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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Before
AfterFast, Reliable Duct Repair & Sealing Across Norcross
Duct repair and sealing in Norcross typically costs $280-$750 for most residential jobs, with flex duct replacement running higher in aging multi-family complexes where multiple runs have failed. Our crews serve Norcross from our Atlanta office, carrying mastic sealant, mesh tape, and replacement flex duct sized for the 1970s-1990s construction that dominates this market. Call (678) 679-7540 for a written estimate before any work starts.
We’ve been working in Norcross since 2013, and the housing stock here doesn’t behave like Alpharetta or Duluth. The split between Historic District retrofits and decades-old rental complexes means we assess your duct era before we quote a single seal. That’s Haven Standard Clause 1: written price before any work starts, every time.
Why CleanRun Air Duct Cleaning Alpharetta Is Norcross’s Preferred Duct Repair & Sealing Company
Our reputation in Norcross was built on documented evidence, not coupons. We’ve served over 52,000 homes since 2013, every one with a written price agreed before the first panel came off and a photo record delivered after the crew left. In Norcross specifically, property managers at complexes near the intersection of Jimmy Carter Boulevard and Buford Highway now call us directly when tenant complaints stack up - they know our camera inspections show exactly what’s failing and where.
Response time to Norcross is same-day or next-day for standard calls, coordinated from our Atlanta dispatch office. We don’t promise emergency speed we can’t deliver; we promise a crew that knows what 30-year-old flex duct looks like when the liner starts shedding, because they’ve replaced it in Norcross dozens of times.
Haven Standard Clause 3: Verified Crews means every technician is background-checked, uniformed, and identified by name before arrival. Our license number is published on every estimate, not buried in a footer. And our Duct Repair & Sealing team carries the equipment to handle both Historic District metal retrofits and rental-complex flex duct failures without running back to the warehouse.
Our Duct Repair & Sealing Services in Norcross
Duct Sealing with Mastic Sealant
Mastic sealant is a thick, fiber-reinforced compound brushed onto duct joints and seams, then mesh-taped for structural reinforcement - it outlasts foil tape by decades in Norcross’s humidity. We use it on every metal joint we touch, and on flex-to-metal transitions where the original installer relied on zip ties or inadequate tape. In Norcross’s Historic District, where ductwork was retrofit into wall cavities never designed for HVAC, mastic alone often won’t bridge irregular gaps; we fabricate custom sheet metal collars first, then seal. A typical mastic sealing job in Norcross runs $280-$450 for a standard residential system.
Flex Duct Repair
Flex duct - the ribbed, insulated tubing common in 1980s-1990s construction - has a 25-year service life in ideal conditions. In Norcross’s rental complexes off Jimmy Carter Boulevard and Buford Highway, we’re regularly finding flex duct that’s 35-45 years old, with deteriorated liners shedding fiberglass into the airstream and joints fully separated inside wall cavities. Our crew carries replacement flex duct, connectors, and insulation wrap sized for these older systems. Partial repair of 1-2 failed runs typically runs $340-$520; full replacement of a compromised trunkline in a townhome can reach $680-$950. We photograph every run before and after, delivered as part of your standard job record.
Metal Duct Repair
Sheet metal ductwork, found in newer Norcross construction and Historic District retrofits, fails at seams and support hangers rather than liner deterioration. We repair separated seams with S-lock drives and mastic, replace rusted sections with galvanized stock, and reinforce sagging trunklines with proper strap supports. Metal repair in Norcross typically runs $320-$580 depending on accessibility and the extent of corrosion from years of condensation in unconditioned attics or crawlspaces.
Duct Insulation Replacement
Insulation wrapped around flex duct or applied to metal trunklines degrades from roof leaks, pest intrusion, and simple age. In Norcross’s humid climate, compressed or water-damaged insulation loses its R-value and becomes a mold substrate. We remove compromised insulation, treat the underlying duct for microbial growth if needed, and reinstall with fresh wrap or rigid board insulation. Insulation replacement typically adds $180-$340 to a sealing job, depending on linear footage and attic accessibility.
Air Leak Repair
Air leak repair targets the pressure-tested failures that cost you money every month. We pressurize the system, locate leaks with smoke pencils or theatrical fog, then repair each point with the appropriate method - mastic for metal seams, new flex for torn duct, custom collars for irregular transitions. In Norcross, we frequently find that “poor airflow” complaints trace to a single massive leak: a disconnected trunkline, a missing end cap, or a return duct pulling attic air through a failed filter slot. Finding and fixing that one leak often changes system performance more than any other single repair. Air leak diagnosis and repair in Norcross runs $260-$480 for most residential systems.
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.
Before
AfterTrusted Brands We Service in Norcross
Our trucks stock parts and sealants from Honeywell, Aprilaire, and Abatement Technologies - brands we name so you can verify specifications independently. For Norcross customers, this means faster turnaround without waiting on warehouse orders: Honeywell zone dampers for retrofit systems, Aprilaire media cabinets for upgraded filtration, Abatement Technologies HEPA equipment for source removal before sealing. We don’t claim these brands make our work better; we claim that using traceable, professional-grade equipment lets you hold us accountable for the result. Every part installed is noted on your written scope, with manufacturer documentation available on request.
Common Duct Repair & Sealing Problems We See in Norcross Homes
- Flex duct collapse in aging rental complexes. The 1980s-1990s apartment and townhome stock along Buford Highway and Jimmy Carter Boulevard was built with fiberglass flex duct now 30-45 years old. Liner deterioration, joint separation, and partial collapses are routine. Our camera inspections regularly find conditioned air venting into crawlspaces for years before any tenant complaint reached a landlord.
- Historic District retrofit failures. Norcross’s pre-central-air homes, some dating to the early 1900s, had ductwork forced into wall cavities never designed for it. Sealing failures occur at irregular transitions where round duct meets square framing voids, and mastic alone can’t bridge the geometry. These need custom fabrication, not standard repair kits.
- Mold-compromised liner from humid summers. Metro Atlanta’s subtropical humidity keeps duct interiors damp June through September. In Norcross’s heavily wooded lots, shade extends that damp window. Mold growth on exposed fiberglass liner weakens the material and contaminates supply air; sealing over it traps the problem. We remove compromised liner before sealing, documented in your photo record.
- Pollen loading accelerated by oak and pine canopy. Norcross sits under some of Georgia’s densest urban tree cover. Spring pollen loads coat return duct walls, restricting airflow and providing organic material for microbial growth. Homes without regular cleaning develop a compound problem: restricted airflow plus biological contamination, both requiring attention before effective sealing.
Pricing for Duct Repair & Sealing in Norcross, GA
Honest pricing means naming numbers. Here’s what duct repair and sealing costs in the Norcross market:
| Service | Typical Range in Norcross |
|---|---|
| Mastic sealing (standard residential system) | $280-$450 |
| Flex duct repair (1-2 runs) | $340-$520 |
| Flex trunkline replacement (townhome/complex unit) | $680-$950 |
| Metal duct repair (seams, supports, section replacement) | $320-$580 |
| Air leak diagnosis and repair | $260-$480 |
| Duct insulation replacement (per system) | $180-$340 |
What moves a job toward the higher end: multiple failed runs, attic or crawlspace access requiring protective setup, mold remediation before sealing, or custom sheet metal fabrication for Historic District retrofits. What keeps it lower: single-point failures, good access, and systems that have been maintained within the last decade. Every estimate is free, written, and delivered before work starts - no exceptions. Call (678) 679-7540 to schedule.
Our 365-Day Done Right Promise applies to every repair: if the seal fails, the leak returns, or the repair doesn’t perform as scoped, we make it right. In writing, not as a favor.
We Also Serve Cities Near Norcross
Our crews work throughout Gwinnett and north Fulton counties. If you’re in Buford, Lawrenceville, Suwanee, or Duluth, the same Duct Repair & Sealing in Norcross crew that handles Jimmy Carter Boulevard rentals also serves your market - with the same written pricing, photo documentation, and Haven Standard accountability. Dispatch is coordinated from our Atlanta office; travel time to these neighboring cities is built into your estimate, never added as a surprise charge.
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
Every 3-5 years for cleaning, with sealing inspected at each cycle. The 1980s-1990s flex duct in complexes off Jimmy Carter Boulevard and Buford Highway degrades faster than owner-occupied single-family stock because turnover means no tenant has long-term incentive to report gradual airflow loss. We recommend landlords schedule camera inspections every three years; tenants should request one if any room consistently runs 5+ degrees off the thermostat setpoint. Call (678) 679-7540 for a free inspection quote.
Historic District ductwork was retrofit into wall cavities built for plaster and lath, not HVAC. The irregular geometry means standard round-to-round connectors don’t fit, and mastic can’t bridge gaps between round duct and square framing voids. We fabricate custom sheet metal collars or flex-to-metal adapters for each transition, then seal with reinforced mastic. Tract homes from the 1970s-1990s use standardized flex duct that connects with off-the-shelf parts. The repair approach is fundamentally different, and we assess which era we’re working with before quoting. Call (678) 679-7540 - we’ll ask the right questions before we dispatch.
Partial or full disconnection of the main trunkline, often venting conditioned air into crawlspaces or wall cavities for years. We were called to an early-1990s rental townhome off Jimmy Carter Boulevard where the tenant kept complaining of weak airflow and high summer humidity even with the air handler running constantly. Our camera inspection revealed the main trunkline flex duct had fully disconnected at a joint in the wall cavity, venting conditioned air into the crawlspace for what looked like years. We reconnected the run, sealed every joint with mastic and mesh tape, and pressure-tested before the tenant noticed any difference in the registers - two days later they called back saying the second floor finally cooled like the first. Every repair includes before-and-after photos of your specific ductwork, not stock images.
Yes. Norcross’s heavy oak and pine canopy produces pollen counts among the highest in the country each March through May. That pollen pulls through return-air grilles and adheres to damp duct walls, building a layer of organic debris that restricts airflow and feeds mold growth. Homes without regular cleaning - especially rentals with deferred maintenance - develop compound problems that sealing alone won’t fix. We remove source contamination before sealing, documented in your photo record. Call (678) 679-7540 to assess whether your ducts need cleaning before sealing.
We won’t, and any contractor who offers to is trapping problems behind the sealant. Georgia’s humid subtropical climate keeps duct interiors damp enough for mold growth; sealing over contaminated liner just locks moisture and organic debris in place. Haven Standard Clause 2 requires source removal before sealing if our camera inspection shows debris buildup or microbial growth. The photo record from your inspection shows exactly what we found and why we recommend the sequence we do. Call (678) 679-7540 for an inspection - estimates are free, and we’ll show you what the camera sees before quoting any work.
Ready for a written estimate? Call CleanRun at (678) 679-7540. We’ll answer with a live person, schedule a technician who knows Norcross’s housing stock, and deliver a written price before any work starts. Every job includes a Documented Photo Record of every duct run and is backed by our 365-Day Done Right Promise.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Norcross and metro Atlanta since 2013.