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 Norcross
Duct repair and sealing in Norcross typically runs $340-$890 for most residential jobs, with flex duct replacement and full-system mastic sealing at the higher end. Crews dispatched from our Atlanta office usually reach Norcross properties within 45 minutes to an hour, and we carry the common flex sizes and mastic supplies needed for the 1970s-1990s housing stock that dominates this market. If your registers blow weak, your upstairs rooms never reach temperature, or your energy bills have climbed without explanation, the problem is often in the ductwork itself - not the HVAC unit.
We’ve worked in Norcross since 2013, and the pattern is consistent. The garden apartments along Jimmy Carter Boulevard, the ranch homes near the historic district with crawlspace-retrofitted systems, and the split-levels off Peachtree Industrial Boulevard all share one thing: original duct materials that have exceeded their service life by a decade or more. Our Duct Repair & Sealing crews document every run with before-and-after photography, and every job starts with a written price delivered before any panel comes off. Call (678) 693-5322 for a free estimate.
Why CleanRun Air Duct Cleaning Cumming Is Norcross’s Preferred Duct Repair & Sealing Company
CleanRun is independently owned and operated under the Haven Standard, and we’ve served more than 52,000 homes across metro Atlanta since 2013. Norcross customers specifically mention the photo record in reviews - they can see the collapsed flex, the separated trunk connection, the red-clay grit coating the inside of their supply runs. That documentation is included on every visit, not offered as an upgrade.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. Scheduling and dispatch are coordinated from our Atlanta office, but the crews serving Norcross live in the corridor and know the difference between a 1980s garden apartment slab system and a historic-district ranch with crawlspace retrofit. No one drives from Marietta guessing at Gwinnett County construction methods.
The 365-Day Done Right Promise applies in Norcross exactly as it does everywhere we work: if the repair fails, we make it right, backed in writing on every job. We also offer a Free Second Opinion on any written estimate from a competitor - bring us the quote, and we’ll put our number next to it, line item by line item.
Our Duct Repair & Sealing Services in Norcross
Flex Duct Repair
Flex duct is the black corrugated tubing found in most Norcross homes built between 1975 and 1995. After 30-40 years, the inner liner tears, the wire helix rusts through, and sag points collapse - especially in the humid Piedmont climate where condensation accelerates deterioration. We replace collapsed sections with new insulated flex, support it properly to prevent future sag, and seal every connection with mastic and mesh tape. In Norcross’s 1980s garden apartments off Jimmy Carter Boulevard, we regularly find horizontal flex runs that have completely separated from the trunk line, blowing conditioned air into the slab cavity instead of the bedroom.
Mastic Sealant Application
Mastic is a thick, water-based sealant brushed or troweled onto duct joints - it remains flexible for decades and outperforms foil tape in crawlspaces and attics. For Norcross homes with HVAC retrofitted through unconditioned crawlspaces, particularly the older ranches near the historic district, mastic sealing is often the critical fix. The original installers used tape that has long since dried and peeled; Georgia red-clay dust and humidity have been infiltrating through those seams ever since. We apply mastic to every accessible joint, then photograph the sealed connections for the job record.
Air Leak Repair
Leakage in duct systems is measured as a percentage of total airflow - in many Norcross homes we test, 25-35% of conditioned air never reaches the registers. We pressurize the system, locate leaks with smoke and digital manometers, then repair with appropriate methods: mastic for small gaps, custom sheet-metal patches for larger holes in metal trunk lines, or flex replacement where the damage is extensive. The work is documented with pressure readings before and after, included in your photo record.
Metal Duct Repair
Older Norcross homes - including some in the historic district core with retrofitted forced-air systems - may have galvanized steel trunk lines that have rusted through at seams or been damaged by subsequent renovation work. We fabricate and install custom sheet-metal patches, seal with mastic, and insulate where the original wrapping has deteriorated. This is slower work than flex replacement, but it preserves systems that are otherwise sound.
Duct Insulation
Uninsulated or poorly insulated ductwork in Norcross crawlspaces and attics loses significant thermal energy. We install foil-faced fiberglass insulation or closed-cell foam wrapping, depending on access and configuration, to bring the system up to current practice. This is often combined with sealing work - insulation without sealing is like putting a jacket over a torn shirt.
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 Norcross
Our equipment roster includes Rotobrush agitation systems for duct interior cleaning, Nikro negative-air machines for source removal, and Abatement Technologies HEPA filtration for containment during repair work. We stock common flex duct diameters, mastic compounds, and mechanical fasteners specific to the sizes found in Norcross’s 1980s-1990s construction, which means most repairs are completed in a single visit without waiting on parts. For homes with integrated air-quality components, we also work with Honeywell and Aprilaire controls and media filters. Customers can verify every brand independently - we name them specifically because the equipment matters as much as the technician operating it.
Common Duct Repair & Sealing Problems We See in Norcross Homes
- Collapsed flex in garden apartment slab systems. The 1980s complexes along Jimmy Carter Boulevard and Peachtree Industrial Boulevard use horizontal flex duct embedded in or beneath the slab. Decades of tenant turnover with no professional maintenance means sag points have collapsed, trunk connections have separated, and supply air is dumping into the building envelope instead of the rooms.
- Unsealed crawlspace retrofit seams. Older ranch homes near the historic district frequently had HVAC added decades after construction, with duct runs routed through unconditioned crawlspaces. The original installers relied on tape that failed years ago; red-clay dust and Piedmont humidity have infiltrated continuously, coating supply runs in a gritty biofilm that standard cleaning cannot fully remove without source removal and resealing.
- Condensation-fed biofilm in flex duct. Norcross’s humid subtropical climate, combined with any return-air leakage, creates sustained moisture conditions inside flex duct. The result is visible mold or biofilm growth that recurs after surface cleaning unless the underlying leaks are sealed and the damaged flex is replaced.
- Deteriorated liner in 1990s tract homes. The Gwinnett County subdivisions built during the 1980s and 1990s - many between Singleton Road and Medlock Bridge Road - used flex duct with inner liners that become brittle and tear after 25-30 years. Airflow drops, rooms become unbalanced, and the system runs longer to compensate.
Pricing for Duct Repair & Sealing in Norcross, GA
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts. Here is what duct repair and sealing costs in the Norcross market:
| Service | Typical Range in Norcross |
|---|---|
| Single flex duct run replacement (standard residential) | $340-$520 |
| Multi-run flex repair with mastic sealing (partial system) | $580-$780 |
| Full-system mastic sealant application (accessible ductwork) | $720-$890 |
| Metal trunk line repair with custom patch | $420-$650 per location |
| Duct insulation wrap (per linear foot, materials and labor) | $8-$14 |
Factors that move a job toward the higher end: limited crawlspace access requiring additional labor, extensive biofilm requiring source removal before sealing, and multiple separated connections in slab-on-grade systems. Every estimate is free, delivered in writing, and valid for 30 days. We also provide a Free Second Opinion on any competitor’s written estimate - bring it to us, and we’ll put our line-item pricing next to it.
We Also Serve Cities Near Norcross
Our crews work throughout Gwinnett and northern Fulton counties, including Duct Repair & Sealing in Norcross and surrounding communities: Buford, Lawrenceville, Suwanee, and Duluth. Scheduling is coordinated from our Atlanta office, with local dispatch to each service area.
Serving Norcross, GA - Our Local Coverage Area
We’re based in the Norcross 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 Norcross
They need sealing more than cleaning because the ductwork has typically never been professionally serviced through 30-plus years of tenant turnover, so the flex has collapsed or separated at trunk connections - no amount of vacuuming restores airflow through a disconnected run. The real fix is reconnecting, supporting, and sealing the system, then documenting the repair with before-and-after photography. Call (678) 693-5322 for a free estimate - we’ll camera-inspect and show you exactly what we find.
Expect us to start with a camera inspection of every accessible run, because crawlspace-retrofitted systems in this area were rarely sealed properly at installation and have been infiltrating red-clay dust and humidity for decades. We photograph the interior condition, pressurize the system to quantify leakage, then present a written scope and price before any repair begins. Most of these homes need mastic sealing at minimum; many also require section replacement where the biofilm buildup is too thick for cleaning alone.
We know by combining airflow measurement at each register with camera inspection inside the duct - dirty duct still carries measurable airflow; collapsed or separated flex shows near-zero velocity and visible obstruction or disconnection on camera. In Norcross’s 1980s-1990s housing stock, we find collapsed flex in roughly one of every three inspections. The photo record shows you the exact condition, and the written estimate specifies whether cleaning, repair, or replacement is appropriate.
Yes - these homes typically have 25-40% duct leakage, which means a quarter to a third of your heating and cooling energy is wasted, and rooms at the end of long runs never reach set temperature. Sealing with mastic usually pays back in 2-4 years through reduced runtime, plus the comfort improvement is immediate and noticeable. We measure leakage before and after, so you have documented proof of the improvement. Call (678) 693-5322 for a free estimate with pressure-test numbers.
We use Rotobrush agitation tools and Nikro negative-air extraction for source removal where biofilm is present, plus Abatement Technologies HEPA containment when mold is suspected. For the physical repair work, we carry the flex diameters and mastic compounds matched to 1980s construction specs, so we don’t waste time ordering parts. All equipment is professional-grade and named specifically so customers can verify manufacturer specifications independently.
We were called to a 1984 garden-style unit off Jimmy Carter Boulevard where the tenant complained of a musty smell every time the system kicked on. Pulling the air handler closet open, we found the horizontal flex run to the front bedroom had collapsed at a sag point and separated from the trunk - supply and return ducts were cross-leaking into each other. After camera inspection and agitation tools cleared the run, we reconnected with new flex, sealed every joint with mastic and mesh tape, and the musty smell cleared on the first cycle.
Ready to see what’s actually inside your ductwork? Call CleanRun at (678) 693-5322 for a free estimate in Norcross. Every job starts with a written price, includes a Documented Photo Record of every duct run, and is backed by our 365-Day Done Right Promise. Haven Standard Clause 1: no work begins until you have the full scope and cost in writing.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Norcross and metro Atlanta since 2013.