standard foil tape degrades in attic heat within two to three seasons. We use professional-grade mastic rated for the temperature swings of unconditioned Hill Country attics, applied after negative-pressure extraction removes existing debris. A typical mastic sealing job for a 2,500-3,500 sq ft Bulverde home runs $450-$850.
Flex Duct Repair
Flex duct - the insulated flexible tubing routed through most Bulverde attics - uses a plastic liner that becomes brittle above sustained 130°F temperatures. Bulverde attics regularly exceed 140°F from June through September. We replace degraded liner sections, secure with mechanical fasteners rather than tape alone, and reinsulate with R-8 or higher wrap. Flex duct repair in Bulverde typically ranges from $280 per run for isolated replacement to $1,200+ for full trunk-line rebuilds in larger homes.
Metal Duct Repair
Older Bulverde properties and some custom builds use galvanized steel ductwork. We repair separated seams, replace rusted sections, and seal with mastic and mechanical drives. Metal duct holds up better to attic heat but leaks at every joint if original sealant has dried out. Metal repairs in Bulverde generally start around $350 for seam work and run to $900 for section replacement with full reseal.
Air Leak Repair
Leaking collars, disconnected boots, and failed plenum seams waste 20-30% of conditioned air in the average Bulverde home we inspect. We pressure-test the system, mark every leak point, and repair with a combination of mechanical fastening and mastic sealant. Air leak repair is often bundled with cleaning; standalone leak detection and sealing starts at $400 for a single-zone system.
Duct Insulation
Where flex duct insulation has compressed, torn, or pulled away from the trunk line, we install new R-8 insulation with vapor barrier. This matters in Bulverde because the large day-to-night temperature swings on the Edwards Plateau create condensation on under-insulated duct surfaces, giving pollen and limestone dust a surface to adhere to. Duct insulation work ranges from $300 for spot repair to $1,100 for full system rewrap.
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.
BeforeAfterTrusted Brands We Service in Bulverde
Our equipment roster includes Nikro negative-pressure extractors, Honeywell media air cleaners, and Aprilaire whole-home dehumidifiers - brands customers can research independently before agreeing to any work. We stock common repair components for Bulverde-area homes, including flex duct in 6″, 8″, 10″, and 12″ diameters, mastic sealant rated for 200°F continuous exposure, and mechanical fasteners compatible with the builder-grade installations common in 2010-2020 construction. This means most repairs don’t wait on parts. For specialized components, our Dallas-Fort Worth office maintains next-day supply chain access.
Common Duct Repair & Sealing Problems We See in Bulverde Homes
- Flex-duct liner degradation in 140°F attics. The plastic liner inside flex duct becomes brittle and cracks after sustained exposure to Bulverde attic temperatures. Standard tape or mastic applied over a failed liner delaminates within a season and falls into the airflow, creating a new contamination source. We replace the damaged section entirely, then seal.
- Leaking collars and boots in newer subdivisions off FM 1863 and Hwy 46. Many homes built 2010-2020 were never cleaned after the builder’s certificate of occupancy inspection. Drywall dust and cellulose insulation fragments remain in the flex runs, leaking into the airstream even after collar leaks are sealed. We clean first, then seal - Haven Standard protocol.
- Condensation cycling trapping cedar pollen and limestone dust. The Edwards Plateau’s 30-40°F day-night temperature swings create moisture inside ductwork. Sealing a leak without source-removal cleaning first traps that moist debris permanently, creating a biological growth surface. Any duct sealing in Bulverde must follow full cleaning or you’ll mastic pollen in place.
- Neglected outbuilding and detached-workshop systems. Bulverde properties with wood heat in shops or guest houses often run on separate duct systems with poor filtration, long dryer-vent lint pathways, and extended service drives that delay maintenance. By the time we get the call, the blower motor has often already failed from overwork. We assess the full system, not just the leak.
Pricing for Duct Repair & Sealing in Bulverde, TX
Here’s what Bulverde homeowners actually pay, based on system size and condition:
| Service | Typical Range |
|---|---|
| Single air leak repair (collar/boot) | $280-$450 |
| Mastic sealing, partial system | $450-$850 |
| Flex duct repair/replacement, per run | $280-$650 |
| Full system reseal with cleaning | $850-$1,400 |
| Metal duct seam repair | $350-$900 |
| Duct insulation repair/rewrap | $300-$1,100 |
Factors that move the price: accessibility of attic runs, extent of liner degradation, whether the system requires full source-removal cleaning before sealing, and outbuilding systems that need separate assessment. We deliver a written price before any work starts - Haven Standard Clause 1 - and that price is the price. No per-vent add-ons, no equipment-surcharge surprises.
Call (830) 402-5110 for a free written estimate. Estimates include a preliminary photo assessment of accessible ductwork.
We Also Serve Cities Near Bulverde
Our crews regularly work Bulverde and surrounding Hill Country communities including Canyon Lake, Schertz, Universal City, and Cibolo. Scheduling is coordinated from our Dallas-Fort Worth office with local dispatch to your area.
Serving Bulverde, TX - Our Local Coverage Area
We’re based in the Bulverde 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 Bulverde
Every 18-24 months for homes with wood heat or significant cedar pollen exposure, compared to the 3-5 year interval standard in less challenging climates. The ultrafine pollen from November through February infiltrates return-air intakes on north- and west-facing homes, and wood heat produces fine ash particulate that accelerates duct contamination. We recommend a post-cedar-season inspection in March to assess whether sealing is needed before summer cooling loads peak. Call (830) 402-5110 to schedule - estimates are free.
Because many homes in the FM 1863 and Hwy 46 corridors were never cleaned after the builder’s certificate of occupancy inspection, and original flex-duct installations in 140°F attics degrade faster than the 20-25 year lifespan advertised. Drywall dust and cellulose insulation fragments from construction remain in the runs, accelerating wear on collars and boots. We’ve found 8-year-old systems with multiple failed liner sections. The age of your home doesn’t determine duct condition - the attic environment and construction debris do.
Yes. Flex-duct liner is rated for intermittent exposure to 150°F, but Bulverde attics sustain 140°F+ for 8-10 hours daily from June through September. That sustained heat oxidizes the plastic liner, making it brittle and prone to cracking at bends and support points. Once cracked, the liner tears under airflow pressure and insulation sags. Tape repairs over degraded liner fail within one season. We replace damaged sections with liner rated for continuous high-temperature exposure, then secure with mechanical fasteners.
Wood heat produces fine ash and creosote particulate that standard 1-inch filters don’t capture, loading ductwork faster than all-electric systems. Detached workshops often have separate duct systems with poor filtration, long dryer-vent lint pathways, and extended service drives that delay maintenance. We assess the full property, including outbuilding systems, and specify higher-MERV filtration and more frequent cleaning intervals. The sealing approach is the same - mastic and mechanical fastening - but the maintenance schedule differs.
The symptoms overlap - uneven temperatures, high energy bills, dust at registers - but the cause determines the fix. We pressure-test the system and photograph the interior of every accessible run. If the camera shows debris buildup with intact joints, you need cleaning. If pressure testing reveals significant loss at collars, boots, or seams with minimal debris, you need sealing. Often it’s both, and we specify the sequence in writing before starting. Call (830) 402-5110 for a free assessment with documented photo record.
Key Takeaways for Bulverde Homeowners
- Cedar pollen season and 140°F attic heat create failure modes unique to the Hill Country - generic duct sealing without local cleaning first makes problems worse.
- Written price before work starts, every time - Haven Standard Clause 1.
- Documented Photo Record of every duct run, before and after, included standard.
- 365-Day Done Right Promise in writing on every job.
- Free Second Opinion on any competitor’s written estimate.
Ready to see what’s actually inside your ductwork? Call (830) 402-5110 for a free written estimate. Our crew will photograph every accessible run, pressure-test for leaks, and deliver a fixed-price scope before any sealant is opened. No per-vent pricing. No equipment surcharges. Just documented evidence and a price you can hold us to.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Bulverde since 2013.
Duct Repair & Sealing in Nearby Areas
