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 Dunwoody
Duct repair and sealing in Dunwoody typically costs $280-$750 for most single-family homes, with flex duct replacement running higher when multiple runs have collapsed in unconditioned attic space. Most jobs are scheduled within a week, and our crews carry the equipment to seal, repair, or rebuild ductwork on the same visit. Call (470) 495-9370 for a written estimate before any work starts.
We know Dunwoody’s housing stock. The neighborhoods off Chamblee-Dunwoody Road, the ranches tucked behind Georgetown’s cul-de-sacs, and the townhome clusters near Perimeter Mall all present different duct problems. Our Duct Repair & Sealing team has worked in enough Dunwoody attics to recognize the pattern: 1970s flex duct, minimal hanger spacing, and decades of Georgia heat cooking the inner liner until it separates at the sag points. Dispatch and scheduling are coordinated from our Atlanta office, but the crews serving Dunwoody live in the metro area and know the local roads, building types, and the access constraints that come with them.
Why CleanRun Air Duct Cleaning Atlanta Is Dunwoody’s Preferred Duct Repair & Sealing Company
CleanRun has served Dunwoody since we opened in 2013. In neighborhoods like Dunwoody Club Forest, Dunwoody North, and Georgetown, homeowners recognize our trucks and our process: a written price delivered before a single panel comes off, background-checked technicians in uniform identified by name before arrival, and a Documented Photo Record of every duct run included as standard.
Our reviews from Dunwoody customers consistently mention the photo record. They expected a verbal summary; they received timestamped images of their own ductwork, before and after, with the written scope and price agreed upfront. Haven Standard Clause 1 requires it. No manager approval needed.
Response time to Dunwoody is typically 3-5 business days for standard scheduling, with flexibility for homeowners who need specific windows due to HOA restrictions or building access limitations. We do not promise same-day dispatch because duct repair is a scheduled job requiring proper equipment staging, not a race.
Local knowledge matters here. Dunwoody’s 30338 and 30360 ZIP codes contain some of the most consistent 1970s-1980s housing stock in metro Atlanta. We have opened enough attics in these homes to know where the original builder skimped on hanger spacing, where the south-facing roof planes create the worst heat exposure, and which condo developments on Ashford-Dunwoody Road share vent stacks that complicate individual unit service.
Our Duct Repair & Sealing Services in Dunwoody
Duct Sealing
Dunwoody’s original flex duct systems were sealed at the factory with adhesive that degrades after 25-30 years in attic heat. We seal leaking joints and separated liners with mastic sealant, metal collars, and mechanical fasteners rated for the temperature swings these attics see. A typical duct sealing job in Dunwoody runs $280-$450 for a single-system home, with the written price covering all accessible joints in the attic, not per-register pricing that balloons once the crew arrives.
Flex Duct Repair
This is the service we perform most often in Dunwoody. The 1970s-1980s flex duct in neighborhoods like Dunwoody Club Forest and Dunwoody North has reached or exceeded its service life. Inner Mylar liners separate. Insulation sags and compresses. We remove the failed sections under negative-pressure extraction, install new R-8 flex on proper support hangers spaced to prevent sag-and-trap points, and connect with metal collars and mastic. Flex duct repair in Dunwoody typically ranges $320-$680 depending on how many runs have collapsed and whether the plenum connection also needs rebuilding.
Metal Duct Repair
Some Dunwoody homes, particularly earlier construction in Georgetown and certain townhome clusters, have galvanized metal trunk lines with spot-welded seams that have rusted through or separated. We cut out corroded sections, fabricate replacement metal to fit, and seal with mastic and fiberglass mesh. Metal duct repair runs $400-$750 in Dunwoody when trunk line replacement is involved.
Duct Insulation
Unconditioned Dunwoody attics exceed 130°F in summer. Compromised insulation means condensation on cold duct surfaces, mold risk, and thermal loss that drives up energy bills. We replace degraded insulation with R-8 flex or wrap existing metal with foil-faced fiberglass, sealed at all seams. Duct insulation work in Dunwoody typically falls between $350-$600 for a full system.
Air Leak Repair
When a Dunwoody homeowner’s energy bills spike or rooms won’t hold temperature, we pressurize the system and locate leaks with smoke pencil and thermal imaging. Air leak repair addresses the gaps between duct sections, plenum connections, and register boots that bypass conditioned space entirely. Most Dunwoody air leak repairs run $250-$480, with the full leak map documented in the photo record.
Mastic Sealant Application
Mastic is the standard for durable duct sealing in hot attics, outperforming tape long-term. We brush or trowel mastic onto every joint and seam, with fiberglass mesh reinforcement at stress points. This is included in our duct sealing and flex duct repair services, not sold as an add-on.
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 Dunwoody
CleanRun stocks parts and uses equipment from Nikro, Honeywell, Aprilaire, and Abatement Technologies on Dunwoody jobs. Nikro negative-pressure extractors handle the source removal when we rebuild collapsed flex runs. Honeywell and Aprilaire media filters and whole-home air cleaners integrate with the sealed systems we deliver. Abatement Technologies HEPA-filtered containment supports our work in Dunwoody condos where shared mechanical spaces require dust control. We do not show up hoping the local supply house has what we need. The equipment roster is fixed, documented, and verifiable.
Common Duct Repair & Sealing Problems We See in Dunwoody Homes
- Collapsed flex duct in 1970s-1980s attics. The original hanger spacing in Dunwoody ranches and split-levels was often 8-10 feet, far enough for flex to sag between supports. Those low spots trap red-clay dust, pine pollen, and condensation until the inner liner separates. We regularly find homes in Dunwoody Club Forest running unsealed for years.
- Shared dryer-vent stacks in condos and townhomes. Near Perimeter Mall and along Ashford-Dunwoody Road, multi-unit buildings vent through common stacks. One unit’s lint load backs into neighbors’ runs. A clean dryer trap means nothing when the blockage is three floors down in the shared pathway.
- Restricted equipment access in dense developments. Narrow shared driveways and limited visitor parking in Dunwoody’s townhome clusters force longer hose runs from truck to air handler. This reduces vacuum efficiency at far registers and requires additional staging time, which we account for in the written price, not as a surprise surcharge.
- Mold colonization from compromised insulation. Dunwoody’s humid summers and dense tree canopy create sustained high dew points. Where attic duct insulation has torn or compressed, cold metal or exposed liner sweats. The result is recurrent mold that homeowners smell before they see it, particularly in Georgetown homes with original insulation.
Pricing for Duct Repair & Sealing in Dunwoody, GA
We publish ranges because Haven Standard Clause 1 requires a written price before work starts. Here is what duct repair and sealing costs in Dunwoody’s market:
| Service | Typical Range in Dunwoody |
|---|---|
| Duct sealing (mastic, joints, accessible seams) | $280-$450 |
| Air leak repair (pressurized leak detection + sealing) | $250-$480 |
| Flex duct repair (1-3 runs, with hangers) | $320-$680 |
| Flex duct replacement (full system, 4+ runs) | $750-$1,400 |
| Metal duct repair (trunk line section) | $400-$750 |
| Duct insulation replacement (full system wrap) | $350-$600 |
What moves a Dunwoody job higher in these ranges: multiple collapsed runs requiring source removal, plenum rebuilds, restricted access lengthening labor time, or shared-vent stack work in condos needing coordination with building management. What does not affect price: per-vent surcharges, “discovered” problems after work begins, or equipment fees. The price we write is the price you pay. Every estimate is free, and we offer a Free Second Opinion on any competitor’s written quote. Call (470) 495-9370 to schedule.
We Also Serve Cities Near Dunwoody
Our crews work throughout the metro area. Homeowners in Dunwoody and surrounding communities, including Atlanta, Decatur, North Atlanta, and Smyrna, receive the same written-price-first service, the same Documented Photo Record, and the same 365-Day Done Right Promise. Equipment and staffing are positioned to reach these markets without the scheduling delays that come from single-crew operations.
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
We can clean and inspect your individual branch line up to the common stack, but we cannot guarantee full airflow if the blockage is in the shared portion. We document what we find with the camera and provide the photo record to you and your HOA if needed. For shared-stack buildings near Perimeter Mall and along Ashford-Dunwoody Road, we recommend coordinating with building management for full-stack access. Call (470) 495-9370 and we will review your building’s vent configuration before scheduling.
The signs are usually uneven heating or cooling, dust accumulation on registers that returns after cleaning, and a blower motor that runs longer than it should. In Dunwoody’s 1970s-1980s housing stock, the failure mode we see most is inner liner separation at sag points in the attic, meaning conditioned air is mixing with unfiltered attic air before reaching your rooms. We confirm this with camera inspection, included in our estimate process. Call (470) 495-9370 to schedule a look.
Yes, or a loading zone within reasonable hose reach of your air handler. Restricted parking in Dunwoody’s denser townhome clusters means we sometimes stage equipment farther from the entry than in single-family homes. This lengthens setup time and reduces vacuum efficiency at distant registers, which we account for in the written price. We will confirm access constraints when you call and plan accordingly.
Mastic sealing is sufficient for intact ductwork with leaking joints, which is common in Georgetown homes where the original installation was competent but the adhesive has aged out. If the inner liner has separated or the flex has collapsed at sag points, sealing alone will not restore a closed pathway; those sections need repair or replacement. We determine which applies with camera inspection, and we write the scope and price before starting either approach.
Yes, the localized pollen load is measurably higher. Dunwoody’s protected urban tree canopy, while a genuine civic asset, concentrates oak, pine, and grass pollen in ways that newer, less-wooded suburbs to the north do not experience. When your duct system is sealed and filtered properly, that pollen load is managed at the return. When the ductwork has leaks or collapsed sections, unfiltered attic air, pollen included, enters the living space continuously. This is why we emphasize full system sealing in Dunwoody specifically, not just cleaning.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Atlanta, serving Dunwoody since 2013.