Duct Sealing in Grayson - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Grayson

Last April, a crew from our Grayson route pulled up to a two-story off Grayson Parkway where the homeowner had already paid another company to “clean” the ducts. The vacuum truck left, but the pollen smell never did. We found the attic flex duct original to the 1992 build, sagging in three places, with pinholes along the top run where attic heat had baked the outer jacket brittle. The previous crew never looked. We sealed the leaks with mastic and foil tape, replaced two crushed sections, and the house finally stopped recycling pine pollen back through the returns. That’s the difference between moving air through a system and actually fixing it.

Call (361) 326-5060

Duct sealing in Grayson typically runs $450 – $1,200 for a whole-house seal, depending on whether we’re patching accessible joints or chasing leaks through original flex runs in a 1990s attic. Most jobs finish in a single visit. Call (361) 326-5060 for a written estimate before any work starts.

We’re dispatched from our Atlanta office, but our crews know Grayson’s split personality: the tight 1980s – 90s subdivisions near Grayson Parkway and Rosebud Road, where builder-grade flex duct is hitting its thirtieth summer in a 140-degree attic, and the rural properties out toward Tribble Gap Road with longer metal runs and more opportunities for seams to work loose. Both leak. Both waste money. Both send attic air, pollen, and humidity into your living space. We treat them differently because the construction demands it.

Why Hollis Air Duct Cleaning Is Grayson’s Preferred Duct Sealing Company

Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. In Grayson, that longevity matters because we’ve watched the original subdivisions age through two full HVAC lifecycles. We know which builders used rigid trunk lines with flex drops, which ran flex all the way to the plenum, and where the attic access is tight enough that a technician needs to plan the job before climbing up.

Our technicians are background-checked, uniformed, and held to The Garrison Code: arrive inside the quoted window, price in writing before touching equipment, complete the job by the book, and leave the site clean. No exceptions. The 365-Day Done Right Promise covers every duct sealing job in writing. If a seal fails within a year, we return and make it right at no charge, including a free second visit.

Phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule.

Air Duct Sealing in Grayson

Air Duct Sealing in Grayson means closing the gaps, seams, and pinholes that let conditioned air escape into your attic, crawl space, or wall cavities. In this market, the need is driven by two forces: the original flex duct in 1980s – 90s subdivisions that has degraded from attic heat and rodent activity, and the humid subtropical climate that makes every leak an entry point for moisture and mold spores. A typical whole-house seal in Grayson runs $450 – $1,200, with partial repairs on accessible joints starting around $280.

Attic Flex Duct Inspection

We start every Grayson job with a visual inspection of attic runs, especially in subdivisions like those off Rosebud Road where original builder-grade flex has spent three decades in summer heat. Sagging, kinked, or torn flex doesn’t just leak; it creates turbulence that deposits pollen and debris inside the duct. Sealing without inspecting is like patching a tire without finding the nail.

Mastic and Mechanical Sealing

Our crews use duct sealing mastic, a water-based compound that remains flexible after curing, reinforced with foil tape at joints and plenum connections. For rigid metal trunk lines common in rural Grayson homes, we add mechanical fasteners before sealing to prevent the seam from working open during the next expansion cycle.

Duct Sealing Services in Grayson

Duct Sealing Services in Grayson cover everything from spot repairs on accessible joints to comprehensive sealing of an entire system, including returns and supply branches. Because Grayson sits at the transition between Gwinnett County’s older subdivisions and remaining rural acreage, our crews carry both flex duct replacement stock and rigid metal sealing supplies on every truck. A full-system seal on a 2,500-square-foot home typically falls in the $650 – $980 range, with larger rural homes or systems with extensive flex replacement reaching toward $1,200.

Zone-by-Zone Pressure Testing

We don’t guess where the leaks are. Our Duct Sealing team pressurizes the system and measures airflow loss at each zone, then prioritizes repairs by impact. In Grayson’s 1990s two-stories, we often find the second-floor return path leaking through a chase that was never properly sealed during construction. Fixing that single path can recover 15 – 20 percent of lost capacity.

Post-Seal Verification

Every job ends with a second pressure test and, when accessible, before-and-after photos of the sealed joints. You see what was fixed. We document it for the 365-Day Done Right Promise. No hand-waving, no “trust us.”

Trusted Brands We Service in Grayson

Our trucks carry professional-grade equipment and materials from Nikro, Honeywell, and Abatement Technologies, the same brands commercial crews specify. For Grayson homeowners, that means we don’t order parts; we stock them. Honeywell media filters and Aprilaire filtration upgrades are available same-day if your sealing job reveals the system is pulling unfiltered attic air. Nikro negative-air machines and Abatement Technologies HEPA equipment are on every truck for jobs where opening the ductwork risks disturbing accumulated pollen or mold. We also handle Air Duct Cleaning in Grayson and Dryer Vent Cleaning in Grayson when a full-system approach makes more sense than sealing alone.

Common Duct Sealing Problems We See in Grayson Homes

• Original flex duct degradation in 1990s subdivisions. The homes near Grayson Parkway and Rosebud Road often have flex runs that have spent thirty summers in attics exceeding 140 degrees. The outer jacket cracks, the inner liner tears, and the insulation layer compresses. We replace damaged sections and seal the transitions with mastic rated for the temperature swing.
• Pollen infiltration through return leaks. Grayson’s spring pollen load, driven by the Pine Barrens and surrounding pine-oak forest, is among the highest in the country. Leaky returns in vented attics pull that pollen directly into the system, coating the coil and recirculating through the house. Sealing the return path is often more impactful than cleaning the ducts.
• Humidity-driven mold at supply boots. The long cooling season in Grayson’s humid subtropical climate means cold supply air hitting hot, humid attic air at a leaky boot creates condensation. We seal the boot-to-ceiling penetration and add insulation where missing to break the thermal bridge.
• Rodent damage in rural properties. Homes on larger lots toward Tribble Gap Road often have attic access points we don’t see in tighter subdivisions. Mice and squirrels chew flex duct for nesting material, leaving gaps that leak air and admit droppings. We seal accessible damage and flag entry points for pest control.

Pricing for Duct Sealing in Grayson, GA

We Also Serve Cities Near Grayson

Our crews cover Loganville, Snellville, Buford, and Norcross with the same written pricing and 365-Day Done Right Promise. Dispatch is coordinated from our Atlanta office, but the trucks serving Grayson live in this corridor and know the local housing stock.

FAQs About Duct Sealing in Grayson