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 Englewood
Duct repair and sealing in Englewood typically costs $280-$650 for most residential jobs, with full-system mastic sealing on older ranch homes running toward the higher end. CleanRun crews are dispatched from our Denver office and serve Englewood neighborhoods directly - we know the local housing stock because we’ve scoped, photographed, and sealed it since 2013. Call (720) 799-2292 for a written estimate before any work starts.
Englewood’s mid-century neighborhoods - from the northwest ranches off South Broadway to the post-war homes near Oxford Avenue and the Belleview corridor - share a common condition: original duct systems that have aged in place while the houses around them changed hands again and again. Our Duct Repair & Sealing team documents every run with before-and-after photography, so you see what we found and what changed.
Why CleanRun Air Duct Cleaning Denver Is Englewood’s Preferred Duct Repair & Sealing Company
We’ve served Englewood homeowners since 2013, and the pattern is consistent: a 1962 ranch near Hampden Avenue with a blower motor working overtime, or a 1950s slab home off South Broadway where the registers in the back bedrooms barely move paper. Our crews know these houses. The stamped-steel trunks, the flex-duct additions from the 1980s, the in-slab plenums that surprise first-time buyers during inspection - we’ve scoped and sealed them all.
Our reputation in Englewood is built on documentation, not claims. Every job receives a written price before work begins, under Haven Standard Clause 1. Every duct run is photographed before and after. The 365-Day Done Right Promise applies in writing, not as a verbal assurance. Background-checked, uniformed technicians arrive identified by name, operating under Haven Standard Clause 3: Verified Crews.
Scheduling and dispatch are coordinated from our Denver office, with crews serving Englewood locally. All calls are answered by a live person, 24/7.
Our Duct Repair & Sealing Services in Englewood
Mastic Sealant
Englewood’s original stamped-steel trunk lines - the backbone of most 1950s-1970s ranch HVAC systems - develop pinhole leaks and separated joints at every elbow and splice. Mastic sealant, a water-based compound we brush onto joints and seams, is the correct repair for metal that is structurally sound but leaking conditioned air into the attic or crawlspace. A typical mastic sealing job on an Englewood ranch trunk line runs $340-$520. We use professional-grade compounds compatible with the temperature cycling these systems see through Colorado’s heating and cooling seasons.
Metal Duct Repair
When the stamped-steel trunk has separated at a longitudinal seam, crushed by a storage box in the attic, or corroded through at a low point, metal duct repair is required before sealing can be effective. In Englewood’s older homes, we regularly find original trunks with two or three damaged sections that have been leaking for years. Repair involves cutting out the damaged section, fabricating a replacement from galvanized sheet metal, and integrating it with mastic-sealed joints. Typical metal duct repair in Englewood: $180-$420 per section, depending on accessibility and whether the plenum connection is involved.
Flex Duct Repair
The flex-duct branches spliced onto Englewood’s original metal trunks - often added during basement finishes or room conversions - trap debris at every connection and tear at the collar points. Kinked runs starve the air handler. Crushed runs dump conditioned air into the crawlspace. Our flex duct repair replaces damaged branches with properly sized, insulated flex duct secured to metal collars with mechanical fasteners and sealed with mastic. In Englewood, flex duct repair typically runs $220-$380 per branch, with whole-house replacement of a failed flex system ranging $1,200-$2,400.
Duct Insulation
Attic ductwork in Englewood’s older homes often carries original insulation that has compressed, torn, or absorbed moisture. We install new fiberglass duct wrap or replace the run entirely with pre-insulated flex duct where appropriate. Duct insulation in Englewood typically adds $160-$290 to a repair job, or $680-$1,100 for full attic trunk insulation.
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 Englewood
CleanRun crews arrive with professional-grade equipment from Rotobrush, Nikro, and Honeywell - tools specified for the negative-pressure extraction and camera scoping that Englewood’s older duct systems require. We stock common repair fittings and mastic compounds locally, so a typical Englewood repair job is completed in one visit without waiting on parts. Equipment is maintained to manufacturer specifications; customers can verify model numbers and capabilities before agreeing to any scope of work.
Common Duct Repair & Sealing Problems We See in Englewood Homes
- Pinhole leaks in stamped-steel trunks. The original trunk lines in Englewood’s 1945-1975 ranches were fabricated from stamped steel with longitudinal seams and spot-welded elbows. After sixty-plus heating seasons, these seams open at the elbows and low points. Conditioned air leaks into the attic or crawlspace; the blower motor compensates by drawing more amps; utility bills climb without explanation.
- Crushed or disconnected flex-duct branches. Flex duct added during later renovations was often strapped too tight, routed around framing without proper support, or simply pulled loose from its collar. In Englewood homes, we regularly find back bedrooms that receive almost no airflow because a flex run has detached entirely inside a finished basement ceiling.
- Degraded fiberglass duct-board lining. Older properties along the South Broadway and Oxford Avenue corridors were built with interior duct-board lining that has degraded with age. The surface erodes, shedding fiberglass particulate directly into the airstream. This is not a cleaning issue; it requires repair or replacement of the affected duct sections.
- In-slab and sub-floor return plenums packed with debris. Northwest Englewood’s post-war ranch stock on slab or shallow crawlspaces was built with concrete trench cavities used as return ducts. Most homeowners don’t know this configuration exists until we scope it. These plenums collect decades of alkaline clay dust, mold, and debris that a standard residential duct-cleaning rig cannot access. Specialized camera and agitation tools are required.
Pricing for Duct Repair & Sealing in Englewood, CO
Honest pricing for Englewood’s market, delivered in writing before work starts:
| Service | Typical Range in Englewood |
|---|---|
| Mastic sealing (metal trunk, typical ranch) | $340-$520 |
| Metal duct repair (per section) | $180-$420 |
| Flex duct repair/replacement (per branch) | $220-$380 |
| Whole-house flex system replacement | $1,200-$2,400 |
| Duct insulation (attic trunk) | $680-$1,100 |
| In-slab/sub-floor plenum remediation | $580-$1,200 |
What moves the number: accessibility (crawlspace vs. full attic), number of damaged sections, whether the plenum connection requires rework, and whether we find degraded duct-board that must be replaced rather than sealed. Every estimate is free, written, and binding under Haven Standard Clause 1. No per-vent pricing. No coupon bait. Call (720) 799-2292 for an exact quote on your system.
We Also Serve Cities Near Englewood
CleanRun crews serve Englewood homeowners directly from our Denver office, with regular work in Littleton, Denver, Aurora, and Arvada as well. Each city’s housing stock presents different duct conditions; our estimates account for local building age, materials, and the specific failure modes common to that area.
Serving Englewood, CO - Our Local Coverage Area
We’re based in the Englewood 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 Englewood
Englewood’s dominant housing stock - 1950s-1970s ranch homes with original sheet-metal trunk lines - has aged in place without the teardown-and-rebuild cycle seen in Cherry Hills Village or newer Centennial. Combined with the Front Range’s alkaline clay dust carried by Chinook wind events and increasingly frequent wildfire smoke infiltration, these aging, poorly sealed duct systems accumulate fine particulate and develop leaks at a rate that distinguishes Englewood from newer-built suburbs. Call (720) 799-2292 for a free inspection and written estimate.
An in-slab or sub-floor return-air plenum is a concrete trench cavity built into the foundation that serves as the return duct, common in northwest Englewood’s post-war slab ranches. Most homeowners discover it only when a technician scopes the system with a camera. If your Englewood ranch was built in the 1950s or 1960s on slab, and you’ve noticed persistent dust or musty airflow even after filter changes, a scope inspection will confirm whether this hidden return path is the source. Call (720) 799-2292 to schedule camera inspection.
Englewood sits at roughly 5,280 feet on the Front Range, where Chinook downslope winds drive fine alkaline clay dust from surrounding arid soils into any duct system with imperfect sealing. Recent metro-wide wildfire smoke events deposit fine ash and ultrafine particulate deep into HVAC systems. This means sealing work in Englewood must address both the mechanical leaks and the particulate loading that accelerates degradation of flex-duct liners and mastic bonds. Our crews use negative-pressure extraction before sealing to remove this debris, not just push it deeper. Call (720) 799-2292 for a scope and written repair plan.
Yes. CleanRun’s duct repair and sealing procedures align with NADCA ACR standards for assessment, cleaning, and restoration of HVAC systems. Our documented photo record - included on every visit - provides the visual verification that NADCA-recommended post-job documentation requires. The 365-Day Done Right Promise backs the work in writing. Call (720) 799-2292 to review our full scope and warranty documentation.
Individual flex duct branches with localized damage - torn collars, kinked sections, or failed insulation - can often be repaired by replacing the damaged section and properly securing it to a metal collar with mechanical fasteners and mastic. However, when multiple branches show the same degradation pattern, or when the original splicing was done without proper collars, wholesale replacement of the flex system produces a more durable result. In Englewood’s older homes, we typically find that flex branches added in the 1980s-1990s have reached end of useful life and recommend replacement. Call (720) 799-2292 for camera inspection and written options.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Denver, serving Englewood since 2013.