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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AfterFast, Reliable Duct Sealing Across Lilburn
Duct sealing in Lilburn typically runs $450 – $1,200 for a whole-home seal on a standard ranch or split-level, and most jobs are scheduled within a few business days. If you’re seeing black dust from your registers weeks after spring pollen season, the problem usually isn’t dirty ducts. It’s disconnected joints in your attic ductwork pulling insulation fibers and pine pollen straight past your filter.
We’ve been working in Lilburn’s 1965 – 1995 subdivisions long enough to know the pattern. Homes off Killian Hill Road, along Five Forks-Trickum, and throughout the Camp Creek corridor share the same construction era: galvanized steel supply trunks, early flex duct runs, and returns that were sized for 1970s HVAC loads. Decades of Gwinnett County’s red clay dust and heavy spring pollen have worked their way through every leaky seam. Our crews dispatch from the Atlanta office and carry the equipment to find and fix these problems properly, not just seal what you can see from the register.
Call (361) 326-5060 for a free estimate. We’ll put the price in writing before any work starts.
Why Hollis Air Duct Cleaning Is Lilburn’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning, founded in 2004 as part of the Garrison Partners family, brings a discipline to Duct Sealing that Lilburn homeowners recognize after they’ve dealt with no-shows and price jumps elsewhere. Our technicians arrive inside the quoted window, in uniform, background-checked, and with the job already priced on paper. That’s The Garrison Standard, and it’s how every Hollis location operates, including the crews serving Lilburn.
Our 365-Day Done Right Promise covers every seal in writing. If a joint we sealed fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.
Phones are answered by a live person 24 hours a day, 7 days a week. You’ll talk to someone who can schedule your appointment, not a callback queue that dumps you to voicemail.
We know the local housing stock. A 1976 split-level off Five Forks-Trickum has different duct problems than a 1985 ranch near Camp Creek, and we inspect accordingly with camera-equipped tools before we quote.
Duct Insulation in Lilburn
Duct Insulation in Lilburn addresses the sweating, energy-wasting supply trunks and flex runs that snake through hot attics during our humid subtropical summers. When your galvanized steel trunk or early flex duct loses its original fiberglass wrap, the temperature differential between 55-degree conditioned air and 140-degree attic air creates condensation. That moisture degrades mastic seals, soaks adjacent insulation, and creates the mold risk that Lilburn homeowners smell before they see it. A typical Duct Insulation job in Lilburn runs $600 – $1,400 depending on linear footage and attic accessibility.
When Insulation Beats Sealing Alone
Some Lilburn ranches have intact joints but bare metal trunks that sweat through every July afternoon. In these cases, wrapping with formaldehyde-free fiberglass insulation and a vapor-barrier jacket stops condensation before it can reopen sealed joints. We see this often in homes near Stone Mountain’s ridgeline, where afternoon attic temperatures peak higher than flatter terrain.
Material Selection for Local Conditions
We specify insulation rated for Gwinnett County’s humidity and temperature swings, not the lightweight hardware-store wrap that collapses after one season. Our crews use professional-grade materials from Honeywell and Abatement Technologies, selected for the specific R-value and vapor-sealing performance your attic demands.
HVAC Duct Sealing in Lilburn
HVAC Duct Sealing in Lilburn is the repair that stops your conditioned air from bleeding into the attic and your attic’s contaminants from being pulled into your living space. The process starts with a camera inspection of the full duct network, followed by mechanical cleaning under negative pressure using Nikro HEPA-filtered equipment, then sealing of all accessible joints with mastic or specialized aerosol sealant depending on duct material and location. A whole-home HVAC Duct Sealing in Lilburn typically costs $450 – $1,200, with simpler register-boot sealing at the lower end and full attic trunk rebuilds at the upper.
Camera Inspection Before Any Seal
We don’t guess. Our Rotobrush camera systems show every disconnected joint, crushed flex run, and degraded duct board seam before we quote. This matters in Lilburn’s older homes, where three disconnected joints above a garage ceiling can waste 30% of your airflow while dumping insulation fibers into every room.
Aerosol Sealing for Inaccessible Networks
Some Lilburn split-levels have duct chases behind finished basement ceilings that can’t be opened without major drywall work. For these, we offer aerosol duct sealing, which pressurizes the system and seals leaks from the inside with a non-toxic polymer mist. It’s the same method used in commercial buildings, and it’s particularly effective on the original galvanized networks where manual access is impossible.
Trusted Brands We Service in Lilburn
Our Lilburn crews carry professional-grade equipment and materials from Nikro, Honeywell, Aprilaire, and Abatement Technologies. Nikro negative-air machines and HEPA filtration systems handle the heavy pollen and insulation fiber loads we find in local attics. Honeywell and Aprilaire filtration products replace the undersized 1-inch filters common in 1970s Lilburn ranches with properly matched media that actually loads at the designed interval. We stock common fittings and sealants locally, so when your 1982 split-level needs a custom transition piece for its galvanized trunk, we’re not ordering parts and making you wait. The right material on the van means the job finishes on schedule, priced exactly as written.
Common Duct Sealing Problems We See in Lilburn Homes
- Disconnected galvanized trunk joints above garages and attics. The 1960s-70s supply trunks in Lilburn’s ranches were jointed with snap-lock seams and minimal sealant. Decades of thermal cycling open these seams, and the negative pressure in your return pulls attic insulation fibers straight into the airstream. Camera inspection finds them; mastic and mechanical reinforcement fixes them.
- Crushed flex duct at attic transitions. Early flex duct in Lilburn homes was often strung tight across joists or compressed against framing. The inner liner collapses, creating a blockage and a leak simultaneously. We see this repeatedly in split-levels where the flex run to the rear bedroom crosses the garage ceiling. Sometimes the duct can be re-routed and sealed; sometimes it’s too degraded and needs replacement.
- Failed seals on degraded fiberglass duct board. Contractors who slap mastic onto duct board with peeling facing are wasting your money. One Gwinnett County summer of humidity and the seal releases. We prep the surface properly or recommend board replacement when the substrate is too far gone.
- Leaky return plenums pulling unfiltered attic air. The return side operates under suction, so every gap is an intake. In Lilburn’s pollen-heavy springs, these gaps load your system with pine and oak pollen that bypasses the filter entirely. Sealing the return plenum and all junctions is often the single most effective improvement for indoor air quality.
Pricing for Duct Sealing in Lilburn, GA
Whole-home duct sealing in Lilburn runs $450 – $1,200 for most single-family ranches and split-levels. Register-boot sealing alone, where the duct meets the wall or floor, typically falls at $150 – $350. Full attic trunk sealing with mastic and reinforcement runs $800 – $1,400. Duct insulation wrapping adds $600 – $1,400 depending on linear footage.
What moves the price: attic accessibility (crawl vs. walkable), duct material (galvanized steel, flex, or duct board), extent of disconnection or damage found during camera inspection, and whether aerosol sealing is needed for inaccessible sections. Every price is written down before work begins. No per-vent pricing, no add-ons at the door, no bait-and-switch. We show you the camera footage, explain what we found, and you approve the written price before we pick up a tool.
Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Lilburn
Our crews regularly work in Snellville, Lawrenceville, Grayson, and Buford, handling the same era of housing stock with the same discipline: written price, camera inspection, and the 365-Day Done Right Promise. If you’re just outside Lilburn city limits, we can likely schedule you on the same routing.
Serving Lilburn, GA - Our Local Coverage Area
We’re based in the Lilburn 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 Lilburn
It’s almost always pine pollen mixed with attic insulation fibers, pulled through leaky return joints and gaps in your ductwork. Your filter never sees these particles because they enter downstream of the filter location. Sealing the disconnected joints and return plenum gaps stops the bypass. Call (361) 326-5060 for a camera inspection and written estimate.
Most 1972 galvanized trunks can be sealed if the metal is structurally sound and the joints are accessible. We camera-inspect first. If the trunk is rusted through or the snap-lock seams have separated beyond repair, we’ll tell you and quote replacement. We’ve sealed dozens of original trunks in Lilburn’s Camp Creek and Killian Hill Road areas successfully.
We clean first, always. Sealing over decades of pollen, dust, and insulation fiber buildup traps contaminants against your fresh mastic and reduces seal adhesion. Our process uses Nikro negative-air HEPA extraction with mechanical agitation to source-remove debris, then we seal on clean surfaces. The cleaning is priced separately or bundled; either way, both steps are written on the estimate before we start.
Yes, by reducing condensation. When your cool supply air leaks into a 130-degree attic through unsealed joints, the temperature differential creates moisture at the leak point. Sealed joints maintain air temperature through the full duct run. For homes with existing moisture damage, we also inspect insulation condition and recommend replacement where the vapor barrier has failed. Call (361) 326-5060 to discuss your specific attic conditions.
We start with a full camera inspection of the supply and return networks, paying special attention to the transition where flex runs cross the garage ceiling and the plenum connections at the air handler. After negative-air cleaning, we seal accessible joints with mastic rated for your duct material, reinforce with mesh where needed, and pressure-test the system to verify leakage reduction. For inaccessible sections, we discuss aerosol sealing. The whole job typically takes one day for a standard split-level. You’ll get before-and-after photos of your own ducts, and the 365-Day Done Right Promise in writing.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Lilburn since 2004.