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 Greenwood Village
Most duct sealing jobs in Greenwood Village run $850-$2,400 per HVAC system, with multi-zone homes typically needing separate scope and pricing for each unit. We dispatch crews from our Denver office and carry the full equipment roster needed for large homes with complex duct layouts - Rotobrush agitation systems, Nikro negative-pressure units, and Honeywell airflow verification tools - so we’re not making a second trip for parts. Call (720) 799-2292 and we’ll put a written price in your hand before any panel comes off.
Our Duct Repair & Sealing team knows the south Denver metro’s housing stock. We’ve worked on the multi-zone systems off Belleview Avenue, the horse-keeping properties near the High Line Canal, and the executive homes backing onto the Cherry Hills Country Club perimeter. That local familiarity matters because Greenwood Village’s homes are not typical. They’re larger, older in their core mechanical systems, and subject to contamination profiles you won’t find in neighboring suburbs.
Why CleanRun Air Duct Cleaning Denver Is Greenwood Village’s Preferred Duct Repair & Sealing Company
We’ve served this market since 2013. Every one of those 52,000-plus jobs started with a written price and ended with a documented photo record - before and after shots of every duct run, delivered as a standard job record, not an upsell.
Greenwood Village homeowners tend to research before they call. They ask about licensing, insurance, and what exactly they’ll receive in writing. We answer directly: our technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and our license number is published on this page, not buried in a footer. The 365-Day Done Right Promise is backed in writing on every job - if the work is not right, we make it right.
Dispatch and scheduling are coordinated from our Denver office, and crews serve Greenwood Village with the parts inventory to handle same-visit repairs on flex duct, metal trunk lines, and mastic sealant work. No “we’ll order that and come back.” The truck carries what the house needs.
We’re also transparent about what we find. On a recent call off Arapahoe Road, the camera showed a 3-inch debris build-up at the first elbow of a return trunk - hay chaff and fine grit from a horse-keeping lot. The homeowner saw the image before we discussed scope. That’s standard practice, not a special request.
Our Duct Repair & Sealing Services in Greenwood Village
Mastic Sealant Application
Mastic is the heavy, paste-like sealant brushed onto duct joints and takeoffs - it outlasts foil tape in Colorado’s dry climate by a wide margin. In Greenwood Village, we apply it with particular attention to the farthest takeoffs on long runs, where pressure drop and altitude-driven thermal swing crack standard seals first. A typical mastic re-seal on a single-zone system in Greenwood Village runs $850-$1,400; multi-zone homes with 1970s-80s fiberglass-lined trunks need more prep time and HEPA-contained negative pressure, pushing the per-system range to $1,200-$2,100. We photograph every joint before and after.
Flex Duct Repair
Flex duct - the insulated flexible tubing connecting trunk lines to registers - fails at the collars first, especially in Greenwood Village’s low-humidity environment at 5,600 feet. The rubberized seals dry-crack faster here than in lower-elevation suburbs like Englewood or Aurora. Our crews carry replacement flex in standard diameters and collar hardware rated for that dry swing, not standard Denver metro spec. Typical flex repair or replacement on a single run runs $180-$340; full flex re-runs on a zone can reach $600-$1,100. We write the price before we cut anything.
Metal Duct Repair
Original fiberglass-lined metal trunk lines from Greenwood Village’s 1975-1995 development boom require careful handling. The liner degrades. Negative pressure that’s too aggressive dislodges it into the living space - the wrong technique turns a repair into a contamination event. We use controlled agitation and HEPA filtration, verify liner integrity with camera inspection, and only then re-seal. Metal trunk repair with liner preservation runs $1,100-$2,400 per system depending on access and branch count.
Duct Insulation
Uninsulated or degraded ductwork in attics and crawl spaces loses conditioned air before it reaches the register. In Greenwood Village’s large homes with finished basements, that often means long runs through unconditioned ceiling cavities. We install foil-faced fiberglass insulation or replace degraded wrap, sealing first, insulating second. Typical insulation work runs $400-$900 per zone for accessible trunk lines.
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 Greenwood Village
Our trucks stock parts and equipment from Nikro, Honeywell, and Aprilaire - brands with published specifications homeowners can verify independently. We don’t ask you to trust our word on performance; we name what we use so you can look it up. For Greenwood Village’s larger homes with complex zoning, we carry Honeywell airflow verification tools to confirm seal integrity after the work is done, not just visually. Parts availability means most repairs finish in one visit. If your system uses Abatement Technologies or Guardsman components, we service those too - just mention it when you call.
Common Duct Repair & Sealing Problems We See in Greenwood Village Homes
- Mastic failure at distant takeoffs. In a 4,500-square-foot home off Yosemite Street, the mastic looked intact at the air handler but had cracked at every takeoff past the third branch. The finished basement ceiling hid the leaks until we pressurized the system and measured airflow loss at the registers. We re-sealed the full trunk line under negative pressure with HEPA containment.
- Fiberglass liner degradation in 1970s-80s metal trunks. The liner sheds if disturbed improperly. On a call near the Denver Tech Center, our camera showed liner fragments collecting at low points in the duct. We adjusted negative pressure, agitated gently, and verified intact liner before re-sealing - then documented it all in the photo record.
- Horse-lot contamination bonding to failing seals. Greenwood Village’s horse-keeping ordinance, preserved since incorporation, means many duct repair calls here involve return trunks packed with hay chaff, equine dander, and sandy paddock grit - a contamination profile that simply doesn’t exist in neighboring Centennial or Lone Tree. That fibrous debris bonds to failing flex duct collars and mastic joints differently than ordinary household dust, which changes both how we prep a seal and how long the job realistically takes. We quote extra time on these jobs because the debris consistency is denser and more fibrous than typical household dust.
- Altitude-driven flex joint cracking. At 5,600 feet, Greenwood Village’s chronically low humidity accelerates cracking of flex duct joints and mastic seals faster than in lower-elevation suburban markets. Seals rated for standard Denver metro spec often fail prematurely here. We specify materials rated for the dry swing.
Pricing for Duct Repair & Sealing in Greenwood Village, CO
Here’s what duct repair and sealing actually costs in this market:
| Service | Typical Range in Greenwood Village |
|---|---|
| Mastic sealant re-seal, single zone | $850 - $1,400 |
| Mastic sealant, multi-zone with fiberglass-lined trunk | $1,200 - $2,100 per system |
| Flex duct repair (single run) | $180 - $340 |
| Flex duct re-run (full zone) | $600 - $1,100 |
| Metal trunk repair with liner preservation | $1,100 - $2,400 per system |
| Duct insulation (per zone, accessible) | $400 - $900 |
Three factors move these numbers: access (crawl space vs. finished basement ceiling), contamination level (horse-lot debris requires more prep), and system count. A 6,000-square-foot home with three zones gets three separate written prices - not one vague estimate with a multiplier buried in the fine print. Haven Standard Clause 1: the price is written, agreed, and fixed before work starts. Bring a competitor’s written estimate and we’ll put our number next to it - free second opinion, no obligation.
We Also Serve Cities Near Greenwood Village
Our crews work throughout the metro area. If you’re in Denver, Englewood, Thornton, or Aurora and need documented duct repair with written upfront pricing, we cover those markets too. The same equipment roster, the same photo record standard, the same 365-Day Done Right Promise applies.
Serving Greenwood Village, CO - Our Local Coverage Area
We’re based in the Greenwood Village 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 Greenwood Village
Each zone is a separate scope with its own written price. A three-zone home gets three distinct quotes, because the duct layout, access, and contamination level vary by system. One zone might need only mastic touch-up at $950; another might need full flex re-run plus trunk re-seal at $2,200. We inspect all three, write all three prices, and you choose which to proceed with. Call (720) 799-2292 to schedule - estimates are free.
Yes, and we account for it specifically. Hay chaff, equine dander, and sandy paddock grit drawn through ground-level returns bonds to mastic and flex collars differently than household dust. The debris is denser and more fibrous. We quote extra prep time, use more aggressive pre-cleaning under negative pressure, and specify sealants rated for that contamination profile. On a multi-zone home off Belleview Avenue near the Denver Tech Center, our tech found a 1980s fiberglass-lined metal trunk whose mastic seals had cracked at every takeoff - the liner was shedding into the supply and return ducts. We set up negative pressure with HEPA filtration, ran agitation tools through the branches, then re-sealed the joints with mastic and re-wrapped the flex runs to the two upper zones. Camera inspection confirmed the liner stayed intact and the system was clean before we buttoned it back up. Call (720) 799-2292 for a written quote that reflects your actual conditions.
You receive a documented photo record of every duct run, before and after, plus written verification of seal integrity. For homeowners who want additional confirmation, we offer post-repair airflow measurement with Honeywell verification tools - the readings are recorded and included in your job record. The 365-Day Done Right Promise means if a seal fails within that window, we return and make it right. That guarantee is in writing, not subject to manager approval.
Increasingly, yes. Western Colorado wildfire seasons push fine ash particulate deep into HVAC systems during summer - a recognized and growing driver of post-smoke-event duct service demand. At Greenwood Village’s altitude, thinner air keeps particles suspended longer, so they penetrate deeper into duct runs and can accelerate degradation of existing mastic and flex seals. If you’ve noticed ash residue at registers or persistent smoke odor after a wildfire event, we inspect seal integrity as part of our assessment. The inspection and written scope are free.
Yes - and the effect is more pronounced in large homes with long runs. In a 5,000-square-foot Greenwood Village home with three zones, leaks at distant takeoffs can reduce effective airflow at registers by 20-30 percent. The system runs longer to hit thermostat setpoints, and the rooms farthest from the air handler stay uncomfortable. Sealing restores designed airflow, reduces runtime, and evens temperatures across zones. We measure before-and-after airflow at key registers when possible, and include those readings in your documented job record. Call (720) 799-2292 to schedule an inspection and written estimate.
Ready to see what’s actually happening inside your ductwork? Call (720) 799-2292. We’ll inspect, photograph, and put a written price in your hand before any work starts - every time, no exceptions.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Greenwood Village since 2013.