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 Westminster
Duct repair and sealing in Westminster typically costs between $340 and $890 for most residential jobs, with full-system sealing on older homes running toward the higher end. Our crews are dispatched from the Denver office and carry sheet-metal stock, mastic sealant, and flex duct inventory sized for Westminster’s housing stock. Call (720) 799-2292 for a written estimate before any work starts.
We’ve worked Westminster’s neighborhoods since 2013, from the original ranch homes along US-36 to the newer builds in Bradburn and Legacy Ridge. That range matters. A 1985 tract house near 92nd Avenue with drywall return chases and fraying fiberglass duct board needs a fundamentally different approach than a 2019 build with modern flex duct. We bring the right materials and the right expectations for what we’ll find.
Why CleanRun Air Duct Cleaning Denver Is Westminster’s Preferred Duct Repair & Sealing Company
Westminster homeowners research before they call. They should. Our Duct Repair & Sealing team has served over 52,000 homes since 2013, every one with a written price delivered before work began and a documented photo record delivered after. Tomas Reyes built this practice on the premise that a customer should see what was in their ducts before deciding what to do about it.
Our Westminster customers receive the same deliverables as every other job: before-and-after photos of every duct run, a written scope of work signed off before we start, and the 365-Day Done Right Promise backed in writing. Haven Standard Clause 1 requires that written price. No exceptions.
Crews are background-checked and uniformed under Haven Standard Clause 3: Verified Crews. The technician’s name arrives by text before the truck does. Equipment on Westminster jobs includes Rotobrush agitation systems, Nikro negative-pressure extractors, and Honeywell filtration components - brands any homeowner can look up and verify.
We know the local conditions. Westminster’s semi-arid climate, its position on the Front Range with open Adams County land to the north, and its concentration of 1970s-1990s housing stock create repair scenarios we see repeatedly. That familiarity saves time and prevents the rework that comes from treating every house like a generic suburban system.
Our Duct Repair & Sealing Services in Westminster
Duct Sealing
Leaky ducts in Westminster homes waste 20-30% of conditioned air on average, according to Department of Energy estimates. In our market, the problem is worse than the national baseline. Prairie dust from open land north and east of the city infiltrates through loose joints, and wildfire smoke particulate slips in the same gaps. We seal with mastic compound and foil-backed tape rated for temperature cycling, then verify with a pressure test. A typical duct sealing job in Westminster runs $340-$620 for a single system, depending on access and linear footage.
Flex Duct Repair
Flex duct in Westminster’s older homes - the ribbed plastic-and-wire tubing common in 1980s and 1990s construction - degrades at connection points. The collars loosen, the insulation sags, and the inner liner tears where it bends around framing. In newer Westminster neighborhoods like Legacy Ridge, we’ve found flex duct compromised by construction debris left in the line during original build-out. We replace damaged sections with new flex duct sized to the original CFM load, secure with mechanical fasteners (not tape alone), and seal with mastic. Flex duct repair in Westminster typically ranges from $180-$450 per run.
Metal Duct Repair
Sheet metal ductwork in Westminster’s newer construction holds up better but fails at seams and where branches split from the main trunk. We see this in Bradburn and similar master-planned communities. Our crews cut out corroded or separated sections, fabricate replacement pieces from galvanized stock, and seal with mastic. Metal repair runs $280-$580 per section in Westminster, with plenum rebuilds at the higher end.
Duct Insulation
Under-insulated ducts in Westminster’s unconditioned attics and crawl spaces lose heat rapidly during Chinook-driven cold snaps and gain it during summer peaks. We install foil-faced fiberglass wrap or closed-cell foam where appropriate, sealed at all seams. Insulation work in Westminster homes averages $420-$780 for a full system, depending on accessibility.
Mastic Sealant
Mastic is the standard we apply on every Westminster sealing job. It’s a thick, fiber-reinforced compound brushed onto joints and seams, then cured to a flexible seal. Unlike tape, it doesn’t dry out or peel in Westminster’s low-humidity climate. We specify mastic by brand - Guardsman and Abatement Technologies products are our typical stock - and apply it to manufacturer’s thickness. This is not an upsell. It’s the correct way to seal ductwork.
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 Westminster
Our Westminster trucks carry professional-grade equipment from Rotobrush, Nikro, Honeywell, and Aprilaire. We stock mastic sealant, flex duct, sheet metal fittings, and register boots sized for the systems we encounter most often in this market. That inventory means we don’t make two trips. The homeowner gets a single visit, a written price before we start, and a completed job with photos to document it. Equipment is maintained to manufacturer specification and logged under Haven Standard Clause 5: Verified Tools.
Common Duct Repair & Sealing Problems We See in Westminster Homes
- Fiberglass duct board plenums shedding glass fibers. Westminster’s 1970s-1990s homes frequently have original fiberglass duct board at the air handler. The material frays internally, releasing fibers into supply air. Standard cleaning can’t fix this - the board must be sealed or replaced.
- Drywall return chases with no metal liner. Along the US-36 corridor, our crews regularly open return-air chases framed into wood-stud walls where drywall itself forms the duct surface. Decades of dust, drywall particulate, and fiberglass accumulation require access cuts and specialized sealing, not standard vacuum equipment.
- Loose flex duct joints compromised by prairie dust and wildfire ash. Fine particulate from Adams County open land and Front Range fire seasons infiltrates through gaps at registers and joints, accelerating degradation and reducing indoor air quality regardless of filtration upgrades.
- Construction debris in newer systems. Homes in Bradburn, Legacy Ridge, and similar northwest Westminster communities often have flex duct loaded with drywall scraps, wood chips, and fastener debris from original construction - contamination that standard HVAC filters never address.
Pricing for Duct Repair & Sealing in Westminster, CO
We publish ranges because Haven Standard Clause 1 requires a written price before work starts. Here is what duct repair and sealing costs in Westminster’s market:
| Service | Typical Range in Westminster |
|---|---|
| Duct sealing (single system, mastic) | $340 - $620 |
| Flex duct repair (per run) | $180 - $450 |
| Metal duct repair (per section) | $280 - $580 |
| Duct board plenum rebuild/seal | $520 - $890 |
| Drywall chase access, clean, and metal liner install | $680 - $1,240 |
| Duct insulation (full system) | $420 - $780 |
These ranges reflect Westminster’s housing stock, access conditions, and the specialized work required for drywall-as-duct configurations. Every estimate is free, written, and delivered before any work begins. Bring a competitor’s quote and we’ll provide a free second opinion in writing under Haven Standard Clause 2.
We Also Serve Cities Near Westminster
Our crews work Duct Repair & Sealing in Westminster and surrounding communities including Arvada, Thornton, Broomfield, and Aurora. Dispatch and scheduling are coordinated from our Denver office. Each city gets the same documented photo record, written pricing, and 365-Day Done Right Promise.
Serving Westminster, CO - Our Local Coverage Area
We’re based in the Westminster 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 Westminster
Every 3-5 years for Westminster homes on or near open land, and every 2-3 years if the home has experienced significant wildfire smoke intrusion. The 2020 fire season demonstrated that fine ash penetrates standard filtration and deposits in ductwork, creating a measurable loading that accelerates system wear. After sealing work, we recommend MERV-13 or higher filtration to extend that interval. Call (720) 799-2292 and we’ll assess your specific exposure.
Yes, but it requires access cuts and installation of a sheet-metal liner, not standard sealing methods. Drywall chases along the US-36 corridor were built without metal ductwork, so mastic alone has no proper surface to adhere to. We cut access openings, remove accumulated debris with negative-pressure HEPA extraction, install a metal liner, and seal with mastic to NADCA standards. The homeowner receives before-and-after photos of the chase interior.
Fiberglass duct board degrades internally after 30-40 years of thermal cycling and airflow abrasion. Westminster’s dry climate accelerates surface embrittlement. Cleaning removes loose debris but doesn’t restore the board’s structural integrity. We seal or replace the plenum with sheet metal, depending on deterioration extent. A sealed or rebuilt plenum stops fiber release permanently.
Significantly, but only as part of a system approach. Sealing supply and return joints prevents the pressure-driven infiltration that pulls outdoor particulate into ductwork. However, sealing must be paired with source removal (cleaning existing deposits) and upgraded filtration (MERV-13 or better) to address smoke that enters through building envelope gaps. We evaluate all three components during our estimate.
Yes. Properties on the northern and eastern edges of Westminster, particularly those near open Adams County land, often have shop or barn HVAC systems with the same dust-loading issues as the main house. We bring portable negative-pressure equipment and stock flex duct and mastic for these smaller systems. Written pricing applies to outbuilding work as well - no exceptions. Call (720) 799-2292 to schedule.
What Westminster Homeowners Receive on Every Job
- Written price before any work starts - Haven Standard Clause 1
- Documented Photo Record of every duct run, before and after
- 365-Day Done Right Promise, backed in writing
- Background-checked, uniformed technician identified by name before arrival
- Free Second Opinion on any competitor’s written estimate
- Equipment from Rotobrush, Nikro, Honeywell, Aprilaire, and Guardsman - verifiable brands
Call (720) 799-2292 for a free written estimate. Tomas Reyes and the team at CleanRun will show you what’s in your ducts before you decide what to do about it.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Westminster since 2013.
Duct Repair & Sealing in Nearby Areas
