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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Before
AfterFast, Reliable Duct Repair & Sealing Across Canyon Lake
Most duct repair and sealing jobs in Canyon Lake run $280-$680 for single-system homes, with flex duct replacement on older lake properties toward the higher end. We’re the local crew that handles the real conditions out here: cedar pollen loading, reservoir humidity, and ductwork that’s been sitting idle through off-seasons. Dispatch and scheduling are coordinated from our San Antonio office, but our crews serve Canyon Lake directly and know the difference between a 1970s cabin off FM 2673 and a 2010s build near the golf course. Call (830) 402-5110 and we’ll put a written price in front of you before any panel comes off.
Why CleanRun Air Duct Cleaning Schertz Is Canyon Lake’s Preferred Duct Repair & Sealing Company
We’ve been serving this market since 2013. That’s 52,000+ homes, every one with a written price before work started and a documented photo record when the crew left. Canyon Lake homeowners aren’t looking for a sales pitch. They want to see what was in their ducts, what got fixed, and what it cost - all in writing.
Our technicians are background-checked, uniformed, and identified by name before arrival. Haven Standard Clause 3: Verified Crews. The license number is published on this page, not buried in a footer. Every job is backed by our 365-Day Done Right Promise - if it’s not right, we make it right, in writing, not subject to manager approval.
We don’t do urgency theatre. No countdown timers, no “only 2 slots left.” What we do is show up with Rotobrush and Nikro equipment, photograph every duct run before and after, and hand you a written scope and warranty before the truck leaves. That’s the standard. Not the exception.
Our Duct Repair & Sealing Services in Canyon Lake
Duct Sealing
Leaky ducts in Canyon Lake homes waste 20-30% of conditioned air on average, and that’s before accounting for the gaps rodents create in vacation properties sitting idle. Our crew seals supply and return plenums (the main distribution boxes attached to your air handler) with mastic sealant - a thick, fiber-reinforced paste that outlasts tape by decades. In lakefront homes near Cranes Mill Road, we regularly find original duct boots (the metal connections at each vent) pulling away from drywall due to humidity cycling. We reseat and seal every connection, then pressure-test the system to verify the fix.
Flex Duct Repair
Flex duct - the insulated flexible tubing common in 1960s-1990s Canyon Lake builds - degrades faster here than in drier climates. The reservoir humidity swells the fiberglass insulation, and repeated AC cycling in short-term rentals fatigues the inner wire helix. Our crew replaces collapsed or rodent-damaged flex runs with new R-6 or R-8 insulated duct, supported at proper intervals so it doesn’t sag and pool condensation. We use mastic sealant on every connection, not tape. A typical flex duct repair in Canyon Lake runs $340-$580 depending on crawlspace access and linear footage.
Metal Duct Repair
Older lake cabins and some newer high-end builds use galvanized steel ductwork. The joints separate over time, and rust forms where condensation collects at low points. We reseal metal seams with mastic, replace rusted sections with new galvanized or lined duct, and insulate exposed runs to prevent future condensation. Metal duct repair in Canyon Lake typically runs $280-$520 for standard residential systems.
Duct Insulation
Uninsulated or degraded duct insulation in Canyon Lake crawlspaces and attics creates two problems: condensation dripping onto ceilings, and thermal loss that makes your AC run longer in July. We install new foil-faced fiberglass insulation at R-6 or R-8 value, sealed at all seams. For lake homes with pier-and-beam foundations or elevated crawlspaces, this is often the difference between a dry system and one that grows mold inside the duct wall.
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.
BeforeAfterTrusted Brands We Service in Canyon Lake
We carry Honeywell media air cleaners and Aprilaire MERV 13 filtration systems on our Canyon Lake trucks - the same units we specified for the Cranes Mill Road cabin where cedar pollen had overwhelmed a standard 1-inch filter. Our repair inventory includes Abatement Technologies HEPA-negative-air machines for contained work in occupied homes. These aren’t decorative badges. You can look up every model number, verify specifications, and know exactly what equipment is entering your home before you agree to a price.
Common Duct Repair & Sealing Problems We See in Canyon Lake Homes
- Cedar pollen and reservoir humidity cause mold colonization inside ducts. The Canyon Lake reservoir raises localized humidity, and when HVAC systems sit idle for months in vacation homes, moisture condenses inside ductwork. Combined with Ashe juniper pollen that bypasses standard filters, this creates a yellowish, waxy residue that supports mold growth. We find it most often in supply ducts near the air handler in homes off FM 2673.
- Rodents chew through old flex duct and enter through gaps around idle duct boots. Unoccupied homes are targets. Mice squeeze through gaps as small as a dime, nest in fiberglass insulation, and chew holes for passage. Our crew was called to a 1970s lake cabin on Cranes Mill Road where the owners returned after a three-month absence to find a musty smell and weak airflow. Using a camera inspection, we found compacted yellow cedar pollen coating the supply and return ducts near the air handler, along with rodent-chewed flex duct in the crawlspace. We performed source removal with agitation tools and negative pressure, repaired the flex runs with mastic sealant and new insulation, and upgraded the filter to a MERV 13 Aprilaire unit. The airflow was restored and the musty odor eliminated.
- Repeated boom-and-bust HVAC cycles in short-term rentals accelerate debris buildup. Canyon Lake’s high proportion of vacation rentals means systems go from idle to full-blast repeatedly. Clogged blower motors and restricted airflow are the result. Filters rarely get changed between guests. We recommend a documented cleaning and inspection interval of 18-24 months for part-time occupancy, versus 3-5 years for full-time homes in less challenging environments.
- Original ductwork never designed for year-round occupancy. Many 1960s-1980s Canyon Lake cabins were built with minimal insulation, single-pane windows, and ductwork sized for occasional weekend use. When these homes convert to full-time residence or short-term rental, the ducts are undersized and overstressed. We resize and seal to modern standards, documenting every change in the photo record.
Pricing for Duct Repair & Sealing in Canyon Lake, TX
Here’s what duct repair and sealing actually costs in the Canyon Lake market, based on jobs we’ve completed in the past 24 months:
| Service | Typical Range |
|---|---|
| Duct sealing (single system, mastic) | $280-$420 |
| Flex duct repair/replacement (per run) | $340-$580 |
| Metal duct repair (sectional) | $280-$520 |
| Duct insulation (per run) | $180-$340 |
| Full system seal + insulation upgrade | $680-$1,200 |
These are whole-system prices, not per-vent teaser rates. Every quote is written and agreed before work starts - Haven Standard Clause 1. No exceptions. Factors that move the needle: crawlspace access difficulty, linear footage of damaged duct, whether we need to contain the work area with negative-pressure extraction for occupied homes, and whether we’re coordinating with an HVAC contractor on simultaneous equipment replacement. We also offer a Free Second Opinion on any written estimate from another company - bring their quote, we’ll put our number next to it in writing. Call (830) 402-5110 for an exact quote. Estimates are free.
We Also Serve Cities Near Canyon Lake
Our crews work throughout the Hill Country corridor surrounding Canyon Lake. We regularly dispatch to Canyon Lake from our San Antonio office, and we also serve homeowners in New Braunfels, Bulverde, Schertz, and Cibolo. If you’re between these points and need Duct Repair & Sealing, we cover your area.
Serving Canyon Lake, TX - Our Local Coverage Area
We’re based in the Canyon Lake 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 Canyon Lake
Every 18-24 months for part-time Canyon Lake homes, versus 3-5 years for full-time occupancy in standard environments. The combination of cedar pollen, reservoir humidity, and idle systems creates conditions that accelerate buildup. Homes sitting unfiltered through December-February cedar season accumulate the most residue. Call (830) 402-5110 to schedule an inspection and we’ll show you exactly what’s inside with a camera.
Musty odors, sudden airflow reduction at specific registers, visible insulation debris near vent covers, and scratching sounds in walls or ceilings are the most common indicators. In Canyon Lake, rodent entry peaks in fall and winter when lake homes go unoccupied. We find chewed flex duct and nesting material most often in crawlspaces and attic runs. Our inspection includes a camera review of every accessible duct run, with photos delivered as part of the standard job record.
Yes. Cedar pollen is fine and waxy, not loose and dry. Standard vacuuming doesn’t dislodge it. We use mechanical agitation tools - whips and brushes on flexible rods - to break the pollen loose from duct walls, followed by negative-pressure extraction with a Nikro HEPA-collector. The waxy residue also means filters need upgrading; we typically specify MERV 13 or higher for Canyon Lake homes, not the 1-inch fiberglass panels that let pollen pass.
It helps, but it’s not the full solution. Sealing leaks prevents humid outside air from being drawn into the return side, which reduces the moisture load on your AC. For lakefront properties on the reservoir, we also inspect and upgrade duct insulation to prevent condensation on cold supply ducts. In severe cases, we coordinate with HVAC contractors to add whole-home dehumidification. The photo record from our inspection shows where the moisture is entering, so you can make an informed decision.
Boom-and-bust cycling. A rental property might sit at 85°F for two weeks, then get blasted to 72°F for a weekend of guests. That thermal shock fatigues duct connections and accelerates debris shedding from flex duct interiors. Filters rarely get changed between bookings. We’ve opened ducts in Canyon Lake rentals where the blower motor was clogged with a composite of cedar pollen, pet dander, and disposable filter fragments that collapsed and got sucked into the system. A documented 18-month cleaning interval prevents the expensive emergency calls.
Ready to see what’s actually inside your ducts? Call (830) 402-5110 for a free estimate. We’ll put a written price in front of you before any work starts, photograph every run before and after, and back the job with our 365-Day Done Right Promise - in writing, every time.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Schertz, serving Canyon Lake since 2013.