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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After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Roswell
Duct sealing in Roswell typically costs $400 – $1,200 for a whole-system seal, depending on whether we’re repairing accessible flex runs in a crawlspace or resealing a full metal trunk-and-branch system in an attic. Most Roswell jobs take four to six hours, and our Duct Sealing team dispatches from our Atlanta office with crews that know the difference between a 1920s mill cottage on Canton Street and a 1995 subdivision home off Holcomb Bridge Road.
We’ve been driving to Roswell since 2004. We know the traffic patterns, the pier-and-beam crawlspaces that flood after spring rains along the Chattahoochee, and the specific way pollen season here clogs returns that pull from vented crawlspaces. When you call (361) 326-5060, a live person answers. We’ll give you a written price before we touch anything, and we back every seal with our 365-Day Done Right Promise.
Why Hollis Air Duct Cleaning Is Roswell’s Preferred Duct Sealing Company
Roswell homeowners call us back because we show up inside the window, in uniform, and we price the job in writing before the mastic comes out. No estimates that balloon once we’re in your crawlspace. That’s The Garrison Standard, and it’s how every Hollis location operates, including the crews that serve Roswell.
Our technicians are background-checked and trained on the equipment we actually carry: Rotobrush rotary systems for agitation inside old galvanized trunks, Nikro negative-air machines for controlled debris removal, and sealing products from Abatement Technologies and Guardsman. We don’t send a kid with a shop vac and a roll of tape.
The 365-Day Done Right Promise means if a seal we applied fails within a year, we return and make it right at no charge, including a free second visit. We put that in writing on every job. Most competitors in the Roswell market won’t match that in print.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule.
Air Duct Sealing in Roswell
Air Duct Sealing in Roswell is not a one-size-fits-all job. In the Historic District, we often find original galvanized trunks from the 1920s that have been spliced with flex duct during decades of renovation. Those flex runs frequently terminate blindly in pier-and-beam crawlspaces that double as rodent corridors along the Chattahoochee River corridor. Sealing over those terminations without finding them first just pressurizes your crawlspace and pushes humid, organic-laden air into your living space.
In east Roswell subdivisions built between 1985 and 2005, the rigid metal trunk-and-branch systems are structurally sound but leak at every joint where thermal expansion and construction debris have degraded the original tape. Those systems need source removal first, then mechanical sealing with mastic and mesh, not a quick spray of aerosol sealant that ignores what’s inside the duct.
Mill-Era Duct Systems
Original mill cottages and bungalows near Mimosa Boulevard often have supply trunks that were never extended when rooms were added. We camera-inspect every run before we seal. If we find a blind termination, we map it, explain it, and give you a written price to extend or cap it properly. Sealing without this step makes your air worse, not better.
Subdivision Metal Systems
The rigid metal systems in east Roswell homes hold pressure well once sealed, but only after we clear construction debris and rodent nesting from the attic runs. We use Nikro negative-air machines to contain that debris during cleaning, then seal with mastic rated for Georgia’s humidity cycles.
Duct Sealing Services in Roswell
Duct Sealing Services in Roswell cover three distinct scopes: spot repair of accessible flex runs in crawlspaces, whole-system mechanical sealing of metal trunk-and-branch systems in attics, and remediation of disconnected or crushed runs found during camera inspection. A typical spot repair runs $400 – $650. Whole-system sealing on a 2,500-square-foot home with attic ductwork runs $800 – $1,200. If we find blind terminations or crushed flex that needs replacement, we’ll show you the camera footage and write a separate price before we proceed.
We don’t quote per-vent prices. That’s the bait-and-switch model. We quote one flat price per system, agreed in writing before work starts. What we quote is what you pay.
Camera Inspection and Mapping
Every Roswell job starts with a camera. We feed it through the supply and return sides to find disconnections, crushed runs, and debris accumulation. You see what we see. Then we write the price. No surprises at the door.
Mechanical Sealing with Mastic
We seal with brush-applied mastic and fiberglass mesh, not tape that dries and fails in Georgia’s humidity. For metal systems, we seal every joint, seam, and penetration. For flex, we replace damaged sections and seal connections with proper clamps and mastic, not zip ties.
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 Roswell
We carry professional-grade equipment on every Roswell truck: Rotobrush rotary brush systems for agitation inside old galvanized trunks, Nikro negative-air machines for debris containment during cleaning, and sealing and filtration products from Abatement Technologies and Guardsman. These are the same tools commercial crews use in hospitals and schools, not hardware-store gear. We stock mastic, mesh, and replacement flex in common diameters so most Roswell jobs finish in one visit. If your system uses Honeywell or Aprilaire filtration components, we can inspect and reseal the filter rack while we’re in the plenum. Fast turnaround matters in Roswell because your HVAC runs nine months a year. You don’t need us coming back twice because we didn’t have the right materials on the first truck.
Common Duct Sealing Problems We See in Roswell Homes
- Sealing over mill-era galvanized without source removal. The original trunks in Historic District homes have decades of organic debris and moisture trapped inside. Mastic applied over that debris just seals it in. We negative-air clean first, then seal.
- Flex runs chewed open in pier-and-beam crawlspaces. The Chattahoochee corridor has heavy rodent pressure. We camera-inspect the full run because the visible tear is rarely the only damage. Sealing one tear while ignoring a crushed section three feet deeper is a waste of your money.
- Blind terminations pulling crawlspace air. In mill-era renovations, supply runs often stop short in the crawlspace. Homeowners think they’re recirculating conditioned air. They’re not. We find these with cameras, then cap or extend properly before any sealing begins.
- Sealing 1980s subdivision ducts before clearing construction debris. East Roswell attic runs still contain drywall dust, wood scraps, and rodent nesting from the build year. Restricted airflow makes new seals fail under static pressure. We clear first, seal second.
Pricing for Duct Sealing in Roswell, GA
A typical duct sealing job in Roswell runs $400 – $1,200. Spot repair of accessible flex runs in a crawlspace: $400 – $650. Whole-system mechanical sealing of metal trunk-and-branch in an attic: $800 – $1,200. If camera inspection finds blind terminations, crushed flex, or disconnected runs that need extension or replacement, we write a separate price for that work. You approve it before we proceed.
What moves the price: accessibility (crawlspace vs. attic), linear feet of duct, number of disconnected runs found, and whether source removal is needed before sealing. We do not quote per-vent. One flat price per system, written down before we start.
Estimates are free. Call (361) 326-5060 and we’ll give you a real range based on your home’s age, duct type, and what you’re experiencing. If your system is in Roswell’s Historic District and you suspect mill-era renovations, mention that when you call. We’ll bring the camera rig and plan extra time for mapping.
We Also Serve Cities Near Roswell
Our crews work throughout north metro Atlanta, including Duct Sealing in Roswell and surrounding communities: Alpharetta, Woodstock, Marietta, and Holly Springs. Each home gets the same written price, the same camera inspection, and the same 365-Day Done Right Promise.
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 About Duct Sealing in Roswell
Yes, in most cases we can seal mill-era ductwork without full replacement, but only after camera inspection and source removal. We need to verify that supply trunks were actually extended to each room and aren’t terminating blindly in your crawlspace. If we find blind terminations, we’ll cap or extend them, then seal the accessible joints with mastic and mesh. Call (361) 326-5060 and we’ll camera-inspect before we write any price.
Roswell’s humidity and pollen load are the culprits. The Chattahoochee River corridor keeps crawlspaces damp year-round, and heavy spring pollen coats everything that enters through vented returns. Seals applied over dirty, moist surfaces fail prematurely. Seals applied after proper cleaning and preparation last. That’s why we negative-air clean first, every time.
Yes, we follow NADCA assessment and cleaning standards, and it matters significantly for older Roswell homes. NADCA requires inspection before sealing, which is how we find blind terminations and crushed runs that untrained crews miss. On mill-era systems, skipping this step violates the standard and pressurizes your crawlspace. We don’t skip steps.
Signs include persistent musty or earthy smells when the air handler runs, rooms that never reach temperature despite good airflow at the register, and high humidity readings in conditioned spaces. The only way to confirm is a camera inspection. We feed a scope through every supply run and show you the footage. If we find a blind termination, we explain your options and write a price before we fix it.
Yes, but only if we seal the return side and the filter rack, not just the supply ducts. East Roswell’s rigid metal systems often leak at return plenum joints, pulling unfiltered attic air directly into your system. We seal those joints and verify your filter fits tightly in the rack. During Roswell’s March – April pollen peak, that sealed return path is what keeps your indoor counts down. Call (361) 326-5060 for a free estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Roswell since 2004.