Fast, Reliable Duct Repair & Sealing Across Dunwoody
Duct repair and sealing in Dunwoody typically costs $280-$650 for most residential jobs, with flex-duct replacement running higher if multiple runs have collapsed. Our Duct Repair & Sealing team can usually reach homes in Dunwoody within 45 minutes to an hour, and most repairs are finished in a single visit. Call (844) 685-6342 for a free estimate with upfront pricing before any work begins.
We’ve been driving out to Dunwoody since 1984, back when Georgetown and Dunwoody Club Forest were still new subdivisions and the Perimeter Center towers were going up. After four decades, we know the ductwork in these homes inside and out. The original fiberglass flex-duct systems installed during the 1970s and 1980s suburban boom are now well past their intended service life, and the protected tree canopy that makes Dunwoody distinctive loads HVAC systems with pollen and organic debris at levels we simply don’t see in neighboring cities. That’s not a guess. We pull return-air grilles in the Branches, Vermack, and neighborhoods near the Dunwoody Nature Center and measure the difference.
When your ducts are leaking, kinked, or pulling in attic air, you’re paying to heat and cool space you don’t live in. In Dunwoody’s climate, that inefficiency gets expensive fast.
Why Bellows Air Duct & Vent Co. Is Dunwoody’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in Dunwoody on showing up when we say and standing behind the work. Our 90-Day Done Right Promise means if something isn’t right, we return at no charge with no paperwork required. That’s been our policy since 1984, and Ray Castillo enforces it personally.
Our technicians are background-checked and uniformed, and they arrive with professional-grade equipment from Nikro, Honeywell, and Aprilaire. Every duct repair job gets a camera inspection before and after, so you see the condition of your system with your own eyes, not just take our word for it. We don’t use bait coupons or surprise pricing. The number we quote on the phone is the number on the invoice.
Calls are answered by a live person 24 hours a day, not a voicemail tree. If you’ve got a collapsed duct run on a Saturday evening in July, someone picks up. Most Dunwoody repairs are completed in a single visit, and we carry the parts and materials to handle original flex-duct systems that many newer companies haven’t even encountered.
Our Duct Repair & Sealing Services in Dunwoody
Flex Duct Repair
Dunwoody’s 1970s-1980s homes, especially in Georgetown, Dunwoody Club Forest, and the Branches, were built with fiberglass flex-duct routed through unconditioned attics. After 40 to 50 years of Georgia heat and gravity, that flex has sagged, kinked, and in many cases collapsed entirely. We remove damaged sections and replace them with properly supported rigid metal duct or new flex with adequate slope and strapping. At a ranch home in the Branches subdivision, we found original fiberglass flex-ducts in the attic with a sagged run near the air handler that had kinked and completely collapsed, choking airflow to the master bedroom. We removed the damaged section, re-routed rigid metal duct with mastic-sealed joints, and installed a new Aprilaire filter cabinet to handle the heavy oak pollen load, restoring balanced airflow and eliminating the whistling noise from the kinked line.
Duct Sealing
Leaking duct joints at the air handler, plenum connections, or register boots waste 20 to 30 percent of conditioned air in a typical Dunwoody attic. We seal every joint with mastic sealant, not tape that degrades in heat. Our sealing process is camera-verified, and we test static pressure before and after to prove the improvement. For homes in Vermack and near the Perimeter greenway corridors, where original ductwork has shifted and separated over decades, proper sealing often delivers the single biggest efficiency gain available without equipment replacement.
Metal Duct Repair
The Perimeter Center corridor brings substantial commercial and office-tower HVAC demand alongside Dunwoody’s residential base. Metal ductwork in these buildings develops leaks at seams and access panels, or corrodes where condensation collects. We repair galvanized steel and aluminum duct with proper mechanical fastening and sealed joints, then verify with camera inspection. For commercial clients in 30346 and along Ashford-Dunwoody Road, we schedule around business hours to minimize disruption.
Duct Insulation
Unconditioned attics in Dunwoody hit extreme temperatures in summer, and poorly insulated ducts sweat and lose capacity. We install closed-cell insulation or replace degraded fiberglass wrap on both flex and metal systems. This matters especially for Dunwoody’s older homes, where original insulation has compressed, torn, or been disturbed by decades of attic storage and maintenance access. Proper insulation prevents the condensation that accelerates mold growth during our 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.
Trusted Brands We Service in Dunwoody
We specify professional-grade equipment from Nikro, Honeywell, and Aprilaire, the same brands serious HVAC contractors use. For Dunwoody homeowners, this means we stock filter cabinets, media filters, and sealing materials sized for the heavy pollen loads our tree canopy produces. We don’t have to order parts and make you wait. Our trucks carry mastic sealant, rigid metal duct in standard diameters, and flex-duct support hardware, so most Duct Repair & Sealing in Dunwoody jobs are completed the same day we diagnose them.
Common Duct Repair & Sealing Problems We See in Dunwoody Homes
- Sagged and kinked flex-duct from decades of attic heat and gravity. Original 1970s-1980s installations in Georgetown and Dunwoody Club Forest were often strapped too loosely or routed with inadequate slope. Over 40 years, the duct sags into a U-shape that traps condensation and chokes airflow to specific rooms. We see this in roughly half the Dunwoody homes we inspect that still have original ductwork.
- Crushed or collapsed flex-duct where insulation compressed or homeowners stored items in the attic. Dunwoody’s ranch-style homes with large attic spaces tempt owners to use them for storage. A box or board laid across a flex duct compresses it flat. We find this frequently in the Branches and Vermack, where attics are accessible and have been used for decades.
- Leaking duct joints at the air handler or register boots, allowing conditioned air to escape into the unconditioned attic. Thermal expansion and contraction over 40 years loosen connections. In Dunwoody’s climate, that means 130°F attic air gets pulled into return leaks in summer, while heated air escapes through supply leaks in winter. Your system runs longer and wears out faster.
- Return-air grilles caked with compressed pine pollen and sweet-gum debris. Technicians working Dunwoody’s older subdivisions bordering the Dunwoody Nature Center and the Perimeter greenway corridors routinely pull grilles with visible, measurable loading that simply doesn’t appear at the same intensity in more paved-over Sandy Springs or Chamblee neighborhoods. This debris restricts airflow, strains the blower motor, and forces frequent filter changes.
Pricing for Duct Repair & Sealing in Dunwoody, GA
A typical duct sealing job in Dunwoody runs $280-$450 for a single system with accessible attic ductwork. Flex-duct repair or replacement of one to two runs costs $340-$580, depending on length and whether we need to re-route around obstacles. Full flex-duct replacement for an entire home generally falls between $1,800 and $3,200. Commercial metal duct repair in Perimeter Center buildings is priced by linear foot and accessibility, typically $45-$85 per foot of sealed or replaced duct.
What moves the price: attic accessibility, number of damaged runs, whether we can reuse existing register boots, and whether the air handler plenum itself needs resealing. We disclose every line item before starting. No changes at the door.
Standing offers for Dunwoody homeowners: $50 off any repair over $250, free second opinion on any written estimate, $89 seasonal tune-up, and a permanent 5% senior and veteran discount. Call (844) 685-6342 for an exact quote. Estimates are free.
We Also Serve Cities Near Dunwoody
Our service area extends to Sandy Springs, Brookhaven, Peachtree Corners, and Roswell. We carry the same parts inventory and same-day capability to these communities, though Dunwoody’s unique combination of aging flex-duct stock and heavy tree-debris loading remains our most specialized local focus.
Serving Dunwoody, GA - Our Local Coverage Area
We’re based in the Dunwoody 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 Dunwoody
Repair is often possible for one or two damaged runs, but if the entire system is original 1980s flex-duct, replacement is usually the better investment. We evaluate each run with camera inspection and give you an honest assessment of repair versus replacement costs. Call (844) 685-6342 for a free inspection and exact quote.
Yes, whistling typically indicates a kink, collapse, or separation that’s forcing air through a restricted opening. In Dunwoody homes with original flex-duct, we find this most often where sagging has created a pinch point near the air handler or where a duct has pulled away from a register boot. We locate the restriction with camera inspection and repair it, which usually eliminates the noise and restores proper airflow.
Dunwoody’s protected tree canopy produces significantly higher pollen and organic debris loads than less-wooded neighboring areas. Oak, sweet gum, and loblolly pine release massive amounts of material each spring, and the city’s tree-protection ordinances preserve an unusually dense canopy that filters into return-air systems. We recommend higher-capacity filtration and more frequent filter changes for Dunwoody homes, especially those near the Dunwoody Nature Center or Perimeter greenway corridors.
Yes, we work with blown insulation regularly in Dunwoody’s older homes. We move insulation aside to access joints, apply mastic sealant, verify with camera inspection, and replace the insulation properly. The work takes longer than with exposed ductwork, but the efficiency gains are substantial. We price this by the hour and disclose the estimate before starting.
Yes, we repair commercial metal ductwork throughout the Perimeter Center corridor. We seal leaks at seams and access panels, replace corroded sections, and verify with camera inspection. Scheduling is arranged to minimize disruption to your business operations. Call (844) 685-6342 to discuss your building’s specific configuration and get an estimate.
If your Dunwoody home still has original ductwork from the 1970s or 1980s, you’re not alone, and you’re not stuck with uneven temperatures and rising utility bills. We’ll inspect your system with a camera, show you exactly what we find, and give you one honest price before any work starts. Most repairs are done in a single visit. Call (844) 685-6342 for a free estimate.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Dunwoody since 1984.