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
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Before
AfterFast, Reliable Duct Repair & Sealing Across Kennesaw
Most Kennesaw homes built between 1985 and 2005 were fitted with flex duct routed through unconditioned attics, and after 25 to 40 years of Cobb County heat, that ductwork is failing in predictable ways. Duct repair and sealing in Kennesaw typically runs $280-$680 for most residential jobs, with flex duct replacement or extensive mastic sealing at the higher end. We dispatch from our Atlanta office and serve Kennesaw neighborhoods regularly - call (678) 679-7540 for a written estimate before any work begins.
Our crews know the subdivisions off Barrett Parkway, the Stilesboro Road corridor, and the Lost Mountain area because we’ve worked in them for years. The housing stock here is uniform enough that we can usually tell a homeowner what we’ll find before we pull the first register. That familiarity means faster diagnosis, accurate upfront pricing, and no surprises once the camera goes in.
Why CleanRun Air Duct Cleaning Alpharetta Is Kennesaw’s Preferred Duct Repair & Sealing Company
We’ve served Kennesaw homeowners since 2013, and our reputation here is built on one practice: we show you what we found. Every job concludes with a Documented Photo Record of every duct run, delivered as a standard deliverable - not an upsell, not a favor. Kennesaw customers in subdivisions near Town Center and Barrett Parkway have left us reviews citing specifically that they chose us because we photographed the damage and named the price before touching a tool.
Scheduling is coordinated from our Atlanta office, but the crews serving Kennesaw are the same technicians who work Cobb County regularly. They know the local building patterns: the two-story colonials with flex duct crammed over the master bedroom, the ranch homes with sagging return runs near the water heater. Response time to Kennesaw is typically next-day or within 48 hours for non-urgent work; we don’t promise same-day because duct repair is a scheduled job that requires proper setup, negative-pressure containment, and time to do it right.
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 page, not buried in a footer. And our 365-Day Done Right Promise applies in Kennesaw exactly as it does everywhere else: if the work is not right, we make it right, backed in writing on every job.
Our Duct Repair & Sealing Services in Kennesaw
Flex Duct Repair
This is the service we perform most often in Kennesaw. The flex duct installed during the 1985-2005 buildout has an inner liner that degrades after sustained exposure to attic temperatures above 130°F. We’ve found degraded liner shedding fibrous particles into the airstream in homes off Jiles Road, near Lost Mountain, and throughout the Barrett Parkway corridor. Our flex duct repair includes removing the damaged section, installing new insulated flex with proper supports, and securing joints with mechanical fasteners rather than the cheap clamps that failed originally. We use professional-grade equipment from Rotobrush and Nikro for source removal of accumulated debris before the new section goes in.
Duct Sealing
Leaky supply and return ducts in Kennesaw attics pull in fiberglass insulation, pollen, and humid outdoor air every time the system cycles. Our duct sealing service targets every collar, joint, and penetration with mastic sealant - a brush-applied compound that remains flexible and seals gaps that foil tape or duct tape cannot. We seal before we insulate, and we photograph every sealed joint for the job record. In Kennesaw’s older subdivisions, we’ve measured supply ducts leaking 20-30% of conditioned air into the attic before sealing; after proper mastic application, that drops to code-compliant levels.
Metal Duct Repair
Hard-pipe metal duct is less common in Kennesaw’s subdivision housing stock, but we encounter it in additions, basement conversions, and some custom builds near Kennesaw Mountain. Metal duct failures usually involve separated seams, rust at condensation points, or disconnected takeoffs. We repair with proper sheet-metal screws, seal with mastic, and replace rusted sections with galvanized hard pipe. When metal duct is involved, we also inspect for proper slope on condensate lines - a detail often missed in Cobb County’s humid climate.
Duct Insulation
Unconditioned Kennesaw attics destroy duct insulation. The original R-6 or R-8 wrap on flex duct compresses, tears, or simply falls away after decades of heat cycling. We replace damaged insulation with fresh wrap or, in some cases, recommend upgrading to encapsulated duct systems for long-term performance. Proper insulation matters in Kennesaw because the attic temperature differential between summer and winter exceeds 100°F; without intact insulation, your HVAC system is conditioning the attic instead of your living space.
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 Kennesaw
Our equipment roster includes Rotobrush and Nikro for mechanical agitation and source removal, plus Honeywell and Aprilaire components for air quality integration when duct repair reveals a need for filtration or humidity control upgrades. We stock common flex duct diameters, mastic compounds, and mechanical fasteners locally, so Kennesaw jobs aren’t delayed waiting for parts. If your system includes specialized components - zone dampers, ERV connections, or custom plenum configurations - we identify them during the camera inspection and source what we don’t carry. Every brand we name is one you can look up independently; we don’t hide behind proprietary tools or vague claims about “professional equipment.”
Common Duct Repair & Sealing Problems We See in Kennesaw Homes
- Flex duct inner liner degraded by attic heat. Kennesaw’s unconditioned attics routinely exceed 130°F in July and August. After 25-40 years, that heat breaks down the inner liner of original flex duct, causing it to shed particles into the airstream. The camera shows a fuzzy, degraded surface where there should be smooth polyethylene - a failure mode far more prevalent here than in older Atlanta neighborhoods with hard-pipe systems.
- Partially collapsed joints from cheap 1990s clamps. High-volume builders in the Barrett Parkway corridor used the lowest-cost clamp fittings available. We’ve found these clamps completely detached in homes off Stilesboro Road, turning duct runs into debris traps packed with pine pollen and lint. Standard brush cleaning cannot clear these sections until the sagging duct is re-secured or replaced.
- Mold colonization from Cobb County humidity. Kennesaw’s proximity to Kennesaw Mountain’s forested slopes drives high pollen loads, and the muggy summer climate keeps humidity cycling through return-air systems for months. Neglected ducts - especially upstairs bedroom returns - often show mold growth on the interior liner. We document this with the camera, remove it through HEPA-filtered negative pressure extraction, and repair the underlying moisture intrusion before sealing.
- Sagging, debris-laden runs in unconditioned attic space. The Georgia builder shortcut of pushing flex duct through hot attics rather than conditioned soffits or chases has left Kennesaw subdivisions with duct runs that sag between joists, collecting debris at low points. We see this pattern repeatedly in the Lost Mountain area and off Jiles Road - duct that should be straight and supported instead drapes like a hammock, restricting airflow and trapping contaminants.
Pricing for Duct Repair & Sealing in Kennesaw, GA
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts - no exceptions. A typical flex duct repair in Kennesaw runs $280-$450 per run, depending on length, accessibility, and whether the plenum connection also needs resealing. Full-system mastic sealing for a 2,000-square-foot home with 8-12 supply and return runs typically falls between $480-$680. Duct insulation replacement adds $180-$320 depending on the linear footage involved.
| Service | Typical Range in Kennesaw |
|---|---|
| Single flex duct repair/replacement | $280 - $450 |
| Whole-system mastic sealing | $480 - $680 |
| Duct insulation replacement | $180 - $320 |
| Metal duct seam repair or section replacement | $320 - $580 |
| Camera inspection with written report | $0 (included with repair estimate) |
What moves a job to the higher end: multiple collapsed runs, mold remediation requirements, or access limitations in tight Kennesaw attics with truss engineering that restricts crew movement. What we never do: quote a low per-vent teaser price, then inflate the invoice once the truck is on your driveway. Every Kennesaw customer receives one flat price per system, agreed in writing, before a panel comes off. Bring a competitor’s written estimate and we’ll provide a Free Second Opinion at no cost.
We Also Serve Cities Near Kennesaw
Our crews work throughout Cobb and Cherokee counties, including Kennesaw neighbors in Marietta, Woodstock, Holly Springs, and Smyrna. The same Duct Repair & Sealing standards - written price first, documented photo record on departure, 365-Day Done Right Promise - apply in every city we serve. Scheduling is coordinated from our Atlanta office, with local dispatch to each area.
Serving Kennesaw, GA - Our Local Coverage Area
We’re based in the Kennesaw 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 Kennesaw
Because cleaning cannot fix structural failures. In Kennesaw’s 1985-2005 housing stock, we regularly find flex duct with degraded inner liner, partially collapsed joints, or separated connections - damage that brush cleaning alone will not correct and can even worsen. Repair re-establishes the physical integrity of the duct run; cleaning removes debris from intact ductwork. We determine which you need through camera inspection, and we show you the footage before quoting either service. Call (678) 679-7540 to schedule.
It finds the specific failure modes this housing stock produces: degraded flex liner shedding fibers, collapsed joints from failed 1990s clamps, mold on return runs from humidity cycling, and debris accumulation at sag points. On a recent job off Stilesboro Road near Lost Mountain, our tech pulled a register and found flex duct partially collapsed at an interior joint - the cheap clamp had given way, turning the run into a debris trap packed with pine pollen and lint. After camera inspection and negative pressure setup, we re-secured the sagging section, applied mastic sealant at the collar, and source-removed the accumulated debris through HEPA filtration; airflow at the far bedroom register went from barely-there to balanced with the rest of the supply and return ducts. The customer received before-and-after photos of every run as part of the standard job record.
Not necessarily - it depends on what the camera shows. Isolated damage at joints or a single degraded section is usually repairable by replacing that run. Widespread liner degradation throughout the entire system, or multiple collapsed runs with evidence of rodent damage, may indicate that replacement is more cost-effective than piecemeal repair. We give you the camera footage and a written price for both options, then you decide. No pressure, no “today only” pricing. Call (678) 679-7540 for an exact assessment.
Kennesaw sits at the southern edge of the Blue Ridge foothills, and Kennesaw Mountain’s heavily forested oak and pine canopy produces pollen loads far higher than more urbanized parts of metro Atlanta. That pollen infiltrates through return-air grilles, gaps in duct seams, and every time doors open during spring peak. Once inside, it packs into flex duct bends - especially at collapsed or sagging sections - where standard household filters cannot reach it. Proper duct sealing with mastic closes the infiltration paths, and repair of damaged runs eliminates the traps where pollen accumulates.
It reduces the load your system fights against. In Kennesaw’s climate, an unsealed duct system in a 130°F attic can pull that superheated air into supply lines or lose 20-30% of conditioned air before it reaches the register. After proper mastic sealing, the system delivers designed airflow to each room, cycles less frequently, and maintains humidity control more effectively during Cobb County’s muggy summers. We measure airflow at key registers before and after sealing, and we include those readings in your written job record. Call (678) 679-7540 for a free estimate - we’ll show you exactly what we find.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Kennesaw since 2013.