Duct Repair & Sealing in Commerce City - Tested First, Written Price Second

Fast, Reliable Duct Repair & Sealing Across Commerce City

Duct repair and sealing in Commerce City, Colorado, typically runs $280-$650 for most residential jobs, with refinery-adjacent homes on the south side often requiring contact degreasing before sealant can properly bond. We’re CleanRun Duct Repair & Cleaning, and our crews serve Commerce City from our Denver office, carrying the equipment to handle both prairie dust infiltration in newer North Range builds and the petrochemical-coated ductwork we find in older homes downwind of the Suncor refinery. Call (720) 513-5159 for a written estimate before any work starts - that’s Haven Standard Clause 1.

Call (720) 513-5159

Why CleanRun Air Duct Cleaning Aurora Is Commerce City’s Preferred Duct Repair & Sealing Company

We’ve been in Commerce City homes since 2013. That’s 52,000+ jobs across the metro area, and enough visits to this city that our technicians recognize the dark, oily film that coats duct walls south of Highway 2 - something you won’t find in Thornton or Aurora at these concentrations.

Our reputation here is documented, not claimed. Every customer receives a photo record of every duct run, before and after, as a standard deliverable. You see what we found, not just what we say we did.

Scheduling is coordinated from our Denver office, with crews dispatched to Commerce City daily. Technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. No exceptions.

We also offer a Free Second Opinion on any written estimate from another company. Bring their quote; we’ll put our number next to it in writing, no charge.

Our Duct Repair & Sealing Services in Commerce City

Duct Sealing

Leaky ductwork in Commerce City wastes 20-30% of conditioned air on average, but the real problem here is what leaks in, not just what leaks out. In the North Range subdivisions, wind-driven prairie dust enters through gaps at plenum connections and register boots, coating blower motors and overloading filters. In south Commerce City, refinery-tainted air seeps into unconditioned spaces through corroded joints. Our sealing process starts with pressure testing to locate leaks, then applies mastic sealant (not tape) to permanent joints for a seal that holds against both dust infiltration and the thermal cycling of Colorado’s high-plains climate.

Flex Duct Repair

Flex duct in Commerce City’s newer homes often fails at the collar connections or sags in attic spaces, creating turbulence that traps debris. The real issue we see: improperly sealed flex returns in North Range homes draw outside air directly through kinked or torn sections, pulling in pollen and fine particulates from the open prairie. We replace damaged sections with properly supported flex, seal all connections with mastic, and photograph the repair for your job record.

Metal Duct Repair

Original sheet-metal ductwork in the 1940s-1970s ranch homes along Highway 2 is our most common Commerce City call. The metal itself is often sound, but joints have corroded internally from decades of mildly acidic industrial air, and the original sealant has dried to dust. Here’s what makes this city’s metal ductwork different: a tacky, oily film from petrochemical particulate bonds to the interior surface. Standard compressed-air blowout won’t touch it. We use direct-contact cleaning with appropriate degreasers before re-sealing with mastic, a scope of work that distinguishes Commerce City jobs from standard Denver suburb calls.

Duct Insulation

Attic ductwork in Commerce City loses efficiency through radiant heat gain in summer and conductive loss in winter. More critically, degraded insulation on flex runs creates a condensation surface in our low-humidity climate - surprising, but temperature differentials at 5,100 feet can still cause sweating on uninsulated metal. We replace or supplement insulation with materials rated for Colorado’s UV and temperature extremes, sealed at all penetration points.

Mastic Sealant Application

Mastic is the only sealant we use on permanent joints - tape fails, and foil tape especially degrades in the temperature swings of unconditioned attic spaces. In Commerce City, mastic application has an added step: surfaces must be clean of oily refinery residue for proper adhesion. We see DIY mastic patches fail within months because the homeowner didn’t know to degrease first. Our protocol removes the film, verifies adhesion, and applies mastic to a prepared surface. The result holds.

Air Leak Repair

Air leaks in Commerce City homes aren’t just energy waste. They’re entry points for the city’s distinctive contamination profile: fine industrial particulates, sulfur compounds, and prairie dust that standard filters don’t catch. We pressure-test the full system, identify leak points with smoke or theatrical fog, and repair with permanent methods - not temporary patches. Every repair is photographed and included in your documented photo record.

Before

After

Trusted Brands We Service in Commerce City

Our equipment roster includes Rotobrush contact-cleaning systems, Nikro negative-pressure extractors, and Honeywell air-quality monitoring tools - brands you can look up independently before agreeing to any price. We stock mastic, flex duct, and collar fittings for common Commerce City system configurations, including the older sheet-metal trunk-and-branch designs found in pre-1980 homes and the flex-heavy builds in North Range. Parts availability means we complete most repairs in a single visit, with no return trip to source materials.

Common Duct Repair & Sealing Problems We See in Commerce City Homes

• Corroded sheet-metal joints in pre-1970s south-side ranch homes leak refinery-tainted air into unconditioned spaces because the original duct sealant has dried and failed. The dark, oily film inside these ducts prevents standard cleaning methods from working and must be removed before any sealing can hold.
• Improperly sealed flex duct in North Range subdivisions draws wind-driven prairie dust and pollen directly into the return, overloading filters and coating the blower motor. The open prairie around these 2000s-era builds creates sustained wind loading that older suburban designs never anticipated.
• Outbuilding and detached-garage HVAC systems on rural properties are commonly overlooked during sealing, creating a lint pathway and pressure imbalance that pulls dust through unsealed boots. These systems need the same sealing attention as the main house, especially when they share a blower or return path.
• DIY mastic patches over oily refinery film fail within months because the residue prevents proper adhesion and must be removed before sealing. We’ve peeled back enough homeowner-applied tape and mastic to know: surface prep is non-negotiable in Commerce City.

Pricing for Duct Repair & Sealing in Commerce City, CO

We Also Serve Cities Near Commerce City

Our crews work throughout the northern metro area, including Duct Repair & Sealing in Commerce City as well as Thornton, Aurora, Denver, and Brighton. Each city’s page details the local conditions that affect pricing and scope - because ductwork in refinery-adjacent Commerce City faces a different contamination profile than what we find in central Denver or the greener subdivisions of Aurora.

FAQs - Duct Repair & Sealing in Commerce City

What to Expect When You Call CleanRun

Every call is answered by a live person, 24/7. We’ll schedule a technician visit to your Commerce City home, conduct a full system inspection with camera documentation, and deliver a written price before any work begins. The technician will be background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews.

Our Duct Repair & Sealing team uses Rotobrush contact-cleaning systems and Nikro negative-pressure extractors, with mastic sealant applied to prepared surfaces for permanent results. Every job concludes with a Documented Photo Record of every duct run, delivered to you as a standard deliverable, not an extra.

Everything is backed by our 365-Day Done Right Promise: if the work is not right, we make it right, in writing on every job. No manager approval required. No “call for a quote” - the price is written, agreed, and fixed before the first panel comes off.

Call (720) 513-5159 for your free, written estimate.

Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Commerce City and the Denver metro area since 2013.