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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AfterFast, Reliable Duct Repair & Sealing Across Katy
Duct repair and sealing in Katy typically costs $280-$680 for most residential systems, with flex duct replacement running higher when Harvey-era contamination or collapsed inner liners are involved. Our crews coordinate dispatch from our Houston office and carry Rotobrush and Nikro equipment to Katy daily, including Bear Creek Farms, Canyon Gate, Kelliwood, and the full Cinco Ranch corridor. Call (346) 248-1474 for a written price before any work starts - every time, no exceptions.
We’ve been in enough Katy attics to know the pattern. The 2000s master-planned boom built thousands of homes with flex duct routed through unconditioned attic space. Two decades of Gulf Coast heat cycles, Harvey’s reservoir flooding, and dewpoints above 70°F for half the year have turned those systems into the exact failure modes our Duct Repair & Sealing team documents on every visit.
Why CleanRun Air Duct Cleaning The Woodlands Is Katy’s Preferred Duct Repair & Sealing Company
Katy homeowners don’t need another coupon in the mailbox. They need someone who’ll open the plenum, show them the photo, and put a number in writing before touching a tool. That’s Haven Standard Clause 1, and it’s how we’ve operated since 2013.
Our documented photo record - every duct run, before and after - means a homeowner in Cross Creek Ranch can see exactly why her supply line is holding 40% less static pressure than design. The 365-Day Done Right Promise covers the work in writing, not as a verbal assurance that disappears with the technician. Tomas Reyes established this protocol when CleanRun opened, and it hasn’t changed.
Calls route to a live person, 24/7. Technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. For Duct Repair & Sealing in Katy, that means no third-party dispatchers, no unnamed subcontractors, and no price that materializes after the truck is in your driveway.
We also offer a Free Second Opinion on any written estimate. Bring a competitor’s quote. We’ll put our number beside it, itemized, with nothing held back.
Our Duct Repair & Sealing Services in Katy
Duct Sealing
Sealing in Katy starts with understanding what you’re sealing. After Harvey, fine reservoir silt entered return systems across low-lying subdivisions, and that silt doesn’t leave with tape alone. We seal plenum joints and trunk connections with mastic sealant, then verify the repair under negative-pressure extraction so the homeowner sees the gauge hold. A sealed system in a Katy slab home - no basement, all ductwork overhead - means conditioned air reaches the register instead of leaking into a 145°F attic.
Flex Duct Repair
This is the service we perform most often in Katy. Original flex runs in Cinco Ranch and Kelliwood homes from 2000-2005 have inner liners that separate at elbows after two decades of expansion and contraction. The outer insulation wrap looks intact. The air handler runs. But the inner liner is blowing into the attic, not the bedroom. Our crews cut out the failed section, install new flex with proper support straps to eliminate sag, and photograph the repair. Flex duct repair in Katy typically runs $340-$580 per run, depending on attic access and length.
Metal Duct Repair
Some older Katy homes and custom builds in Firethorne use galvanized trunk lines with flex takeoffs. We repair separated seams, replace rusted sections, and reseal with mastic where tape has dried and failed. Metal repair is less common in Katy’s 2000s housing stock but critical where it exists - a leaking metal trunk in an unconditioned attic wastes more energy than multiple flex leaks combined.
Duct Insulation
Attic temperatures in Katy exceed 140°F for months. Original insulation wrap on flex duct compresses, tears, and delaminates. We install new insulation with vapor barriers rated for Gulf Coast humidity, supported so it doesn’t sag onto the duct and create condensate traps. Properly insulated ductwork in Katy reduces the thermal loss that makes second-story rooms unbearable by July.
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 Katy
CleanRun crews carry professional-grade equipment from Honeywell, Aprilaire, and Guardsman on Katy jobs. We stock common plenum fittings, mastic compounds, and flex duct diameters so most repairs complete in one visit without waiting on Houston warehouse delivery. For specialized components - certain Aprilaire zoning panels or Honeywell media cabinet retrofits - we source with next-day turnaround and schedule the seal-and-test visit once parts arrive. The equipment roster is published so homeowners can verify specifications independently.
Common Duct Repair & Sealing Problems We See in Katy Homes
- Harvey silt contamination in return plenums. The intentional flooding of Addicks and Barker Reservoirs pushed fine sediment into ductwork across Bear Creek Farms and Canyon Gate. That silt never fully dried, and it creates a mold-friendly substrate that reactivates every cooling season once dewpoints climb past 70°F. Sealing over it without remediation traps the problem inside.
- Flex duct inner liner collapse at elbows. In Cinco Ranch and Kelliwood homes built 2000-2005, the inner liner separates from the wire helix after two decades of 140-150°F attic heat cycling. The system still moves air, but it’s moving attic air mixed with conditioned air, and sealing tape alone won’t reconnect a separated liner.
- Sag-induced condensate pooling. Original builder-grade flex runs lack proper support straps. Low points form between trusses, condensate collects from humid attic air contacting cold duct surfaces, and the weight disconnects boots from the air handler. We see this in Cross Creek Ranch and Firethorne homes where attic access is tight and original installers cut corners on strapping.
- Failed tape at plenum joints. Standard foil tape degrades in Katy’s attic heat within 3-5 years. Joints that were tight at construction leak steadily, dropping static pressure and pulling fiberglass insulation into the airstream. Mastic sealant is the only repair that holds under these conditions.
Pricing for Duct Repair & Sealing in Katy, TX
Duct sealing for a typical Katy single-family home runs $280-$450 for mastic application and pressure verification across the full system. Flex duct repair, including replacement of failed runs with proper support and insulation, ranges $340-$580 per run depending on length and attic access difficulty. Full flex duct replacement in a 2,200-square-foot Katy home - common when multiple runs have collapsed liners - typically falls between $1,800 and $3,200.
What moves the number: attic temperature (summer work requires heat safety protocols that extend labor time), number of runs affected, whether Harvey-era silt remediation is needed before sealing, and accessibility - some Kelliwood homes have truss designs that require partial decking removal.
Every price is written before work starts, every time. No per-vent pricing, no add-ons after arrival. Call (346) 248-1474 for a free estimate with itemized scope.
We Also Serve Cities Near Katy
Our service radius includes Katy plus Tomball, Bellaire, Pinehurst, and Prairie View. Crews carry the same equipment, same documentation protocol, and same written-price guarantee to each of these areas. Scheduling is coordinated from our Houston office with route optimization to minimize drive time and respect your appointment window.
Serving Katy, TX - Our Local Coverage Area
We’re based in the Katy 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 Katy
Homes near Addicks and Barker Reservoirs should have ducts inspected every 3-4 years and cleaned when camera inspection shows debris buildup exceeding 1/8 inch or visible mold. Our Katy Dryer Vent Cleaning service can be bundled with duct inspection to address lint accumulation that compounds airflow restrictions. The Harvey silt layer in many return plenums accelerates contamination, so the standard 5-7 year interval doesn’t apply here. Call (346) 248-1474 to schedule a camera inspection - estimates are free.
Flex duct inner liners degrade from sustained attic heat above 140°F and high humidity that keeps condensation active on cold duct surfaces. Metal duct doesn’t have a flexible inner liner to separate, and its seams are more accessible for permanent mastic repair. In Katy’s climate, properly installed metal trunk systems typically outlast flex by 10-15 years. Call (346) 248-1474 if you’re unsure which system your home has - we’ll verify during the free estimate.
No - slab homes in Katy route all ductwork through the attic, so every joint and boot is exposed to extreme heat and requires mastic-rated sealant, not tape alone. Basement systems in other markets have conditioned or semi-conditioned chase access; Katy’s slab construction means we work entirely in unconditioned attic space and verify seals under negative pressure because visual inspection alone isn’t reliable at 145°F. Call (346) 248-1474 for a written scope specific to your home’s configuration.
After sealing, use MERV 8-11 for standard residential systems in Katy; MERV 13 and above restricts airflow on older HVAC equipment common in 2000s tract homes and can freeze coils in high humidity. The sealed duct system is only as good as the filter protecting it, and Katy’s pollen load from surrounding open land is significant. Call (346) 248-1474 and we’ll check your air handler specs against filter options during the estimate visit.
Yes - camera inspection through the trunk and first few runs reveals inner liner condition, joint separation, and contamination depth before any cleaning or repair begins. A homeowner in Canyon Gate called us after Harvey-era moisture left her 2003 home’s attic air handler smelling musty every time the blower motor ran; our techs opened the return, found the flex duct inner liner separated at two elbows and silt-clogged insulation, ran camera inspection through the trunk, then sealed the plenum and joints with mastic, re-taped the flex runs under negative pressure, and left the system holding static pressure again - no more smell, no more guesswork. Call (346) 248-1474 for the same documented assessment at your home.
Ready to see what’s actually inside your ducts? Call (346) 248-1474 for a free estimate with written price, camera inspection, and documented photo record included on every visit. The 365-Day Done Right Promise applies to every Katy job we complete.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning The Woodlands, serving Katy since 2013.