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
Most duct sealing jobs in Englewood run $340-$780 for a whole-system repair on a typical single-family home, and we deliver a written price before any panel comes off. Our crews coordinate dispatch from the Denver office and carry equipment for both standard and retrofitted ductwork, so we’re familiar with the specific problems Englewood’s postwar housing stock presents.
We serve the full Englewood area, from the ranch homes near Belleview Park to the condo buildings along South Broadway and the bungalows tucked behind Santa Fe Drive. Every job starts with a camera inspection, finishes with a Documented Photo Record of every duct run, and is backed by our 365-Day Done Right Promise in writing. Call (720) 315-7291 to schedule a free estimate.
Why CleanRun Air Duct Cleaning Littleton Is Englewood’s Preferred Duct Repair & Sealing Company
We’ve been working in Englewood since 2013, and the patterns are consistent: original sheet metal ducts in 1950s and 1960s ranches that have never been professionally sealed, crawl-space runs separated at the joints, and hybrid trunk lines from octopus-furnace retrofits that standard equipment can’t navigate. Our Duct Repair & Sealing team has documented these conditions in hundreds of Englewood homes, and we bring camera-equipped agitation tools specifically for irregular geometry.
Our reputation here is built on what we can show, not claim. Every customer receives before-and-after photos of every duct run, a written scope of work, and a written price agreed to before work starts - Haven Standard Clause 1. We’re independently owned and operated under the Haven Standard, with background-checked, uniformed technicians identified by name before arrival. A Free Second Opinion on any written estimate is available at no cost.
Calls are answered by a live person, 24/7, and scheduling to Englewood is typically within a few business days. We don’t do urgency theatre - duct sealing is a scheduled job, and we prefer to do it right rather than fast.
Our Duct Repair & Sealing Services in Englewood
Mastic Sealant Application
Mastic is a water-based paste that hardens into a permanent, flexible seal at duct joints and seams - we apply it by brush at every connection point after cleaning and prep. In Englewood’s 1945-1970 ranches, we find mastic is often the only reliable way to seal original sheet metal trunk lines that have worked loose from decades of thermal expansion and contraction, especially in crawl spaces where temperature swings are extreme. A typical mastic sealing job for a whole-system repair in Englewood runs $340-$580.
Metal Duct Repair
Original galvanized steel ductwork in Englewood’s mid-century homes corrodes at the seams, gets crushed by pest activity in crawl spaces, and separates where support straps have failed. We repair or replace damaged sections with matching gauge metal, seal with mastic and fiberglass mesh, and photograph every connection. Metal duct repair in Englewood typically costs $180-$420 per section, depending on accessibility and extent of damage.
Air Leak Repair
Leak detection starts with a camera inspection and static pressure test - we pressurize the system and trace losses to their source. In Englewood, the most common leak points are at the plenum (the main distribution box attached to your furnace), at transitions between original octopus-era trunk lines and added branch runs, and where flex duct has pulled free of metal collars. Whole-system air leak repair with full sealing runs $480-$780 in the Englewood market.
Flex Duct Repair
Flex duct - the insulated flexible tubing common in additions and retrofits - collapses, tears, or disconnects at its collar connections. We replace damaged runs with new insulated flex, secure with mechanical fasteners and mastic, and verify airflow at the register. Flex duct repair in Englewood homes typically runs $140-$280 per run.
Duct Insulation
Uninsulated or degraded duct insulation in Englewood crawl spaces and attics wastes conditioned air and creates condensation issues. We install new foil-faced fiberglass insulation or closed-cell foam wrap, sealed at all seams. Duct insulation for a typical Englewood ranch runs $260-$520 depending on linear footage and access.
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
We carry professional-grade equipment from Nikro, Honeywell, and Abatement Technologies - brands you can look up independently before agreeing to any work. Our Nikro negative-pressure extraction systems handle the irregular geometry of Englewood’s retrofitted octopus-furnace trunk lines, while Honeywell and Abatement Technologies air quality components integrate with sealed duct systems for whole-house filtration upgrades. We stock common repair parts locally, so most Englewood jobs don’t wait on ordered components.
Common Duct Repair & Sealing Problems We See in Englewood Homes
- Crawl-space joint separation in postwar ranches. Duct runs in 1945-1970 Englewood homes sit in unconditioned crawl spaces where freeze-thaw cycles and ground moisture corrode hangers and loosen joints. Fine Front Range silt gets pulled into these gaps under negative pressure, silently fouling the system and reducing airflow to registers.
- Retrofitted octopus-furnace hybrid geometry. A significant number of Englewood’s mid-century ranches were originally heated with gravity ‘octopus’ furnaces, then later retrofitted with forced-air systems, producing hybrid duct runs - oversized original trunk lines awkwardly tied into newer branch runs - that require camera inspection and agitation tools to seal correctly. This retrofit pattern is far more common inside Englewood’s 3.4 square miles than in the uniformly newer housing of surrounding suburbs.
- Shared dryer vent stacks in multi-unit buildings. Englewood’s denser apartment and condo developments, particularly along South Broadway and near the Englewood Civic Center, often route dryer exhaust through shared vertical stacks. Lint accumulates deep in the run where it can’t be seen, and because the stack serves multiple units, a single neglected unit endangers the whole column with fire risk and back-drafted moisture.
- Crushed or disconnected branch runs from pest intrusion. Original flex duct and even thin-gauge metal in Englewood crawl spaces gets damaged by rodents seeking nesting material, especially where foundation vents have deteriorated. We regularly find completely detached branch runs blowing conditioned air into crawl spaces instead of bedrooms.
Pricing for Duct Repair & Sealing in Englewood, CO
Here’s what duct repair and sealing actually costs in Englewood’s market:
| Service | Typical Range |
|---|---|
| Mastic sealant, whole system | $340 - $580 |
| Metal duct repair, per section | $180 - $420 |
| Air leak repair with full sealing | $480 - $780 |
| Flex duct repair, per run | $140 - $280 |
| Duct insulation | $260 - $520 |
These are whole-system or per-item prices, not per-vent teaser rates. Every quote is delivered in writing before work starts - Haven Standard Clause 1 - and includes the Documented Photo Record as a standard deliverable. Factors that move the price: accessibility (crawl space vs. basement), extent of damage found during camera inspection, and whether we’re working with standard or retrofitted octopus-furnace geometry. Call (720) 315-7291 for a free estimate with exact numbers for your home.
We Also Serve Cities Near Englewood
Our crews work throughout the metro area, including Duct Repair & Sealing in Englewood and neighboring Littleton, Denver, Aurora, and Wheat Ridge. Dispatch and scheduling are coordinated from our Denver office, with local crews serving each 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
Yes, in most cases original sheet metal ducts can be sealed rather than replaced, provided the metal itself isn’t corroded through or structurally collapsed. We see this constantly in Englewood’s 1945-1970 housing stock: the metal is sound, but joints have worked loose and mastic has dried out. A camera inspection tells us whether sealing is viable or if section replacement is needed. Call (720) 315-7291 and we’ll put it in writing.
Restricted airflow from lint accumulation in a shared dryer vent stack is the most common cause in Englewood’s multi-unit buildings. The stack serves multiple units, so lint from upstairs neighbors compounds your own, and the restriction builds slowly enough that residents adapt without realizing the fire risk. We clean the full stack length with rotary brushes and negative-pressure extraction, then document the before-and-after with photos. If your building management hasn’t scheduled this, we can provide a written scope for their review.
We need curbside parking within 75 feet of the building entrance for our service van, which carries a Nikro negative-pressure extraction unit and rotary brush equipment. In Englewood’s denser multi-unit buildings near South Broadway or the Civic Center, we coordinate with property management for loading zone access or reserved parking. We don’t block fire lanes or resident spaces. If your building has restricted access, mention it when you call (720) 315-7291 and we’ll note it for the crew.
An octopus furnace was a gravity heating system - no blower, just hot air rising through large ducts - common in Englewood homes built before forced-air became standard. When these homes were retrofitted with modern HVAC, contractors often tied smaller branch runs into the oversized original trunk lines, creating irregular transitions that standard cleaning and sealing equipment can’t navigate. The geometry hides leaks at the oversized-to-standard connections, and only camera inspection and specialized agitation tools can reach and seal them properly. This pattern is concentrated in Englewood’s tight 3.4-square-mile footprint of postwar construction.
Yes - we access crawl-space ductwork through the existing crawl space opening, not through your floors. In Englewood’s 1950s and 1960s ranches, the crawl space is typically accessible through a foundation vent or small hatch, and we work the full system from below. If your crawl space has been sealed or converted to conditioned space, we adjust our access plan accordingly. The camera inspection shows us the layout before we start, so there are no surprises. Call (720) 315-7291 for a free estimate.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Littleton, serving Englewood since 2013.