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 Denver
Duct repair and sealing in Denver typically costs $280-$680 for most residential jobs, with full-system sealing on older ranches running higher when stud-bay returns and disconnected attic trunks need addressing. We’re local to the metro area, dispatching crews from our Denver office to homes in Lakewood, Wheat Ridge, Englewood, and throughout the city. Most inspections are scheduled within a few business days, and every visit starts with a written price before any panel comes off. Call (720) 513-5159 to book.
Denver’s housing stock is specific. The 1950s-1970s ranches that dominate established neighborhoods weren’t built for modern HVAC loads, and decades of Chinook-driven cycling have taken their toll on original ductwork. Our Duct Repair & Sealing team documents what we find, photographs every run, and seals what can be sealed rather than selling you a full replacement you don’t need.
Why CleanRun Air Duct Cleaning Aurora Is Denver’s Preferred Duct Repair & Sealing Company
We’ve served the Denver metro since 2013, completing over 52,000 jobs with a written price delivered before work started every time. That includes thousands of homes in Denver proper, from the post-war ranches of eastern suburbs to the gut-renovated bungalows near Highland and Berkeley. Our technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews.
Our documented photo record is standard on every visit, not an upsell. Customers in Denver receive before-and-after images of every duct run, delivered as part of the job record. The 365-Day Done Right Promise applies in writing, not as a verbal assurance. If the work isn’t right, we make it right.
We coordinate scheduling from our Denver office, which means crews know the local building stock. They recognize the stud-bay return shortcuts common in 1960s Wheat Ridge construction and the low attic chases that sag in Lakewood ranches with original sheet metal. That familiarity saves diagnostic time and keeps the written quote accurate.
We also offer a Free Second Opinion on any written estimate. Bring a competitor’s Denver quote; we’ll put our number next to it in writing.
Our Duct Repair & Sealing Services in Denver
Duct Sealing
Sealing is often the critical step missing from duct cleaning alone. In Denver’s older ranches, we regularly find supply trunks in unconditioned crawl spaces with open seams pulling in rodent detritus and blown-in insulation fragments. The camera shows it clearly. We seal accessible joints with mastic sealant rated for temperature cycling, then pressure-test to verify the fix. A typical duct sealing job in Denver runs $320-$580 depending on accessible linear footage and the condition of existing fittings.
Flex Duct Repair
Flex duct, common in Denver AC retrofits from the 1980s and 1990s, crushes in tight attic chases and disconnects at takeoff collars. We replace damaged sections with new flex rated for the application, secure with mechanical fasteners, and seal with mastic. In Englewood and older Aurora, we see flex duct that was never properly supported, creating sag points where debris collects. Repair of isolated flex sections in Denver typically falls between $180-$340.
Metal Duct Repair
Original galvanized steel trunks in Denver’s 1950s-70s homes corrode at seams and separate at drive cleats. We repair where possible, replace short sections where metal is too degraded, and seal all joints with mastic. The goal is preserving the original trunk while stopping the leaks that pull crawl-space air into the supply stream. Metal duct repair in Denver generally ranges $280-$520.
Duct Insulation
Unconditioned crawl spaces and low attics in Denver’s ranch belt expose ductwork to temperature extremes. We add or replace insulation on repaired runs using materials appropriate for the location. Proper insulation reduces the thermal loss that makes Chinook-driven cycling even harder on your system. Duct insulation work in Denver typically adds $150-$300 to a sealing job when done together.
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 Denver
Our equipment roster includes Rotobrush for agitation and contact cleaning, Nikro for negative-pressure extraction systems, and Guardsman-approved connectors and sealants for flex duct repair. We stock mastic sealants and mechanical fasteners appropriate for Denver’s temperature-swing climate, not generic hardware-store products that crack in dry cold. Customers can verify every brand independently; we name them specifically because the equipment matters as much as the technician operating it.
Common Duct Repair & Sealing Problems We See in Denver Homes
- Stud-bay returns pulling crawl-space debris. In 1960s Denver ranches, the “return duct” is often just the gap between drywall and subfloor, open to the crawl space. Our camera regularly finds active rodent nesting material and insulation fragments where homeowners expect a sealed system. Sealing these cavities is the only fix that stops the contamination cycle.
- Disconnected sheet-metal joints in low attic chases. Original trunks in Lakewood and Wheat Ridge ranches separate at seams after decades of thermal expansion from Chinook swings. The blower pulls attic dust and, after fire season, fine carbon debris directly into the supply stream.
- Post-wildfire smoke particulate embedded in dust layers. After Front Range events like the Marshall Fire, Denver homeowners run HVAC continuously for filtration. Fine carbon debris embeds in existing duct dust and off-gasses for months. Cleaning without sealing the leaks that let new contamination in simply redistributes it on the next cycle.
- Crushed flex runs from unsupported AC retrofits. Denver’s dry climate keeps debris mobile rather than letting it settle, so restricted airflow in crushed flex accelerates the problem. Debris concentrates at choke points and gets blown through in pulses when the system cycles hard during temperature swings.
Pricing for Duct Repair & Sealing in Denver, CO
Honest pricing means naming the range before you call. In Denver’s market, typical costs are:
- Basic duct sealing (accessible seams, 1-2 problem areas): $280-$420
- Moderate sealing with flex repair (multiple runs, stud-bay return sealing): $380-$580
- Full-system sealing with insulation and metal repair: $520-$680
- Isolated flex duct repair (single run): $180-$340
- Metal trunk repair with mastic sealing: $280-$520
What moves the number: accessibility (crawl space height, attic chase clearance), linear footage of ductwork, and whether we’re sealing existing joints or rebuilding disconnected sections. Every quote is written and agreed before work starts under Haven Standard Clause 1. No per-vent pricing, no add-ons after arrival. Call (720) 513-5159 for an exact quote; estimates are free.
We Also Serve Cities Near Denver
Our Duct Repair & Sealing in Denver crews also work in Aurora, Commerce City, Englewood, and Thornton. Building stock and conditions vary by municipality; we adjust our inspection approach for each city’s dominant housing type and vintage.
Serving Denver, CO - Our Local Coverage Area
We’re based in the Denver 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 Denver
No. A crawl-space odor from your vents indicates an open return path, not a normal condition. In Denver’s 1960s ranches, this usually means a stud-bay return open to the crawl space or a disconnected joint in the return trunk. We locate the breach with camera inspection and seal it with mastic or rebuilt ductwork. Call (720) 513-5159 to schedule; we’ll put the repair scope and price in writing before starting.
Fine carbon particulate from wildfire smoke embeds in existing dust layers inside ductwork and continues off-gassing for months. In Denver’s dry climate, these particles stay mobile rather than settling, so each HVAC cycle redistributes them through your home. Cleaning alone doesn’t solve it if the leaks that pulled contaminated air into the system remain unsealed. We seal first, then clean, so the contamination cycle stops. Call (720) 513-5159 for an inspection and written quote.
Sealing improves system efficiency and reduces debris migration, but it doesn’t add humidity. The real benefit in Denver is stopping the aggressive cycling from pulling unconditioned crawl-space or attic air into your ducts. Sealed systems maintain pressure balance better, which means less strain during 40-degree Chinook swings and fewer temperature spikes that force the blower to overwork. Call (720) 513-5159 to discuss whether your specific duct configuration would benefit.
We start with a visual and camera inspection of accessible ductwork, followed by a negative-pressure test to identify leaks. You receive a written scope and price before any repair begins. Work typically includes sealing accessible joints with mastic, repairing or replacing damaged flex or metal sections, and pressure-testing afterward to verify results. Every run is photographed before and after; the photo record is included as a standard deliverable. Call (720) 513-5159 to book.
Cleaning removes accumulated debris but doesn’t stop new contamination from entering through leaks. In Denver’s older ranches with stud-bay returns and disconnected attic trunks, cleaning without sealing is temporary. The debris source remains active. We recommend sealing first on systems with verified leaks, then cleaning if interior buildup warrants it. Call (720) 513-5159 for an honest assessment of whether your ducts need one, the other, or both.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Denver since 2013.