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, CO typically costs $280-$740 for most residential jobs, with full system replacements running $1,800-$3,200 when original 1980s-1990s duct board has reached end of life. We dispatch crews to Westminster from our Denver coordination office, and most appointments are scheduled within 2-4 business days. Call (720) 315-7291 for a written estimate before any work starts.
We’ve worked inside Westminster homes since 2013, and the pattern is consistent: the fiberglass duct board installed during the city’s 1978-1998 build-out has exceeded its 25-30-year service rating. The material delaminates. It sheds glass fibers into the air stream. Homeowners call us for “a cleaning” and we find the duct itself is the problem. Our Duct Repair & Sealing team documents everything with before-and-after photos of every run, delivered as part of the standard job record.
Why CleanRun Air Duct Cleaning Littleton Is Westminster’s Preferred Duct Repair & Sealing Company
Westminster homeowners research before they call. They should. The duct cleaning industry runs on $79 coupons and shop-vac noise, and the final invoice rarely matches the teaser. We operate under the H.A.V.E.N. Standard. Haven Standard Clause 1 requires a written price before any work starts - every job, no exceptions. You will not find “call for a quote” on this page because that phrase does not exist in our process.
Our documented photo record is included on every visit. The camera shows what was actually found: a 3-inch debris build-up at the first elbow, a crushed flex section bypassing the filter, delaminating duct board releasing fibers at the plenum connection. You see it. We name it. Then we name the price to fix it.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise is backed in writing on every job, not stated in marketing copy and buried when something goes wrong. If the work is not right, we make it right.
We serve Westminster alongside our broader metro coverage. Dispatch and scheduling are coordinated from our Denver office; crews serve Westminster locally with equipment from Nikro, Honeywell, and Abatement Technologies - brands you can look up independently before agreeing to any price.
Our Duct Repair & Sealing Services in Westminster
Duct Sealing with Mastic Sealant
Westminster’s double particulate load - prairie dust from the eastern plains, wildfire smoke from the foothills - pushes HVAC systems harder than cities just 10 miles away. Leaky duct connections in unconditioned crawlspaces pull that loaded air directly into the system, bypassing the filter entirely. We apply mastic sealant (a fiber-reinforced water-based compound, not tape) to every joint and seam after camera verification. In the Walnut Creek and Standley Lake neighborhoods, we regularly find original builder-grade tape dried and peeling; the metal underneath is sound, but the seal is gone. Mastic fills gaps up to 1/8 inch and remains flexible through Colorado’s temperature swings. Typical mastic sealing for a Westminster ranch or two-story runs $280-$450 for accessible basement or crawlspace systems.
Flex Duct Repair
Newer western Westminster developments near Standley Lake use complex flex-duct runs with multiple bends and sags. The inner liner tears at supports. The insulation jacket compresses. The connection to the register boot gaps open, and the blower motor pulls crawlspace air - dust, rodent debris, ash - straight into the living space. We replace damaged flex sections with new insulated duct, support it properly to prevent future sags, and seal the connections with mastic and mechanical fasteners. A single flex run replacement in Westminster typically runs $180-$340; multiple runs or attic access adds labor. We photograph the damage before touching anything.
Metal Duct Repair
Some Westminster homes, particularly those with later additions or custom builds in the far western areas, use galvanized steel trunk lines. The metal itself lasts, but the longitudinal seams leak, take-off connections loosen, and rust forms where condensation collects at low points. We re-seal seams with mastic, replace corroded sections with matching gauge steel, and re-insulate to prevent future condensation. Metal repair runs $320-$580 in most Westminster homes, depending on access and extent.
Duct Insulation
Westminster’s semi-arid climate drops relative humidity to 15-25% regularly, but the real insulation killer is summer attic heat. Unconditioned attic ductwork in Westminster’s 1980s-1990s stock often carries R-4 or R-6 insulation that has compressed, torn, or absorbed moisture over decades. We replace with R-8 fiberglass wrap or closed-cell foam insulation, sealed with vapor barrier jacketing. Proper insulation prevents condensation in shoulder seasons and maintains delivered air temperature. Attic re-insulation of a full trunk line in Westminster typically runs $480-$720.
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 equipment roster includes professional-grade tools from Nikro, Honeywell, Aprilaire, and Abatement Technologies - brands recognized in the HVAC trade for negative-pressure extraction systems, HEPA containment, and precision airflow measurement. We stock common flex-duct diameters, mastic compounds, and insulation materials for Westminster jobs, so most repairs don’t wait on parts. If your system uses Honeywell electronic air cleaners or Aprilaire media filters, we inspect the integration with your ductwork as part of the repair scope and note any compatibility issues in the written estimate.
Common Duct Repair & Sealing Problems We See in Westminster Homes
- Delaminating fiberglass duct board in 1980s-1990s subdivisions. The material is past its 25-30-year rating. The fiberglass matting separates from the foil facing, releasing glass fibers into the air stream. Cleaning won’t fix this - the duct board itself needs replacement.
- Sagging flex-duct runs in Standley Lake-area homes. Poor original support lets the duct belly between joists. Debris collects in the low point. The inner liner tears. The system loses airflow and pulls unfiltered crawlspace air through gaps at the connections.
- Electrostatic particulate cling from Westminster’s low humidity. At 15-25% relative humidity, fine particles - prairie dust, pollen, wildfire ash - cling to duct walls with static charge. Ordinary register-level cleaning can’t remove it without source removal and agitation tools like Rotobrush mechanical contact cleaning.
- Smoke infiltration through leaky connections during wildfire events. Homeowners keep windows closed, but the air handler pulls smoke-laden air through gaps in unconditioned crawlspaces. We find gray-black ash in ducts years after the Marshall Fire, particularly in homes near Walnut Creek with pier-and-beam foundations.
Pricing for Duct Repair & Sealing in Westminster, CO
| Service | Typical Range in Westminster |
|---|---|
| Mastic sealing of accessible joints (basement/crawlspace) | $280-$450 |
| Single flex-duct run replacement | $180-$340 |
| Metal duct repair (seam re-sealing, section replacement) | $320-$580 |
| Attic trunk line re-insulation (R-8) | $480-$720 |
| Full duct board replacement (typical 1,600 sq ft home) | $1,800-$3,200 |
| Written estimate, camera inspection, photo record | No charge |
These are whole-system prices, not per-vent teases. What drives the number: access (crawlspace vs. basement vs. attic), material type (flex, metal, or duct board), and whether we’re sealing sound material or replacing failed substrate. Every estimate includes the written scope, the price, and the 365-Day Done Right Promise before any work begins. Bring a competitor’s written quote - we provide a Free Second Opinion, our number next to theirs.
On a ranch home near Walnut Creek, our tech pulled gray-black fine ash from the supply and return ducts years after the Marshall Fire smoke - the homeowner had kept the windows closed but the air handler kept pulling smoke through leaky connections in an unconditioned crawlspace. We camera-inspected the run, replaced the crushed flex section with metal, then mastic-sealed the remaining joints and re-insulated the trunk line, restoring negative pressure and cutting the particulate load at the registers.
We Also Serve Cities Near Westminster
Our crews work throughout the northern and western metro, including Duct Repair & Sealing in Westminster and surrounding communities: Arvada to the west, Wheat Ridge to the south, Golden to the southwest, and Aurora to the east. The same H.A.V.E.N. Standard, written pricing, and documented photo record apply in every city.
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
You likely need repair, not just cleaning. Westminster’s 1990s tract homes were fitted with fiberglass duct board rated for 25-30 years; that material is now 30-35 years old and actively delaminating in many systems. The camera will show whether the substrate is sound (cleaning helps) or shedding fibers (replacement is the fix). Call (720) 315-7291 for a free camera inspection and written estimate.
Your HVAC return system pulled smoke-laden air through leaky duct connections in unconditioned crawlspaces or attic spaces the entire time. Windows closed doesn’t mean the building envelope was sealed. In Westminster’s Standley Lake and Walnut Creek neighborhoods, we regularly find gray-black fine ash in duct interiors years after fire seasons - the particulate entered through gaps at boots, plenum connections, and crushed flex sections. Sealing those leaks is what stops recontamination.
It changes what we find, not how we work. At 15-25% relative humidity, fine particulates cling electrostatically to duct walls rather than settling. This means source removal requires mechanical agitation - brushes, whips, contact cleaning - not just vacuum pressure. The low humidity also means mastic sealant cures faster, which is neutral to slightly favorable. The real Westminster difference is the double particulate load, not the humidity itself.
Sagging, crushing, and connection gaps. The complex runs in newer developments near Standley Lake develop low points where debris accumulates and the inner liner tears. Support straps loosen. The connection to the register boot gaps open, bypassing the filter. We replace the damaged section, re-support the run with proper pitch, and seal with mastic - not tape.
We use two methods: visual (camera inspection of every run, before and after, photos delivered to you) and pressure-based (measuring static pressure and airflow at the air handler and registers against manufacturer specifications). The photo record is included on every visit as a standard deliverable. If pressure readings don’t meet spec, we re-open the work under the 365-Day Done Right Promise. Haven Standard Clause 1: written price before work. Clause 6: documented verification after.
Ready to see what’s actually inside your Westminster ductwork? Call (720) 315-7291 for a free written estimate. We’ll camera-inspect the system, name the price to fix what we find, and deliver a documented photo record when the crew leaves - backed by the 365-Day Done Right Promise in writing.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Westminster since 2013.