Fast, Reliable Duct Repair & Sealing Across Kennesaw
Duct repair and sealing in Kennesaw typically costs $280–$650 for most residential jobs, and we can usually inspect and quote same-day. If your upstairs rooms stay dusty no matter how often you clean, or your summer electric bills keep climbing, the culprit is likely in your attic — not your HVAC unit.
We’re familiar with every major Kennesaw corridor, from Barrett Parkway down to Bells Ferry Road and the Legacy Park subdivisions. Scott Gray, our owner and lead technician, has spent two decades working in the exact attics your home probably has — the unconditioned, 140°F spaces above 1990s two-story subdivisions where builder-grade flex duct was stapled in place and forgotten. When you call (877) 565-7296, you’re talking to the person who’ll actually show up with the tools, not a dispatcher sending a subcontractor you’ve never met.
Our Duct Repair & Sealing team handles everything from resealing separated boot connections to full flex duct replacement and metal duct restoration. We don’t outsource. We don’t franchise. And we don’t treat your ductwork as an afterthought to a bigger HVAC sale.
Why Everest Air Duct Cleaning Service Georgia Is Kennesaw’s Preferred Duct Repair & Sealing Company
Kennesaw homeowners know the difference between a generalist who glances at ducts and a specialist who crawls the full attic run. Scott Gray has worked every job for 20 years — your home gets the owner, not a substitute. That matters in 30144 and 30152, where the housing stock demands someone who’s seen the same failure patterns dozens of times.
433 neighbors have rated us 4.9 stars — the numbers speak for themselves. Many of those reviews come from repeat customers across Kennesaw’s West Cobb communities who started with a cleaning and came back when they realized their original duct seals had failed.
We typically respond to Kennesaw calls within the same day, and we carry the equipment to complete most repairs in a single visit: Rotobrush contact-cleaning systems, Nikro HEPA vacuums, and Abatement Technologies air scrubbers. From dirty ducts to repaired, sealed, and sanitized — we handle the full scope.
Our Duct Repair & Sealing Services in Kennesaw
Duct Sealing with Mastic Sealant
The original mastic applied in Kennesaw’s 1990s subdivisions has had thirty years to harden and crack. We remove the brittle residue and apply fresh, fiber-reinforced mastic sealant at every joint, boot, and plenum connection. In homes near Town Center at Cobb, this alone often restores 15–25% of lost system efficiency. A typical mastic resealing job in Kennesaw runs $280–$450 for a single-system home.
Flex Duct Repair
This is where Kennesaw’s housing stock shows its age. The flex duct stapled through your attic in 1995 wasn’t built for three decades of 140°F summer cycles. Inner liners tear. Insulation compresses. Sagging bends trap pollen and restrict airflow. We replace damaged sections with properly supported new flex, re-route runs to eliminate pinch points, and secure every connection with mechanical fasteners — not just tape that’ll fail again. Flex duct repair in Kennesaw typically ranges from $180 per section to $580 for multiple runs.
Metal Duct Repair
Some Kennesaw homes — particularly earlier construction near the 30160 ZIP and certain custom builds — have galvanized metal trunk lines. These can corrode at seams, separate at slip joints, or rattle loose from hangers. We spot-weld, re-seam, and re-hang metal ductwork, then seal with mastic for airtight performance. Metal repairs in Kennesaw generally fall between $320 and $720 depending on accessibility and extent.
Duct Insulation & Air Leak Repair
When original flex duct insulation has compressed to half its R-value — common in Kennesaw attics where summer heat literally bakes the material — we replace or supplement with new foil-faced insulation. Combined with air leak repair at boot-to-collar connections, this stops the 140°F attic air from being drawn directly into your living space. Full insulation and leak repair packages in Kennesaw typically run $450–$650.
What happens when you call
- 1
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.
Trusted Brands We Service in Kennesaw
We install Honeywell and Aprilaire air quality products in-house — electronic air cleaners, media filters, and whole-home purifiers that close the loop after we’ve sealed your ducts. On that Bells Ferry Road home, we found the original Aprilaire filter grille’s duct boot had pulled away from the drywall collar on the second floor. The owner had been complaining of dusty rooms and high summer cooling bills for years. We re-attached the boot with new mastic and foil tape, installed a fresh Honeywell electronic air cleaner in the return, and repaired a torn flex duct joint in the attic. The result was immediate: the air felt cleaner, and the HVAC system cycled less frequently. We stock parts for these brands and can typically complete both duct repair and air quality upgrades in one appointment — no waiting on a second contractor.
Common Duct Repair & Sealing Problems We See in Kennesaw Homes
- Flex duct boots separated from drywall collars. In Kennesaw’s 1990s subdivisions, the original foil tape and mastic seals at boot-to-drywall connections have dried out and failed from repeated 100°F+ attic heat cycles. Unconditioned attic air — and fiberglass insulation fibers — pull directly into bedrooms and living spaces. Homeowners notice dust that returns within hours of cleaning.
- Sagging flex duct bends trapping debris. Builder-grade flex in unconditioned Kennesaw attics was often installed with minimal support straps. Over decades, gravity and thermal cycling create low spots where Georgia’s heavy pollen load, combined with humidity, packs into the liner. This restricts airflow and accelerates inner liner degradation.
- Hardened mastic creating multiple small leaks. The original builder-grade mastic applied in 1985–2005 Kennesaw construction has become brittle and cracked. What was once a continuous seal is now a network of micro-leaks, each pulling conditioned air into the attic and driving up summer cooling costs.
- Inner liner tears releasing insulation fibers. When flex duct inner liners tear — common after 25+ years in Kennesaw’s heat — the fiberglass insulation layer behind them sheds particles into the airstream. This shows up as fine, itchy dust that doesn’t match your home’s normal dirt profile.
Pricing for Duct Repair & Sealing in Kennesaw, GA
We’re straightforward about numbers because Kennesaw homeowners research before they call. Here’s what duct repair and sealing typically costs in this market:
| Service | Typical Range in Kennesaw |
|---|---|
| Mastic sealant reapplication (single system) | $280–$450 |
| Flex duct repair (per section) | $180–$320 |
| Multiple flex duct section replacement | $380–$580 |
| Metal duct repair (seams, hangers, joints) | $320–$720 |
| Duct insulation replacement + air leak repair | $450–$650 |
| Full system assessment with written report | $0 (free with repair) |
What moves you within these ranges? Attic accessibility, extent of original damage, and whether we can complete the work from existing access points or need to create new ones. Homes in Kennesaw’s 30144 and 30152 ZIP codes with original 1990s flex duct often need more extensive boot re-attachment work than newer construction. We inspect first, quote in writing, and only proceed with your approval. Call (877) 565-7296 for a free estimate — we can usually inspect same-day.
We Also Serve Cities Near Kennesaw
Our service radius covers the full I-75 northwest corridor. We regularly repair and seal ducts in Acworth (including Brookstone and Lakeshore communities), Marietta (east toward Canton Road and the 30066 corridor), Powder Springs (south along Macland Road), and Fair Oaks (southeast near the Dobbins ARB area). If you’re unsure whether your home falls within our same-day service area, call and we’ll confirm — we don’t charge trip fees for Kennesaw-area estimates.
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
Yes — this is the most common failure pattern we find in Kennesaw’s 1990s subdivisions. The original mastic and foil tape seals at boot-to-drywall collar connections have hardened and cracked from three decades of attic heat cycling, creating direct leaks that pull 140°F attic air and fiberglass insulation into your living space. We re-attach boots with fresh mastic and mechanical fasteners, then verify airflow balance at each register. Call (877) 565-7296 for a free inspection — estimates are free.
Kennesaw sits in the Georgia Piedmont, where tree, grass, and ragweed pollen seasons stack across eight months of the year. That pollen packs into damaged duct liners and sagging flex bends, accelerating degradation and restricting airflow. Sealed, properly supported ductwork prevents this accumulation and protects your HVAC system from the added load. We see the worst buildup in homes with separated boot connections — the pollen enters through attic leaks, not outdoor intakes. Call (877) 565-7296 for a free inspection — estimates are free.
Yes — we repair flex duct, metal duct, and hybrid systems. Kennesaw’s dominant 1985–2005 housing stock uses flex duct, but we also service metal trunk lines in earlier construction and custom builds. Scott Gray evaluates each system in person and recommends repair versus replacement based on condition, not a one-size-fits-all script. Call (877) 565-7296 for a free inspection — estimates are free.
Yes — we work in Kennesaw’s unconditioned attics year-round, scheduling extensive repairs during milder morning hours when possible. Our mastic sealants are rated for application temperatures well above typical attic peaks, and we verify cure conditions before closing access. For emergency leaks during peak summer, we can apply temporary mechanical seals and return for permanent mastic work when temperatures allow. Call (877) 565-7296 for a free inspection — estimates are free.
We install Honeywell and Aprilaire air quality products — electronic air cleaners, high-efficiency media filters, and whole-home purifiers. These integrate directly with your sealed duct system to maintain the air quality gains after we’ve stopped the leaks. We stock these units locally and can typically install same-day as your duct repair. Call (877) 565-7296 for a free inspection — estimates are free.
Ready to Stop Losing Conditioned Air to Your Kennesaw Attic?
Twenty years of crawlspace-level experience goes into every inspection we perform. If your Kennesaw home was built between 1985 and 2005 and you’ve noticed dusty rooms, uneven temperatures between floors, or cooling bills that climb every summer, the problem is likely in your attic ductwork — not your HVAC unit itself. Scott Gray will inspect your system personally, show you exactly what’s failed, and quote the repair in writing before any work begins. No subcontractors. No upsells for services you don’t need. Just sealed, supported ductwork that moves air where it’s supposed to go.
Call (877) 565-7296 today for your free estimate. We serve all Kennesaw ZIP codes — 30144, 30152, 30156, and 30160 — with same-day response throughout the Barrett Parkway, Bells Ferry, and Legacy Park areas.
Written by Scott Gray, Owner at Everest Air Duct Cleaning Service Georgia, serving Kennesaw and the Atlanta metro since 2004.