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 Cumming
Duct repair and sealing in Cumming typically costs $280-$650 for most residential jobs, with full-system flex duct replacement in larger two-story homes running $1,200-$2,400. We dispatch crews to Cumming from our Atlanta coordination office, and most repair appointments are scheduled within 3-5 business days. Call (678) 693-5322 for a written estimate before any work starts.
We’ve been working in Cumming since 2013, and the pattern here is distinct from anywhere else in metro Atlanta. The subdivision boom along SR-400 produced thousands of large homes built fast, with framing crews and HVAC contractors often working the same house on the same day. That speed left construction debris inside duct systems that homeowners are only now discovering 15-20 years later. Our Duct Repair & Sealing team knows these homes because we’ve opened hundreds of them.
Why CleanRun Air Duct Cleaning Cumming Is Cumming’s Preferred Duct Repair & Sealing Company
CleanRun has completed work in Cumming subdivisions from Windermere to the Lake Lanier shoreline, and our documented photo record is included on every visit - inside every duct run, before and after, delivered as part of the standard job record. Homeowners here don’t have to take our word for what was found; the camera shows it.
Our crews are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. Tomas Reyes established this practice when CleanRun opened in 2013, and it hasn’t changed. Every job starts with a written price agreed before a single panel comes off, and every job ends with the 365-Day Done Right Promise backed in writing.
We answer calls with live people, 24/7, and scheduling is coordinated from our Atlanta office with local crews serving Cumming directly. No “call for a quote” - we put the number in writing, on site, before work begins. Haven Standard Clause 1.
Our Duct Repair & Sealing Services in Cumming
Duct Sealing with Mastic Sealant
In Cumming’s 2000-2015 subdivisions, loose boot connections at register cans leak conditioned air into attics and wall cavities. We seal these gaps with professional-grade mastic sealant, not tape that dries and fails. The mastic is brushed onto joints and boot connections, then cures to a flexible, permanent seal that holds through Georgia’s humidity cycles. In Lake Lanier lakeside homes, this matters more - any gap that lets unconditioned attic air infiltrate keeps duct lining damp long enough for mold to colonize.
Flex Duct Repair
Builder-grade flex duct in Cumming’s rapid-build era sags and kinks at sharp turns, collapsing the inner liner and choking airflow to second-floor registers. We see this constantly in Windermere and along the SR-400 corridor: flex runs that were never properly supported, now drooping between joists with crushed interiors. Our crews replace damaged flex sections with properly sized, supported runs using professional-grade materials. We photograph the sagging runs before touching them and the supported replacements after.
Metal Duct Repair
Where Cumming homes have galvanized metal trunk lines - more common in higher-end builds near Lake Lanier - we repair separated seams, corroded sections, and failed dampers. Metal duct in this climate suffers from condensation at uninsulated joints, particularly in homes where the original builder skipped proper wrapping. We repair the metal, then insulate to prevent recurrence.
Duct Insulation
Uninsulated or degraded duct insulation in Cumming attics wastes energy and creates condensation points. We replace insulation with materials rated for Georgia’s humidity, sealed at all seams. This is particularly important in Cumming’s larger two-story homes with long attic runs, where temperature differential between conditioned air and attic air is extreme.
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 Cumming
CleanRun crews carry professional-grade equipment from Rotobrush, Nikro, and Guardsman - brands any homeowner can look up independently to verify specifications. We stock common repair parts for Cumming’s most prevalent systems, including flex duct connectors, mastic compounds, and insulation wraps, so most repairs are completed in a single scheduled visit without waiting on parts orders. Our negative-pressure extraction systems are manufactured by Abatement Technologies, and we use Honeywell air quality monitors to verify system performance before signing off.
Common Duct Repair & Sealing Problems We See in Cumming Homes
- Original construction debris still packed in the plenum. In Cumming’s 2000s-era subdivisions, framing and HVAC crews worked simultaneously, blowing red Georgia clay dust and drywall particulate into duct boots before registers were installed. We routinely pull registers in 15-year-old homes and find this material still compacted at the bottom of the plenum, untouched since move-in day. Every time the blower cycles, some of it recirculates.
- Sagging flex duct with collapsed inner liners. The builder-grade flex used in Cumming’s rapid-build era was often unsupported across long attic spans. Gravity and attic heat have caused these runs to sag, kink, and collapse internally - particularly at elbows leading to second-floor registers. The result is weak airflow upstairs and overworked HVAC equipment.
- Loose boot connections leaking conditioned air into attics. The connection between flex duct and register boot was often secured with inadequate fasteners or tape that has since dried and failed. In Cumming’s humid climate, these leaks pull unconditioned attic air into the system, raising humidity levels inside the ductwork and creating conditions for mold growth - especially in lakeside subdivisions.
- Air-sealing gaps allowing Lake Lanier humidity to infiltrate. Homes near the lake experience persistently elevated humidity compared to inland Forsyth County. Any gap in duct sealing - at plenum joints, boot connections, or access panels - lets this moisture-laden air enter the system. The duct lining stays damp longer, and mold colonizes faster than in drier microclimates just a few miles north.
Pricing for Duct Repair & Sealing in Cumming, GA
Most Cumming homeowners pay between $280 and $650 for standard duct repair and sealing work. Specific ranges we see in this market:
- Mastic sealant application to loose boot connections and small gaps: $280-$420
- Flex duct repair or replacement of 1-2 damaged runs: $340-$580
- Full flex duct replacement for a single zone: $850-$1,400
- Whole-system flex duct replacement in large two-story homes (2,500-4,500 sq ft): $1,200-$2,400
- Duct insulation replacement for attic trunk lines: $450-$780
These are whole-system prices, not per-vent teaser rates. What drives cost: the number of zones, accessibility in the attic or crawl space, extent of construction debris requiring source removal before sealing, and whether we’re repairing or replacing flex runs. Every price is written and agreed before work starts. No exceptions. Haven Standard Clause 1. Call (678) 693-5322 for a free estimate at your Cumming home.
We Also Serve Cities Near Cumming
CleanRun crews work throughout north metro Atlanta, including Cumming and nearby Alpharetta, Canton, Duluth, and Suwanee. Scheduling is coordinated from our Atlanta office with local dispatch to all service areas.
Serving Cumming, GA - Our Local Coverage Area
We’re based in the Cumming 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 Cumming
Yes, and likely sooner than you expect. In Cumming’s 2000s-era subdivisions, the original construction debris - red Georgia clay dust and drywall particulate - is frequently still compacted in the plenum from simultaneous framing and HVAC rough-in. We’ve found this material untouched 15 years later, and it recirculates every time your blower cycles. A camera inspection will show you exactly what’s in there. Call (678) 693-5322 for a free estimate.
Lake Lanier’s evaporative effect creates localized higher humidity in lakeside subdivisions that inland Forsyth communities don’t experience. When your duct system has any air-sealing gaps - loose boot connections, failed mastic, or access panel leaks - that humid unconditioned air infiltrates and keeps duct lining damp long enough for mold to colonize. The same gap in a drier microclimate might never support growth. Proper mastic sealing closes these infiltration paths. Call (678) 693-5322 for an inspection.
Three things: install proper flex duct supports to prevent sagging and kinking; complete source removal of construction debris before final HVAC startup; and use mastic sealant on all boot connections instead of tape that dries and fails. None of this was standard practice during the rapid-build era along SR-400. We’re now correcting these omissions in homes throughout Windermere and similar subdivisions. Call (678) 693-5322 to schedule correction work at your home.
Signs of flex duct damage: weak airflow at second-floor registers, visible sagging or kinking if you can access the attic, and temperature differences of more than 3-4 degrees between rooms on the same zone. Our camera inspection shows the internal condition - collapsed liner, debris blockage, or structural damage. Cleaning removes debris; repair fixes the physical damage. We photograph both and explain what we’re seeing before recommending any work. Call (678) 693-5322 for a camera inspection.
Yes, measurably. Cumming’s HVAC systems run nearly continuously from April through October, and every cubic foot of conditioned air leaked into the attic is air you’re paying to create but not receiving. Sealed ducts deliver more of that air to your rooms, which means the system reaches setpoint faster and cycles less. In humid lakeside areas, sealing also prevents moisture infiltration that forces the system to work harder for the same comfort. Most Cumming homeowners notice the difference in both comfort and utility usage. Call (678) 693-5322 for a written estimate.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Cumming since 2013.