Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Fast, Reliable Duct Sealing Across Roswell
Duct sealing in Roswell comes down to one word: leaks. The joints, collars, and boots that connect your ductwork leak, and in Roswell’s humid, pine-heavy air, those leaks pull in pollen, moisture, and insulation dust every time your AC kicks on. We seal them properly with mastic and professional tape, not hardware-store patches. Roy Castellanos leads our crew, and we schedule Roswell jobs fast. Call (762) 769-7145 for a written quote before any work begins.
We know Roswell’s housing stock because we work in it every week. Split-levels off Holcomb Bridge Road, ranches near the river, condos off Alpharetta Highway. Each has its own duct problems, and most of them trace back to the same thing: air moving where it shouldn’t. A homeowner who understands why their ducts leak is a homeowner who can make a smart decision. That’s how we do business.
Why Hollis Air Duct Alpharetta Is Roswell’s Preferred Duct Sealing Company
Roswell homeowners call us because we give them a price in writing before we touch the ducts, and because that price does not move. No “we found more damage once we opened it up” conversations. The Duct Sealing team at Hollis works under The Garrison Standard, which is about as simple a promise as you’ll find in this trade: arrive inside the window, put the price in writing, do the job by the book, leave the site clean.
We’re part of the Garrison Partners family, founded in 2004. Roy Castellanos runs the operation, and he sets the tone: no theatrics, no upsells, just the work done right. Every job carries the 365-Day Done Right Promise. If a seal fails within a year, we return and fix it at no charge. That’s written down on every invoice, not implied.
Our technicians are background-checked and uniformed. You’ll know who’s coming through your door before they arrive. And when you call, a real person answers. Not a call center queue, not a voicemail that might get returned Tuesday. That matters when you’re scheduling a job in Roswell and need a straight answer.
Styles & brands we work with
HVAC Duct Sealing in Roswell
HVAC Duct Sealing in Roswell means closing every gap, joint, and collar where conditioned air escapes or attic air gets pulled in. In a typical Roswell split-level or ranch, that means inspecting crawlspace flex duct, hallway returns, attic boots, and the plenum connections. We seal supply and return lines with mastic, which stays flexible when Roswell’s summer humidity makes metal expand and contract. The goal isn’t just saving money on the utility bill. It’s keeping pine pollen, fiberglass insulation, and humid outdoor air out of the air you breathe.
Sealing Supply vs. Return Ducts
Most Roswell homes lose more air on the supply side than homeowners realize. When conditioned air leaks into a crawlspace or attic, your AC runs longer to hit the thermostat setting. But the return side matters more for air quality. A leaky return pulls unfiltered air from wall cavities, crawlspaces, and attics directly into your living space. We test both sides and seal what needs sealing, on every job.
Standard duct sealing for a Roswell home runs $850 to $1,600 depending on the number of returns, the duct layout, and access. Larger homes with crawlspace and attic ductwork on both sides of the system tend toward the upper end. A smaller ranch with accessible sheet-metal trunk lines might come in near $700. Every quote is written down before work starts.
Duct Repair in Roswell
Duct Repair in Roswell is often the difference between sealing a joint and replacing a section. When flex duct in a crawlspace sags and separates at a taped collar, sealing it won’t help. The duct needs re-supported, re-connected, and sealed correctly. Same with crushed return boots in attic spaces, which we see regularly in 1970s builds off Holcomb Bridge Road and Alpharetta Highway. Repair means restoring function first, then sealing.
Sagging Flex Duct and Disconnected Collars
Roswell homes built in the 1970s through 1990s typically used flex duct run through crawlspaces and attics. Over decades, the plastic outer liner sags between supports, and the inner liner pulls away from the metal collar. That gap pulls humid outdoor air straight into the blower. We re-support the duct, reconnect the collar, seal it with mastic and UL-listed tape, and clean up the debris left behind.
Return Boot Replacement and Rim-Joint Sealing
When a return boot in an attic pulls away from the drywall or the rim joist, it creates a direct path from raw attic air into your home. Pine pollen season in Roswell makes this obvious fast: registers turn yellow-green within weeks. Repairing a return boot means removing the old one, fitting and sealing a new boot, and verifying with negative-pressure testing that no attic air still moves through the joint. Typical duct repair for a Roswell house ranges from $400 to $1,100 depending on access and what’s actually failed. We tell you the number before we start.
Trusted Brands We Service in Roswell
We install and seal ductwork that connects to systems from every major manufacturer, and we keep a rolling stock of the sealing materials Roswell homes need most: collar collars, mastic, UL-listed tape, and return boots. For filtration and air-quality work, we trust Nikro negative-air machines and filtration products from Honeywell and Aprilaire. These are professional-grade tools, not hardware-store gear. If your existing ductwork was installed to work with a specific brand’s airflow spec, we respect that and seal to match.
Common Duct Sealing Problems We See in Roswell Homes
- Yellow-green registers every spring: Roswell’s loblolly pines and oaks release huge pollen loads from March through May. Unsealed return boots in attic spaces pull that pollen directly into the ductwork, and it shows up as fine dust on registers within weeks. Sealing the return path stops it at the source.
- Hallway returns pulling wall-cavity air: 1970s ranches often used wall cavities as return plenums. If the drywall-to-duct connection isn’t sealed, the system pulls air from inside the walls, bypassing your filter completely. This is why some Roswell homes stay dusty even after professional cleaning.
- Crawlspace flex duct separating at collars: Humidity and temperature swings in crawlspaces cause the plastic liner to expand, contract, and eventually pull free from its metal collar. That gap pulls humid outdoor air into your AC, making the blower work harder and raising indoor humidity.
- Split-levels with mixed sheet metal and flex: Roswell’s 1980s split-levels often have sheet-metal trunk lines in the main floor and flex branches in the attic or crawl. The transition points between the two are prime leak locations, especially above garages and in cathedral-ceiling chases.
See the difference
Before
After
Before
After
Before
AfterPricing for Duct Sealing in Roswell, GA
A typical duct sealing job in Roswell runs $850 to $1,600 for a whole system, with smaller repair-only jobs starting around $400. The number depends on how many returns your home has, whether ductwork runs through crawlspace or attic, and how much of the system is accessible. Homes in Martin’s Landing with split-systems and multiple attic boots usually land near $1,200 to $1,500. A single-story ranch with a straight trunk line might come in under $1,000. You’ll know your exact price in writing before we start. Call (762) 769-7145 and we’ll schedule a walkthrough of your Roswell home, no obligation.
We Also Serve Cities Near Roswell
Our crews serve Duct Sealing in Roswell and the surrounding area, including Alpharetta, Duluth, Canton, and Suwanee. If you’re just over the city line, the scheduling process, pricing standard, and 365-Day Done Right Promise are exactly the same. Call and we’ll tell you which day works for your zip code.
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
Because the return boots in Martin’s Landing’s original 1970s and 1980s construction frequently pull away from the drywall and rim joist, and once that gap opens, your ducts pull raw attic air with pine pollen, insulation fibers, and humid summertime air straight through your registers. A basic sealing job at the supply grilles won’t stop it. We inspect every boot, and when the gap is there, we replace and seal the boot to make sure attic air stays in the attic. If you’re in Martin’s Landing and seeing yellow-green dust, this is almost certainly part of your issue. Call (762) 769-7145 and we’ll take a look.
Yes, significantly. Flat ranches and newer Craftsman-style builds often respond to mechanical sealing, but crawlspace flex duct in a 1980s split-level requires inspection first because the ducts are often sagging, disconnected, or kinked. Sealing a separated collar does nothing if the inner liner has pulled free. We re-support, reconnect, seal, and then pressure-test. The method has to match the duct’s condition, not just its location. That’s why we walk every Roswell job before quoting.
Pine pollen itself doesn’t break down mastic or tape, but pollen is a visible marker for air leaks. If unsealed ducts keep pulling pollen in, you’ll see it on registers within two or three weeks in spring. If you see it after sealing, a joint opened up or a return boot failed. Under our 365-Day Done Right Promise, that means we come back and fix it at no charge. Pollen is the canary: it tells you where the air leak is better than any gauge can.
Because shared building systems and restricted access change how the work gets done. A condo near the river or an apartment conversion off Alpharetta Highway might have ductwork running through common chases, stacked returns, or locked mechanical rooms. We coordinate with building management, work within scheduled windows, and handle the job in a single visit when access allows. We also stage equipment carefully because parking and elevator access are often limited. If you’re in a Roswell condo or apartment, mention that when you call so we can plan accordingly.
Yes, often by a wide margin. If your ranch has hallway returns with undersized grilles, wall-cavity return paths, or crawlspace flex that’s separated at the collar, the system is pulling in unfiltered air constantly. You can have the ducts cleaned, and six months later they’re dirty again because the source of the dirt was never addressed. Sealing those leaks first means future cleaning cycles last longer. In Roswell’s housing stock from the 1970s and beyond, sealing is the highest-ROI step for keeping ducts actually clean. Call (762) 769-7145 for a Roswell-specific quote.
Sealing Roswell’s Ductwork the Right Way
Every Roswell house has a different duct story. Some need a full seal, some need a return boot replaced, some need flex duct re-supported in a crawlspace. What they all need is a straight answer about what’s wrong, what it costs, and what happens if it fails. That’s the Garrison Standard, and it’s how Roy Castellanos runs every job. We show up on time, put the price in writing, do the work, and leave the site clean. If it fails within a year, we come back at no charge.
Call (762) 769-7145 today. We’ll schedule a walkthrough in Roswell, give you a written price before any work starts, and explain exactly what your ducts need. No pressure, no moving numbers. Just the work, done right.
Written by Roy Castellanos, Owner at Hollis Air Duct Alpharetta, serving Roswell, GA with The Garrison Standard.