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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Repair & Sealing Across Katy
Duct repair and sealing in Katy typically costs $280-$650 for most residential jobs, with flex duct replacement running $180-$340 per run and whole-system mastic sealing at $450-$890 for the average 2,500-square-foot home. Our crews are dispatched from our Houston office and carry the full Rotobrush and Nikro equipment roster needed for Katy’s specific housing stock: the aging flex-duct systems in master-planned communities like Cinco Ranch, Grand Lakes, and Firethorne. Call (346) 421-3357 for a written estimate before any work starts.
We’ve worked enough Katy homes to know the pattern. The same floor plans repeat across subdivision after subdivision. The same 14-inch flex duct sagging at the same elbow. The same boot pulled half an inch from the register because black-clay soil shifted the slab again. Our Duct Repair & Sealing team documents every finding with before-and-after photos, included as standard on every visit.
Why CleanRun Air Duct Cleaning Sugar Land Is Katy’s Preferred Duct Repair & Sealing Company
Katy homeowners don’t need another coupon in the mailbox. They need someone who can explain why the upstairs zone in their 2005-built two-story never keeps up in July, and show them the photo evidence. Since 2013, we’ve served 52,000+ homes with one rule: written price before work starts, every time, under Haven Standard Clause 1. No exceptions.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise backs every job in writing, not as a policy subject to manager approval. If the work isn’t right, we make it right.
Dispatch and scheduling for Katy are coordinated from our Houston office, with crews carrying local familiarity: we know which Cinco Ranch sections have the tighter crawl access, where Grand Lakes parking accommodates our service vehicles, and how Firethorne’s HOA notification requirements work. That local operational knowledge saves time on arrival.
Every customer receives a Documented Photo Record of every duct run, before and after. You can verify what was actually done against what was proposed. This practice has been standard since our first job in 2013.
Our Duct Repair & Sealing Services in Katy
Flex Duct Repair
Katy’s 1997-2012 master-planned tract homes are all hitting flex-duct failure age at once. The area has an unusually dense cohort of nearly identical homes whose flexible duct systems are now 12-25 years old and reaching peak failure age simultaneously. Compounding this, the 2017 Hurricane Harvey Barker Reservoir controlled releases flooded thousands of Katy homes that had never previously flooded, pushing moisture directly into duct systems that, even after surface-level home repairs, were often never properly cleaned or mold-remediated.
We were called to a two-story in Cinco Ranch where the upstairs zone was barely cooling. A camera inspection revealed a flex duct run that had collapsed at a sag point and a boot pulled away from a floor register due to slab movement. We performed source removal with agitation tools under negative pressure, reattached the boot with mastic sealant, and replaced the damaged section with new insulated flex duct, restoring proper airflow.
Typical flex duct repair in Katy runs $180-$340 per run, with full replacement of multiple runs in larger homes reaching $650-$1,200. We use professional-grade insulated flex duct rated for Katy’s humidity load.
Mastic Sealant Application
Mastic is a water-based sealant applied to joints, seams, and connections in metal or flex duct systems. Unlike tape, which degrades in Katy’s 70%+ average humidity, mastic forms a permanent flexible seal that accommodates thermal expansion and the subtle foundation movement common in black-clay soil areas.
Whole-system mastic sealing for a typical Katy two-story (2,500-3,500 sq ft) runs $450-$890. We apply it at every plenum connection, boot joint, and crossover - the points where pressure testing most often reveals leakage in the homes we service off FM 1463 and Mason Road.
Air Leak Repair
Air leak repair addresses the conditioned air escaping before it reaches your rooms. In Katy, we routinely find leaks at flex duct boots that have partially pulled away from floor registers due to slab movement from expansive black-clay soils. The conditioned air - and whatever contaminants are in the plenum - dumps directly into the subfloor cavity rather than the living space. Your energy bills climb. Your rooms stay uneven.
Leak detection starts with a pressure test, followed by camera inspection to locate the failure point. Repair typically involves reattachment, reinforcement, and sealing. Most Katy air leak repairs fall in the $220-$480 range.
Metal Duct Repair
Older Katy homes and custom builds in sections of Grand Lakes sometimes use galvanized metal ductwork. We repair separated seams, corrosion points, and damaged sections using proper sheet-metal techniques and mastic sealant. Metal duct repair in Katy typically runs $260-$580 depending on accessibility and extent.
Duct Insulation Replacement
Katy’s chronic condensation risk - from 9-10 months of AC runtime and rarely-below-70% humidity - degrades duct insulation from the outside in. Wet insulation loses R-value and becomes a mold substrate. We remove saturated insulation and install new vapor-barrier-wrapped insulation rated for Gulf Coast conditions. Insulation replacement runs $320-$720 for typical residential systems.
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.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Katy
Our equipment roster includes Rotobrush agitation systems for mechanical debris removal, Nikro negative-pressure extractors for contained source removal, and Honeywell airflow verification tools to confirm results after repair. We stock common flex duct diameters, boot sizes, and mastic supplies for Katy jobs, which means most repairs are completed in a single visit without waiting on parts. Customers can verify each manufacturer independently - we name the brands because the equipment should be inspectable, not mysterious.
Common Duct Repair & Sealing Problems We See in Katy Homes
- Flex duct boots separating from floor registers. Katy’s expansive black-clay soils cause significant seasonal slab movement in slab-on-grade homes. Technicians working the established subdivisions off FM 1463 and Mason Road routinely find boots that have partially pulled away, meaning conditioned air is dumping into the subfloor cavity. The register feels loose. The room won’t hold temperature.
- Chronic condensation inside flex ducts. Katy’s average relative humidity rarely drops below 70%, and AC systems run 9 to 10 months per year. This creates persistent condensation risk inside flex duct that accelerates mold and dust-mite allergen buildup far faster than in drier Texas markets.
- Collapsed flex duct at sag points. Long duct runs in 2,200-4,000 sq ft two-story homes develop low points where the flexible duct sags and collapses over time. Airflow drops. The HVAC system runs longer. Energy bills rise without any thermostat change.
- Post-Harvey microbial contamination. Thousands of Katy homes flooded during the 2017 Barker Reservoir releases. Surface repairs were completed. Duct systems were often overlooked. We still find supply and return ducts with visible microbial growth in homes where the owners believe the Harvey damage was fully remediated.
Pricing for Duct Repair & Sealing in Katy, TX
| Service | Typical Range in Katy |
|---|---|
| Single flex duct run repair/replacement | $180 - $340 |
| Air leak repair (boot reattachment, sealing) | $220 - $480 |
| Metal duct seam repair | $260 - $580 |
| Duct insulation replacement | $320 - $720 |
| Whole-system mastic sealing | $450 - $890 |
| Multiple run replacement + sealing | $650 - $1,200 |
These ranges reflect Katy’s market specifically: larger average home sizes, longer duct runs, and the prevalence of multi-zone systems. What changes the price? Accessibility (crawl space vs. attic), the number of zones, and whether post-Harvey contamination requires additional source removal before sealing can begin. Every job gets a written price before work starts - Haven Standard Clause 1. No per-vent pricing. No coupon bait. Bring a competitor’s written estimate and we’ll provide a Free Second Opinion, our number next to theirs.
We Also Serve Cities Near Katy
Our service area extends to Katy and the surrounding communities: Richmond, Sugar Land, Stafford, and Bellaire. Crews carry the same equipment roster, same documentation standards, and same written pricing policy across all locations.
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
Check for uneven cooling between floors, registers that feel loose or blow weakly, or musty odors when the AC cycles. These are common indicators that flex ducts in post-Harvey Katy homes have developed sag points, boot separation, or microbial contamination that was never addressed after the 2017 flooding. A camera inspection will show the actual condition inside the duct runs. Call (346) 421-3357 to schedule - estimates are free, and we deliver a written price before any work begins.
Expansive black-clay soils in Katy cause seasonal slab movement that gradually pulls flex duct boots away from floor registers. The register feels loose because the boot beneath it has separated from the subfloor, dumping conditioned air into the cavity below instead of your room. This is one of the most common failure modes we find in subdivisions off FM 1463 and Mason Road. Repair involves reattaching the boot and sealing with mastic. Call (346) 421-3357 for a written estimate.
Original duct sealing in Katy’s 1997-2012 tract homes is typically failing now after 12-25 years of thermal cycling and humidity exposure. Once properly sealed with mastic, a system should hold for 10-15 years unless foundation movement or physical damage occurs. We recommend pressure testing every 5 years in Katy due to the chronic condensation stress. Call (346) 421-3357 to schedule a test with documented photo results.
Yes, but only when combined with proper source removal. Duct sealing alone traps existing contamination inside. Our process removes microbial growth through negative-pressure extraction with agitation tools, then seals the cleaned system to prevent recontamination from humidity infiltration. This is particularly important in Katy, where post-Harvey duct systems were often never properly cleaned. Call (346) 421-3357 - we’ll show you the camera evidence before proposing any work.
Multiple zones mean more dampers, more branch connections, and more potential failure points - but the repair process is the same per zone. Firethorne homes typically use zone-controlled flex duct systems with longer runs, so we often find sag-related collapses in the attic trunks serving the upstairs zone. We test and document each zone independently. Call (346) 421-3357 for a written estimate covering all zones.
Ready to see what’s actually inside your ducts? Call (346) 421-3357 for a free estimate. You’ll receive a written price before any work starts, a Documented Photo Record of every duct run when we’re done, and the 365-Day Done Right Promise in writing. No per-vent pricing. No coupon bait. Just documented work you can verify.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Katy since 2013.