Fast, Reliable Duct Repair & Sealing Across Roswell
Duct repair and sealing in Roswell typically costs $280-$650 for most residential jobs, with flex duct repairs starting around $320 and full system mastic sealing running $480-$920 depending on home size. Most Roswell homes we serve are completed in a single visit. Call (855) 305-5564 for a free estimate - we’ll give you the exact number before any work begins.
We’ve been driving out to Roswell since 1984, back when Holcomb Bridge Road was still two lanes through much of town. Our technicians know the difference between a 1987 Horseshoe Bend colonial with original fiberglass duct board and a 1995 traditional off Eves Road with metal trunk lines - and that difference matters for how we approach your repair. Roswell sits 25 miles north of our Atlanta office, which means we’re usually on your doorstep within 45 minutes of your call, whether you’re in 30075, 30076, or 30077.
Our Duct Repair & Sealing team handles everything from cracked mastic seals in attic flex runs to full liner replacement in aging duct board systems. We don’t do bait pricing, and we don’t send salespeople. You talk to a technician who can actually do the work.
Why Bellows Air Duct & Vent Co. of Atlanta Is Roswell’s Preferred Duct Repair & Sealing Company
Roswell homeowners have been calling Bellows for over 42 years because we treat older homes with the respect they require. We’ve worked in subdivisions where the original ductwork has outlasted three HVAC units, and we know when to seal what’s there versus when to tell you honestly that replacement makes more sense.
Our reviews from Roswell customers consistently mention the same things: we show up when we say we will, we explain what we’re seeing in plain language, and the price on the phone matches the price on the invoice. No one likes surprises after a technician has been crawling through their attic for two hours.
Response time to Roswell is typically same-day or next-morning. Calls are answered by a live person, 24 hours a day - not a voicemail tree, not an app. If your second-floor zone has gone dead in July or you’re hearing air hiss from a disconnected duct in your crawlspace, that matters.
We also understand the local conditions that age Roswell ductwork faster than inland suburbs. The Chattahoochee River corridor creates persistent humidity that cycles through your attic and crawlspace, degrading mastic and flex duct connections years sooner than in drier areas. Our crews carry the right sealants and replacement materials for this environment - not generic stock that fails in six months.
Our Duct Repair & Sealing Services in Roswell
Duct Sealing
Most Roswell homes we seal are losing 20-30% of conditioned air through gaps at joints, plenum connections, and register boots. In a 4,000-square-foot colonial off Crabapple Road, that translates to rooms that never reach temperature and a system that runs constantly. We seal with mastic compound and reinforced mesh at all accessible joints, then pressure-test to verify results. Our camera inspection shows you the before and after - no claims without proof.
Flex Duct Repair
Flex duct is common in Roswell’s 1980s and 1990s builds, especially in long attic runs to second-floor zones. After 30+ years, the inner liner cracks, insulation compresses, and connections sag. We recently sealed a leaking flex duct junction in a 1989 colonial on Azalea Drive, where the original mastic had cracked from 30+ years of humidity cycling, allowing conditioned air to escape into an unconditioned crawlspace. Our crew cut out the damaged section, replaced it with new insulated flex duct, and applied fresh mastic sealant at all joints, restoring full airflow to the second-floor zone. Flex duct repair in Roswell typically runs $320-$580 depending on linear footage and accessibility.
Metal Duct Repair
Sheet metal trunk lines hold up longer than flex, but they’re not immune. We see rust-through at condensation points in Roswell’s humid summers, separated seams from decades of thermal expansion, and failed tape at takeoff connections. Metal repairs require cutting, patching, and proper sealing - we use Nikro equipment for access and Honeywell-grade mastic for permanent bonds. Most metal repairs in Roswell fall between $380 and $720.
Mastic Sealant Application
Mastic is the only sealant we trust for permanent duct sealing. Tape dries and fails; mastic remains flexible. In Roswell’s humidity-cycling environment, this matters enormously. We brush or spray mastic at all joints, boots, and plenum connections, then embed fiberglass mesh at stress points. A full mastic sealing job for a multi-zone Roswell home typically runs $480-$920 and takes 4-6 hours.
Duct Insulation
When we open an attic in Horseshoe Bend or Martin’s Landing, we often find insulation that’s compressed, moisture-damaged, or simply missing from retrofitted sections. We replace with foil-faced fiberglass wrap rated for Georgia’s climate, sealed at all seams. Proper insulation reduces condensation and protects the mastic work beneath it.
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 Roswell
We carry Rotobrush inspection systems and Nikro HEPA equipment on every truck, and we stock Honeywell and Aprilaire sealants and replacement materials specifically for the humid conditions along Roswell’s river corridor. This isn’t about brand names for their own sake - it’s about having the right material on the truck when your technician opens the attic hatch, so we’re not making a run to the supply house while your house sits open. Most Roswell jobs are completed in a single visit because we planned for what we’d find.
Common Duct Repair & Sealing Problems We See in Roswell Homes
- Fiberglass duct board liner delamination. In Roswell’s Horseshoe Bend subdivision, 35-year-old fiberglass duct board liners frequently delaminate due to persistent river-corridor humidity, turning standard cleaning calls into duct replacement conversations - a condition far less common in newer Alpharetta subdivisions built with sealed metal trunk lines. Once the liner separates from the shell, no cleaning or sealing can restore it safely.
- Cracked mastic seals at flex duct junctions. Years of humidity cycling in Roswell’s attic spaces harden and crack the original mastic, creating gaps where conditioned air pours into unconditioned areas. Homeowners notice it as rooms that won’t cool or heat properly, or as unexpectedly high utility bills.
- Disconnected multi-zone duct runs. The large homes built during Roswell’s 1980s-1990s boom often have complex dual or triple-zone systems with long flex runs connected by spring-loaded fasteners. After three decades, corrosion and vibration separate sections entirely. We find complete breaks in attic runs that the homeowner only noticed as “the upstairs never works right.”
- Condensation damage in crawlspace ducts. Roswell’s humid subtropical summers create recurring condensation inside older ductwork, especially in vented crawlspaces. The outer insulation becomes waterlogged, the inner liner deteriorates, and mold becomes a realistic concern - making mold and mildew remediation a realistic add-on to routine cleaning calls in ways less common in drier inland suburbs.
Pricing for Duct Repair & Sealing in Roswell, GA
Here’s what duct repair and sealing actually costs in Roswell’s market:
| Service | Typical Range |
|---|---|
| Flex duct repair (single run, attic) | $320-$580 |
| Metal duct patch and seal | $380-$720 |
| Mastic sealing (full system, 2-zone) | $480-$920 |
| Duct board liner replacement (per section) | $650-$1,200 |
| Full duct insulation wrap | $520-$980 |
What moves you within these ranges: linear footage of ductwork, attic accessibility (steep pitches and tight scuttles add time), number of zones, and whether we find delaminated liner that requires replacement rather than sealing. We inspect with a camera before quoting, so you see what we see. Our $50 Off Any Repair Over $250 applies to most jobs, and we offer a permanent 5% Senior and Veteran discount. Estimates are free. Call (855) 305-5564.
We Also Serve Cities Near Roswell
Our crews work daily in Roswell, Alpharetta, Johns Creek, Milton, and Sandy Springs. The same technician who knows your Horseshoe Bend duct system likely worked in a comparable home in Johns Creek or Alpharetta last week. We don’t dispatch from a call center in another state - our office is in Atlanta, and our trucks are stocked for the specific conditions of north metro homes.
Serving Roswell, GA - Our Local Coverage Area
We’re based in the Roswell 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 Roswell
Homes in Roswell’s 30075 and 30076 ZIP codes with original 1980s-1990s ductwork should be inspected every 3-5 years and sealed as needed. The combination of age, river-corridor humidity, and heavy pollen loading degrades connections faster than in newer construction. If your home still has fiberglass duct board, annual inspection is prudent - liner delamination can progress from minor to replacement-requiring quickly. Call (855) 305-5564 to schedule a camera inspection; estimates are free.
Yes, but indirectly. Sealing prevents unfiltered air from being drawn into leaky return ducts through attic or crawlspace gaps, which is where much of Roswell’s oak and pine pollen enters the system. Proper sealing ensures all air passes through your filter. In neighborhoods near the Chattahoochee Nature Center, where pollen counts regularly spike above metro averages, this matters more than in paved-over suburbs. For direct pollen reduction, pair sealing with a quality air cleaner - we can assess both during your visit.
Delaminated liner cannot be repaired - it must be replaced. Once the fiberglass separates from the duct board shell, any cleaning or sealing attempt releases fibers into your airflow. We replace the affected section with new duct board or transition to metal, then seal properly. This is a common finding in Horseshoe Bend and similar river-corridor neighborhoods. We’ll show you the camera footage and explain exactly which sections need replacement versus which can be sealed. Call (855) 305-5564 for an honest assessment.
We use Honeywell and Aprilaire mastic compounds, selected specifically for flexibility and adhesion in humid environments like Roswell’s. These are the same products serious HVAC contractors specify - not hardware-store tape that fails in two seasons. Our technicians apply by brush or spray depending on access, with fiberglass mesh reinforcement at stress points. The work is backed by our 90-Day Done Right Promise: if a seal fails, we return at no charge with no paperwork required.
Most jobs in Roswell’s larger homes take 4-7 hours and are completed in a single visit. A straightforward mastic sealing of accessible joints might finish in 4 hours; a home with multiple disconnected flex runs and delaminated sections could extend to a full day. We don’t rush - we seal it right the first time because crawling back through your attic twice helps no one. You’ll know the time estimate before we start, along with the exact price. Background-checked, uniformed technicians; live person answering the phone 24/7. Call (855) 305-5564.
Ready to stop losing conditioned air to your attic? Call Bellows Air Duct & Vent Co. of Atlanta at (855) 305-5564 for a free estimate on duct repair and sealing in Roswell. We’ll inspect with a camera, explain what we find, and give you one honest price before any work begins. Our 90-Day Done Right Promise means we stand behind it - no paperwork, no arguing. We’ve been serving Roswell homeowners since 1984, and we’re not going anywhere.
Written by Cliff Darden, Owner at Bellows Air Duct & Vent Co. of Atlanta, serving Roswell since 1984.