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 Houston
Duct repair and sealing in Houston typically costs $280-$750 for most residential systems, with flex duct replacement running higher when flood-damaged liners are involved. Our crews dispatch from our Houston office and carry mastic, flex connectors, and insulated duct board on every truck, so most jobs finish in a single visit without a parts run. Call (346) 251-8919 for a written estimate before any work starts.
We’ve worked in Houston homes since 2013, and the pattern is consistent: the Gulf Coast’s 70-75°F summer dew points and attics that hit 140-160°F create a unique stress on ductwork that inland Texas cities simply don’t see. Seals fail faster. Condensation feeds mold regardless of cleaning frequency. And in neighborhoods like Meyerland and Kingwood, flex duct liners still hold flood silt from Harvey-era inundation that surface fogging never touches. Our Duct Repair & Sealing team documents every run with before-and-after photos so you see exactly what was found and what was fixed.
Why CleanRun Air Duct Cleaning Houston Is Houston’s Preferred Duct Repair & Sealing Company
CleanRun is independently owned and operated under the Haven Standard, established in 2013, and has served over 52,000 homes with a written price before every job and a documented photo record after. In Houston specifically, our reputation rests on what we can show customers: the camera image of a failed mastic seal at a Spring Branch air handler collar, the moisture meter reading on a condensate-soaked flex run in Alief, the post-repair photo proving every boot and trunk joint is sealed and dry.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. We publish our license number on every page, not buried in a footer. The equipment roster includes Rotobrush, Nikro, and Honeywell systems that customers can research independently before agreeing to a price.
Every job carries the 365-Day Done Right Promise in writing: if the work is not right, we make it right. No manager approval required. We also offer a Free Second Opinion on any competitor’s written estimate - bring us their number and we’ll put ours next to it, line item by line item.
Scheduling and dispatch are coordinated from our Houston office, and crews serve Houston neighborhoods directly without routing through a regional call center.
Our Duct Repair & Sealing Services in Houston
Duct Sealing
Houston’s combination of extreme attic heat and saturated outdoor air destroys duct seals faster than nearly any major U.S. market. We seal every joint, boot, and trunk connection with mastic - not tape - because adhesive products fail within a single season in 140-160°F attics. Our crews pressurize the system and use smoke pencils or digital manometers to locate leaks the eye misses, then seal and verify. A typical whole-system seal in Houston runs $380-$620 depending on access and duct configuration.
Flex Duct Repair
Flex duct is common in Houston’s 1960s-1980s ranch stock, particularly in Spring Branch, Meyerland, Pasadena, and Alief. The plastic liner degrades in hot attics, and the fiberglass insulation compresses where the duct sags. We replace compromised flex runs with new R-8 insulated duct, secure with mechanical straps and mastic at every collar, and photograph the interior before closure. In flood-affected areas, we specifically inspect for Harvey-era liner contamination that fogging treatments left behind. Flex duct repair in Houston typically ranges $180-$340 per run.
Metal Duct Repair
Older Houston homes and commercial conversions sometimes have galvanized steel trunk lines. We patch rust-through sections, replace failed dampers, and seal longitudinal seams with mastic and fiberglass mesh. Metal work costs more per foot than flex but lasts decades longer in Houston’s humidity when properly sealed. Typical metal repairs run $320-$580.
Duct Insulation
Uninsulated or degraded duct insulation in Houston attics is an efficiency disaster. We install closed-cell foam or foil-faced fiberglass wraps rated for high-humidity environments, with particular attention to supply runs where cold air meets saturated attic air. Proper insulation prevents the condensation cycle that feeds mold growth regardless of cleaning frequency. Whole-system reinsulation in Houston averages $680-$1,200.
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 Houston
CleanRun crews carry professional-grade equipment from Rotobrush, Nikro, Honeywell, and Aprilaire on every Houston truck. We stock flex connectors, mastic, and insulation materials sized for the residential systems common in Houston’s post-WWII subdivisions, so most repairs don’t wait on a parts order. Our technicians train on manufacturer specifications for each brand - no improvised tooling, no “this should work” substitutions. Equipment names are documented on every written scope so customers can verify what will be used before signing.
Common Duct Repair & Sealing Problems We See in Houston Homes
- Condensation-driven mold in unconditioned attics. Houston’s 70-75°F summer dew points mean any leak pulls saturated air onto cold supply ducts. The result is a recurring mold problem that cleaning alone cannot solve until the leak is sealed and insulation restored.
- Failed mastic seals in 140-160°F attics. Original seals in 1970s Spring Branch and Meyerland homes have long since cracked. We remove the old material and reseal with fresh mastic rated for high-temperature, high-humidity cycling.
- Flood-damaged flex liners never replaced after Harvey. In Meyerland, Kingwood, and parts of the Energy Corridor, we regularly find flex duct that was submerged in 2017 and cosmetically dried but never remediated. The liner folds hold sewage-associated mold species that no fogging treatment reaches.
- Tape “repairs” that fail within months. Competitors or homeowners sometimes seal flex connectors with foil tape. In Houston attics, the adhesive degrades rapidly, letting blown insulation fibers and humid attic air back into the supply stream.
Pricing for Duct Repair & Sealing in Houston, TX
Honest pricing means naming numbers. In Houston’s market, a typical duct sealing job runs $380-$620. Flex duct repair or replacement per run is $180-$340. Metal duct repair ranges $320-$580. Whole-system duct insulation averages $680-$1,200. Post-flood remediation with liner replacement and full sealing runs $890-$1,600 depending on system size and contamination extent.
What moves the price: access difficulty (crawl space vs. walk-up attic), number of compromised runs, whether flood damage requires HEPA-contained removal, and whether the plenum or air handler collar also needs resealing. 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 “we found another problem” upsells once the panel is off.
Call (346) 251-8919 for a free written estimate. We’ll inspect, photograph, and price before you decide.
We Also Serve Cities Near Houston
Our Houston crews regularly work in Pasadena, Bellaire, Humble, and Deer Park - the same written pricing, same documented photo record, same 365-Day Done Right Promise. Scheduling is coordinated through our Houston office for the entire metro area.
Serving Houston, TX - Our Local Coverage Area
We’re based in the Houston 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 Houston
The musty smell returns because the source of moisture was never eliminated. Houston’s year-round 70%+ humidity and 70-75°F summer dew points mean any unsealed duct joint or failed flex connector pulls saturated attic air onto cold supply runs, creating condensation that feeds mold regardless of how recently the ducts were cleaned. Cleaning without sealing is temporary in this climate. Call (346) 251-8919 and we’ll pressure-test for leaks, seal with mastic, and verify the system stays dry.
Yes. Flex duct liners submerged in 2017 or later flood events and never professionally replaced often test positive for sewage-associated mold species and bacterial contamination hidden in liner folds that no surface cleaning or fogging reaches. We encountered exactly this on Cedar Creek Drive in Meyerland: a homeowner called after a musty smell returned a month after another company’s fogging treatment. Our camera inspection found the flex duct liner still holding flood silt and microbial growth from the Harvey inundation, plus failed mastic at the air handler collar. We pulled the contaminated flex run under negative pressure with HEPA filtration, replaced the connector and insulation, sealed every boot and trunk joint with mastic, and confirmed with a post-job camera pass that the supply and return ducts were dry and clean. If your Meyerland home flooded and the ducts were not fully replaced, call (346) 251-8919 for a camera inspection.
No - not if the underlying contamination and moisture source remain. Fogging or “sanitiser” treatments mist the duct interior without removing contaminated material or sealing the leak that feeds it. In Houston’s year-round high humidity, microbial growth survives because the contaminated liner and the condensation-feeding leak are both left in place. The money is better spent on source removal, liner replacement if flood-damaged, and proper sealing with mastic. We document the difference with before-and-after photos so you can see what was actually removed versus what was merely masked. Call (346) 251-8919 for a written scope that specifies physical remediation, not chemical concealment.
Original mastic and tape seals from the 1960s-1980s have endured 40+ years of Houston’s extreme attic heat cycling, often 140-160°F in summer. The material cracks and separates; flex duct connectors degrade; and the original R-4 or uninsulated flex has compressed or torn. Re-taping fails within a season because adhesive products are not rated for sustained high temperature. We remove failed material entirely, reseal with fresh mastic rated for Houston’s conditions, replace degraded flex runs with R-8 insulated duct, and secure with mechanical straps. Call (346) 251-8919 for a camera inspection of your Spring Branch system.
We pressure-test the system and use smoke pencils or digital manometers to locate leaks; the camera shows whether the interior holds debris buildup or structural damage. If pressure drops significantly and smoke streams from joints, you have leaks that cleaning cannot fix. If pressure holds but the camera shows debris accumulation, cleaning is the right first step. Often in Houston we find both: leaks that have allowed attic air and insulation fibers to enter, creating debris that cleaning removes but sealing prevents from returning. We photograph everything and show you before quoting. Call (346) 251-8919 for the test and written findings.
Ready to stop the cycle of musty air and recurring mold? Call (346) 251-8919 for a free written estimate. Our Houston office will schedule a technician who arrives in uniform, identified by name, with a camera and a manometer - not a fogging machine and a coupon. Every job starts with a written price and ends with a documented photo record of every duct run, backed by our 365-Day Done Right Promise in writing.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Houston, serving Houston since 2013.