Fast, Reliable Duct Repair & Sealing Across Marietta
Duct repair and sealing in Marietta typically runs $180-$650 depending on whether we’re sealing connections with mastic or replacing degraded flex duct, and most jobs are completed in a single visit. If your home was built during the 1980s or 1990s in East Cobb or along Roswell Road, there’s a fair chance your original builder-grade flex duct is past its design lifespan. We answer calls 24 hours a day at (844) 685-6342, and our technicians are usually on-site in Marietta within a few hours.
We’ve been driving these roads since 1984. We know the difference between the ranch homes off Canton Road in 30060 and the two-story subdivisions near Sewell Mill Creek in 30062. That local knowledge matters because the duct problems in those two homes are rarely the same. Our Duct Repair & Sealing team carries the equipment to fix flex duct, seal metal connections, and insulate runs in unconditioned attics, all in one trip. We don’t schedule a second visit to finish what should have been handled the first time.
Why Bellows Air Duct & Vent Co. Is Marietta’s Preferred Duct Repair & Sealing Company
We’ve served homeowners in Marietta for over 42 years. In that time, we’ve repaired ductwork in the crawl spaces off Powder Springs Street, sealed attic runs in the East Cobb subdivisions near Roswell Road, and replaced deteriorated flex duct in homes from the 1960s ranch era through the 1990s building boom. Our reputation here is built on showing up when we say and leaving the job done right.
Our customers in Marietta leave reviews that mention the same things: we answer the phone, we explain the price before we start, and we don’t leave until the camera inspection confirms the repair. The 90-Day Done Right Promise is stamped on every job. If something isn’t right, we return at no charge. No paperwork, no arguing.
Response time to Marietta is typically same-day. Our technicians live in the metro area, not dispatched from hours away. When you call (844) 685-6342, a live person answers, 24 hours a day. We’ll give you an honest arrival window and stick to it.
Our Duct Repair & Sealing Services in Marietta
Duct Sealing
Leaky duct connections waste 20-30% of conditioned air in a typical Marietta home, and that’s money lost to the attic or crawl space every month. We seal supply and return connections with mastic sealant, not tape that dries and fails. In the East Cobb subdivisions we serve, we regularly find original builder-grade tape failing on 30-year-old systems. Our sealing work is verified with a camera inspection before we leave, and it’s backed by our 90-Day Done Right Promise.
Flex Duct Repair
This is the service we perform most often in Marietta, and for specific reasons tied to this city’s housing stock. The 1980s-90s subdivisions in ZIPs 30062 and 30066 were built with flexible ductwork rated for roughly 25 years. Those ducts have now spent three decades in Georgia attics that exceed 140°F in summer. The plastic inner liner degrades, flakes, and sheds debris into your airstream. On a recent call in the East Cobb neighborhood of Sewell Mill Creek, we found a 1993 home where the flex duct inner liner was flaking plastic debris into the airstream. We sealed the leaky connections with mastic and repaired a crushed section in the unconditioned attic, but recommended full replacement due to the deteriorated liner. We carry flex duct, connectors, and insulation on every truck so we can repair or replace on the spot.
Metal Duct Repair
Older homes in the 30060-30064 ZIPs, particularly the 1960s-70s ranch and split-level construction, often have galvanized metal ductwork in crawl spaces or partial basements. These systems develop rust holes, separated seams, and loose dampers. We repair metal duct with proper sheet-metal patches and sealant, then verify with camera inspection. Marietta’s red Georgia clay subsoil holds moisture against crawl-space ducts, so we pay particular attention to corrosion points and recommend insulation upgrades where the original wrap has degraded.
Duct Insulation
Unconditioned attic ductwork in Marietta loses efficiency two ways: radiant heat gain in summer and condensation during humid cooling seasons. We install or replace duct insulation with materials rated for Georgia’s climate, focusing on the R-value and vapor-barrier integrity that prevents the mold points we see recurring in East Cobb homes. Proper insulation also reduces the load on your HVAC system, which matters in a city where air conditioning runs six months a year.
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 Marietta
We repair and seal ductwork connected to equipment from every major manufacturer, and we stock repair materials from Rotobrush, Nikro, and Abatement Technologies on our service vehicles. That means when we find a crushed flex run or a failed connection in your Marietta home, we don’t leave to order parts. We complete the repair during the same visit. For homeowners in East Cobb or off Canton Road, that translates to less time with your system down and no return-trip scheduling.
Common Duct Repair & Sealing Problems We See in Marietta Homes
- Inner-liner shedding in 1980s-90s flex duct. Builder-grade flex duct from the East Cobb building boom has reached end of life. The plastic inner sleeve flakes and sheds debris directly into the airstream. A cleaning call often becomes a repair or replacement recommendation once we camera-inspect the interior.
- Condensation-driven mold in unconditioned attic runs. Georgia’s 90°F+ summers with high dew points create persistent condensation inside flex ducts that lack proper insulation. We seal and insulate these runs to break the moisture cycle, not just clean the mold repeatedly.
- Particulate settling in oversized flex-duct runs. Post-1980 two-story homes in Marietta were often built with HVAC systems sized for lower-efficiency equipment, leaving duct runs larger than necessary. Debris settles in the low-velocity sections, and leaks re-entrain that debris after cleaning unless we seal the system.
- Moisture infiltration in crawl-space metal duct. The 1960s-70s ranch homes in 30060-30064 have partially accessible crawl-space ductwork sitting on or near Marietta’s red clay subsoil. That clay holds water, corroding metal seams and saturating insulation. We repair the metal and upgrade the moisture protection.
Pricing for Duct Repair & Sealing in Marietta, GA
We believe in one honest price, shown before we start. Here’s what duct repair and sealing costs in the Marietta market:
| Service | Typical Range in Marietta |
|---|---|
| Mastic sealing of accessible connections (per system) | $180-$340 |
| Flex duct repair (section replacement, per run) | $220-$450 |
| Metal duct patch/repair (per section) | $200-$380 |
| Duct insulation replacement (per run) | $160-$320 |
| Full flex duct replacement (typical 3-4 bedroom home) | $1,800-$3,400 |
What moves the price: accessibility (attic vs. crawl space), extent of deterioration, and whether we’re repairing sections or replacing the full system. Homes in East Cobb with original 1990s flex duct often need more extensive work than the 1970s ranch with accessible metal duct off Powder Springs Street. We inspect with a camera, show you what we find, and give you the full price before any work begins. Estimates are free. Call (844) 685-6342 to schedule.
Current offers: $50 Off Any Repair Over $250; Free Second Opinion on Any Written Estimate; permanent 5% Senior and Veteran discount.
We Also Serve Cities Near Marietta
Our service area extends to Fair Oaks, Smyrna, Kennesaw, and Sandy Springs. If you’re in one of these communities and found this page searching for Duct Repair & Sealing in Marietta, we cover your area too. Same technicians, same equipment, same upfront pricing.
Serving Marietta, GA - Our Local Coverage Area
We’re based in the Marietta 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 Marietta
The original builder-grade flex duct in your home’s era was rated for roughly 25 years and has now spent 30-35 years in Georgia attics that exceed 140°F. The inner liner degrades and sheds debris, so cleaning removes today’s buildup but the duct continues generating new contamination. We camera-inspect to determine whether repair or full replacement is the honest recommendation. Call (844) 685-6342 for a free inspection.
We can seal the connections and repair damaged sections, but mold inside the flex duct liner indicates the inner barrier has failed. Sealing alone won’t stop recurrence because the porous material continues trapping moisture. We show you the camera footage and explain whether repair plus insulation upgrade will suffice, or if replacement is the only permanent fix. Estimates are free.
Georgia’s red clay subsoil holds moisture against crawl-space ducts, accelerating rust on metal systems and saturating insulation on any type. We see this particularly in the 30060-30064 ZIPs with 1960s-70s ranch homes. Our repairs include corrosion treatment, proper drainage assessment, and moisture-barrier upgrades specific to clay-soil conditions. Call for an inspection of your crawl-space system.
This question belongs to our garage door division. For ductwork in detached workshops, outbuildings, or converted barns on Marietta’s acreage properties, we absolutely repair and seal those systems. Many rural Marietta properties have HVAC extended to workshops with flex duct running through unconditioned spaces, creating the same heat-degradation and condensation issues we see in main homes. We handle these in one trip, same as any residential call.
Repair is worth it when the flex duct liner is intact and only connections or sections are damaged. Replacement is the honest recommendation when the inner liner is flaking, brittle, or mold-permeated, because repairs won’t outlast the underlying material failure. We camera-inspect and show you exactly what we’re seeing before you decide. Our $50 Off Any Repair Over $250 offer applies to qualifying repair work. Call (844) 685-6342 for an exact quote.
We’re here when you need us. A live person answers at (844) 685-6342, 24 hours a day. We’ll schedule your free estimate, show up when we say, and leave your ductwork sealed, repaired, and camera-verified. Done right, and backed in writing for 90 days.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Marietta since 1984.