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 Kennesaw
Duct repair and sealing in Kennesaw typically runs $340-$890 for most residential jobs, with flex duct repairs at the lower end and full-system mastic sealing with insulation replacement at the upper end. We dispatch crews to Kennesaw from our Atlanta coordination office, and most appointments are scheduled within 2-4 business days. Call (470) 516-9337 for a written estimate before any work begins.
We’ve been working in Kennesaw since 2013, and the pattern is unmistakable. Drive through the subdivisions off Barrett Parkway or Wade Green Road and you’re looking at thousands of homes built from identical blueprints during Cobb County’s 1990s and early-2000s buildout. Those houses are hitting 20-30 years old now. The flex duct in their attics was builder-grade to begin with, and it’s been cooking in 130-140°F summer temperatures ever since. Our Duct Repair & Sealing team knows these systems. We know where they sag, where the joints separate, and where drywall dust from construction is still pooling in low spots.
Why CleanRun Air Duct Cleaning Marietta Is Kennesaw’s Preferred Duct Repair & Sealing Company
Kennesaw homeowners aren’t looking for a sales pitch. They’re looking for someone who can show them what’s actually wrong, put a price in writing, and fix it. That’s what we do. Our 365-Day Done Right Promise is backed in writing on every job, not mentioned in passing and forgotten. If the work isn’t right, we make it right.
Our technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. Tomas Reyes, who leads CleanRun, established this practice in 2013 and has maintained it across 52,000+ homes served. Every customer receives a Documented Photo Record of every duct run, before and after, as a standard deliverable. You don’t have to take our word for what was done. The photos show it.
We coordinate scheduling from our Atlanta office, but our crews serve Kennesaw locally and understand its housing stock. They know the difference between a 1998 colonial off Bells Ferry Road and a 2005 craftsman near Town Center, and they know which duct layouts each builder favored. That local pattern recognition saves time and prevents unnecessary exploratory work.
Our Free Second Opinion policy means you can bring us any competitor’s written estimate and we’ll put our number next to it, no charge. Haven Standard Clause 1 requires a written price before any work starts, every time. No exceptions.
Our Duct Repair & Sealing Services in Kennesaw
Flex Duct Repair
Kennesaw’s housing stock is dominated by flex duct runs through unconditioned attics, and after 20-30 years of heat cycling, the failures are predictable. The inner plastic liner cracks. The insulation compresses. Hanger points sag, creating low spots where debris pools and airflow drops. We replace damaged flex sections with new, properly supported runs, using professional-grade materials from Nikro and Abatement Technologies. In the large planned subdivisions off Barrett Parkway, our technicians can often predict the exact register locations where sag-related disconnections will be found before opening a single grille, because the failure pattern is identical house to house across the neighborhood.
Duct Sealing with Mastic Sealant
Partially separated collars and leaky connections are the norm in Kennesaw’s aging flex duct systems, not the exception. We seal these joints with mastic sealant, a brush-applied compound that remains flexible after curing and creates a permanent airtight bond at temperatures well above attic summer peaks. Unlike foil tape, which degrades and peels, mastic is the standard specified by ACCA Manual D and ASHRAE guidelines. We apply it to every accessible joint, boot, and plenum connection, then pressure-test to verify results. A typical mastic sealing job in Kennesaw runs $420-$680 for a single-system home.
Metal Duct Repair
While Kennesaw’s 1990s-2000s buildout favored flex duct, some homes - particularly custom builds and earlier construction near Kennesaw Mountain - use galvanized steel trunk lines with flex branches. We repair separated seams, replace rusted sections, and seal metal-to-metal connections with mastic and fiberglass mesh reinforcement. Metal ductwork failures in Kennesaw are less common but tend to be more severe when they occur, often involving rust from condensation in poorly insulated sections.
Duct Insulation Replacement
Flex duct insulation in Kennesaw attics deteriorates faster than manufacturer specifications suggest, because summer attic temperatures here routinely exceed the 120°F design threshold. Compressed, moisture-damaged, or delaminated insulation is removed and replaced with new R-6 or R-8 flex duct with vapor-barrier outer wrap. We photograph the before condition and the installed replacement, included in your standard job record. Proper insulation prevents the condensation that leads to mold growth in liner folds, a problem we see regularly in Kennesaw’s humid summers.
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 Kennesaw
CleanRun technicians carry professional-grade equipment from trade-recognized brands: Rotobrush agitation systems, Nikro HEPA-filtered negative-air machines, Abatement Technologies containment and filtration, Honeywell and Aprilaire air quality components, and Guardsman protective materials. We stock common flex duct diameters, mastic sealant, and insulation wraps for Kennesaw’s predominant system configurations, which means most repairs don’t require a return visit for parts. You can verify every piece of equipment we name. These aren’t proprietary labels. They’re catalog items from established manufacturers, and we use them because they produce documented results we can photograph and show you.
Common Duct Repair & Sealing Problems We See in Kennesaw Homes
- Builder-grade flex sagging at hanger points. In Kennesaw’s 130-140°F attics, the wire helix in flex duct softens and the run droops between supports. Low spots collect drywall dust, pollen, and debris. Airflow drops. Eventually the joint at the register boot separates partially. We see this exact pattern in colonial-style homes off Wade Green Road and Barrett Parkway.
- Construction debris left from original buildout. Drywall dust, wood scraps, and insulation fragments from the 1990s and 2000s construction boom remain in supply and return ducts, clogging registers and reducing system efficiency. Homeowners who bought new often assume the builder cleaned the ducts. They rarely did.
- Condensation and mold in poorly insulated flex runs. Kennesaw’s summer humidity creates moisture inside duct runs where insulation has compressed or torn. The dark, damp interior of flex liner folds becomes a growth medium. We find this most often in homes where the attic air handler sits directly above a second-floor hallway, with long horizontal flex runs that never fully dry.
- Pollen infiltration through leaky return-air gaps. Kennesaw sits in Georgia’s Piedmont pine and hardwood belt, with some of the heaviest seasonal pollen loads in the southeastern U.S. That pollen enters duct systems through gaps in return plenums and poorly sealed filter racks, accumulating far faster than in drier climates and accelerating filter loading and coil fouling.
Pricing for Duct Repair & Sealing in Kennesaw, GA
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts, and we don’t use teaser figures that change once we’re on site.
| Service | Typical Range in Kennesaw |
|---|---|
| Single flex duct run repair/replacement | $340-$520 |
| Mastic sealing of accessible joints (single system) | $420-$680 |
| Full-system flex duct inspection with spot repairs | $580-$890 |
| Duct insulation replacement (per run, materials included) | $180-$340 |
| Return plenum sealing and filter rack repair | $260-$440 |
What moves a job toward the higher end: multiple damaged runs, difficult attic access, asbestos-containing duct wrap requiring abatement protocol, or mold remediation before sealing can begin. What keeps it lower: localized damage we can access and repair without extensive material replacement. Every estimate is free, written, and delivered before any work starts. Bring a competitor’s quote and we’ll provide a Free Second Opinion in writing.
In a 1999 two-story colonial off Wade Green Road, our tech found the builder-grade flex supply run to the master bath register sagging at a hanger point, pooling drywall dust and pine pollen. Using a camera inspection and agitation tools under negative pressure, we performed source removal and sealed the separated collar with mastic sealant, restoring proper airflow and stopping dust from re-entering the supply and return ducts. The customer received before-and-after photos of every run, plus the written scope and warranty, as standard.
We Also Serve Cities Near Kennesaw
Our crews work throughout Cobb and north Fulton counties, including Kennesaw, Marietta, Woodstock, Holly Springs, and Smyrna. Scheduling is coordinated from our Atlanta office, with local technicians dispatched to each area. The same written-price guarantee, documented photo record, and 365-Day Done Right Promise apply in every city we serve.
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
Your 2002 home is 23 years old, and the builder-grade flex duct installed during Kennesaw’s rapid buildout was never designed for 130-140°F attic temperatures over two decades. The plastic inner liner becomes brittle. Hanger points sag. Joints separate. We regularly find homes from this exact era with 30-40% airflow loss from duct leakage alone. Call (470) 516-9337 for a free inspection and written estimate.
We use a combination of pressure pan testing, blower door integration, and camera inspection of accessible duct runs. In Barrett Parkway-area subdivisions, the duct layouts are so uniform that our technicians often know where to check first based on the builder and year. No walls need to come down. The testing is non-destructive and takes about 45 minutes. Call (470) 516-9337 to schedule.
The builder should have protected registers during construction, vacuumed debris from supply and return runs before ceiling drywall went up, and performed a post-construction duct cleaning with documented results. Most didn’t. Drywall dust, wood scraps, and insulation fragments from your 1990s or 2000s buildout are likely still in your system, compounding the normal aging failures of the flex duct itself. We remove this debris as part of our repair and sealing process, with photographic documentation.
Yes, significantly. Kennesaw’s location in the Piedmont pine and hardwood belt means exceptionally high spring and fall pollen loads. Much of what homeowners blame on “bad allergies” is actually pollen being drawn into leaky return plenums and distributed throughout the house. Sealing these gaps with mastic, combined with proper filter rack sealing, reduces infiltration by 60-80% in typical Kennesaw homes we’ve tested. The pollen that remains is captured by the HVAC filter instead of bypassing it through leaks.
We can repair a single joint, and we’ll tell you honestly whether that’s sufficient. In Kennesaw’s 20-30-year-old flex duct systems, however, a single visible failure usually indicates systemic degradation. The same heat cycling and sagging that separated one joint has stressed the entire run. We photograph everything we can access and give you a written scope that prioritizes repairs by severity. You’re free to proceed with any portion. The price for each item is listed separately before work starts.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Marietta, serving Kennesaw since 2013.