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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Repair & Sealing Across Decatur
Duct repair and sealing in Decatur typically costs $280-$650 for most residential jobs, with flex duct replacement in crawl spaces running toward the higher end due to access difficulty. Our crews are dispatched from the Atlanta office and carry the equipment to repair, seal, and document every run on the same visit. We know Decatur’s housing stock because we’ve worked inside it - the 1920s craftsman bungalows of Oakhurst, the mid-century ranches along Winnona Park’s tree-lined streets, and the stacked systems in condo buildings near the square. Call (470) 516-9337 and we’ll put a written price in your hand before any panel comes off.
Why CleanRun Air Duct Cleaning Marietta Is Decatur’s Preferred Duct Repair & Sealing Company
We’ve been inside enough Decatur crawl spaces to know the failure patterns by heart. The flex duct stapled under Oakhurst bungalows during the 1970s renovation wave. The metalized tape dried to powder in 2nd Avenue attics. The return collars pulling red-clay soil air instead of conditioned air. That knowledge matters because it lets our crew diagnose faster and quote accurately - no exploratory fees, no “we’ll see what we find.”
Our Duct Repair & Sealing team holds a strong local reputation built on documentation, not promises. Every Decatur customer receives a written price before work starts (Haven Standard Clause 1), a photo record of every duct run before and after, and the 365-Day Done Right Promise in writing. Technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews.
Scheduling runs through our Atlanta office, but crews carry Decatur-specific parts inventory: flex duct in common diameters, mastic sealant rated for Georgia humidity, and metalized tape that won’t degrade in crawl-space conditions. Most Decatur appointments are scheduled within a week, with written confirmation sent same-day.
Our Duct Repair & Sealing Services in Decatur
Duct Sealing
Decatur’s retrofit duct systems leak at connection points that were never designed for the airflow they now carry. We seal supply and return plenums (the main distribution boxes), trunk-line takeoffs, and register boots using mastic sealant - a thick, fiber-reinforced paste that bridges gaps tape can’t cover - followed by metalized tape at high-stress joints. In crawl-space systems common to Oakhurst and Winnona Park, we pressurize the sealed system and verify with a duct-blaster test so the homeowner sees the leakage reduction in CFM (cubic feet per minute), not just hears about it.
Flex Duct Repair
This is the service we perform most often in Decatur’s core neighborhoods. The flex duct installed during the late-1970s and early-1980s renovation boom is now 40-plus years old: the inner liner cracks, the insulation compresses, and the wire helix sags until the duct kinks or separates at the collar. Our crew cuts out failed sections, installs new flex with proper support straps every four feet, and seals with mastic at the plenum connection - not tape alone, which fails in Decatur’s humidity. We photograph every repair so the homeowner sees what was removed and what replaced it.
Metal Duct Repair
Decatur’s 1950s-60s ranch homes often retain original galvanized steel trunk lines with deteriorated flex branch runs. We repair separated trunk seams, replace rusted sections, and rebuild takeoff connections where the original sheet metal has thinned. Metal duct in Decatur’s humid crawl spaces corrodes from the outside in - condensation wicks through compromised insulation and pools against the steel - so our repairs include re-wrapping with fresh insulation and vapor barrier.
Duct Insulation & Air Leak Repair
When Decatur’s extreme humidity pushes indoor relative humidity above 60%, uninsulated or poorly sealed ductwork sweats in crawl spaces and shallow attics. That moisture breeds mold inside the duct and saturates surrounding framing. We repair air leaks at the source - separated collars, punctured flex, failed register boots - then reinsulate with closed-cell sleeve or foil-faced wrap rated for the application. The goal is stopping the moisture pathway, not just treating the symptom.
Mastic Sealant Application
In Decatur’s older homes, we apply mastic sealant (the brush-on, fiber-reinforced compound) at every joint and seam we can access. Unlike tape, mastic remains flexible through Georgia’s temperature swings and won’t delaminate in crawl-space humidity. We specify mastic on every Decatur estimate where crawl-space access is involved - it’s the only sealant we trust for subfloor installations over red clay.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Decatur
Our equipment roster includes Nikro negative-air machines and HEPA filtration systems, Honeywell media air cleaners installed at the return plenum, and Aprilaire humidifier and dehumidifier components integrated with sealed duct systems. We stock common flex duct diameters, collar sizes, and mastic compounds locally so Decatur jobs aren’t delayed waiting on parts. Every brand we name can be verified independently - we don’t use equipment we can’t document.
Common Duct Repair & Sealing Problems We See in Decatur Homes
- Late-1970s flex duct sagging in Oakhurst crawl spaces. Stapled into low crawl spaces during the neighborhood’s first gentrification wave, these runs now hang below support straps, kink at elbows, and separate at takeoffs - pulling damp, soil-laden air directly into the living space instead of conditioned air from the handler.
- Retrofit duct runs concealed behind original plaster walls. Pre-WWII bungalows on 2nd Avenue and Winnona Park weren’t built for central air, so installers routed flex through wall cavities with minimal access. Tears and leaks go undetected until mold appears on interior walls or humidity spikes in specific rooms.
- Shared dryer vent stacks in Decatur condos and apartments. Dense housing near the square routes multiple units through a single vertical duct. Lint compacts in the horizontal transitions between floors, restricting airflow and creating fire risk - but the shared pathway requires coordinated access and specialized negative-pressure extraction equipment to clean and seal properly.
- Red-clay moisture wicking into crawl-space returns. DeKalb County’s clay soil holds water for days after rain. When return-side ducts leak under pressure, they draw that moisture-laden air into the system, raising indoor humidity and loading the evaporator coil with particulate that standard filters won’t catch.
Pricing for Duct Repair & Sealing in Decatur, GA
Most Decatur duct repair and sealing jobs fall between $280 and $650. Here’s how that breaks down for the work we perform most often:
| Service | Typical Range in Decatur |
|---|---|
| Duct sealing (mastic + tape, single system) | $280-$420 |
| Flex duct repair/replacement (per run, crawl space) | $180-$340 |
| Metal trunk repair with insulation rewrap | $340-$550 |
| Full system seal with duct-blaster verification | $480-$650 |
| Shared dryer vent stack cleaning + sealing (condo) | $220-$380 |
What pushes a Decatur job toward the higher end: crawl-space access requiring temporary vapor-barrier removal, multiple failed flex runs in a single system, or repair behind plaster where wall access is needed. What keeps it lower: straightforward register-boot sealing or single-run flex replacement with clear access. Every estimate is written and delivered before work starts - no per-vent pricing, no add-ons once the truck is on your street. Call (470) 516-9337 for a free estimate; we’ll inspect, photograph, and price on the same visit.
We Also Serve Cities Near Decatur
Our crews work throughout metro Atlanta, including Decatur and neighboring Atlanta, Smyrna, Marietta, and Roswell. Each city’s housing stock brings different duct failure patterns - we carry the parts and protocols for all of them.
Serving Decatur, GA - Our Local Coverage Area
We’re based in the Decatur 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 Decatur
Because the leak has usually been pulling humid crawl-space air for months before anyone notices. Decatur’s combination of 40-year-old flex duct, red-clay soil moisture, and Georgia humidity means separated collars don’t just waste energy - they create a steady moisture injection point inside the duct. By the time a homeowner smells mustiness in the back bedroom, the inner liner is often colonized. We photograph the mold, seal the leak source, and can recommend whether sanitizing is warranted based on what the camera shows - not a blanket upsell. Call (470) 516-9337 for an inspection and written scope.
Yes, and we plan for it. Oakhurst’s narrow streets and Winnona Park’s limited driveway access mean our crew arrives in compact vans, not box trucks, and carries equipment by hand when needed. We coordinate with Decatur homeowners about street parking, shared driveways, and HOA access requirements before the appointment. If your home has a locked crawl-space hatch or basement access through a rear alley, we note that during scheduling so the technician arrives prepared - not improvising on your porch.
Yes, but shared stacks require a different approach than single-family systems. We use Nikro negative-pressure extraction equipment to pull lint from the full vertical run without disassembling connections between units, then seal accessible joints with mastic to prevent future leakage. We also document the vent interior with photos you can share with your HOA or building manager. Coordinated access across multiple units may be needed; we’ll outline what’s required in our written estimate. Call (470) 516-9337 to discuss your building’s specific configuration.
We camera-inspect the full run and judge based on three factors: liner integrity (cracks or delamination), insulation condition (compression or water saturation), and structural support (sagging, kinking, or helix corrosion). If the liner is intact and only the collar has failed, repair with mastic and re-support is cost-effective. If the liner is crumbling or the insulation is waterlogged, replacement is the only durable fix. We show you the camera footage and explain which category your system falls into - no recommendation without evidence.
MERV 11 is the practical ceiling for most Decatur residential systems - high enough to catch spring pine pollen (which Atlanta metro air routinely ranks among the nation’s worst for) without restricting airflow and straining the blower. MERV 13 filters finer particles but can overload older blowers common in Decatur’s retrofitted systems. After we seal your ductwork, reducing leakage means more of your conditioned air actually passes through the filter instead of bypassing it through gaps - so the filter you have works harder. We note the optimal MERV for your specific system on the written job record. Call (470) 516-9337 if you’re unsure what your handler can support.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Decatur since 2013.