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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Lawrenceville
Duct sealing in Lawrenceville typically costs $800 – $2,400 for a whole-home system, with most jobs completed in a single day. If your home was built in the 1990s or 2000s in subdivisions like Sugarloaf or along the GA-316 corridor, your flex duct is likely reaching the end of its service life. Hollis Air Duct Cleaning dispatches crews from our Atlanta office to Lawrenceville daily, and we know the local housing stock well enough to price the job accurately before we arrive. Call (361) 326-5060 for a free written estimate.
Why Hollis Air Duct Cleaning Is Lawrenceville’s Preferred Duct Sealing Company
We’ve been working in Gwinnett County long enough to recognize the exact failure patterns in Lawrenceville’s subdivision homes. Our Duct Sealing team has handled hundreds of jobs in Sugarloaf, Collins Hill, and the older ranch neighborhoods near historic downtown Lawrenceville. We arrive inside the quoted window, price the job in writing before touching anything, and leave the site clean. Every repair carries our 365-Day Done Right Promise: if the seal fails within a year, we return and make it right at no charge, including a free second visit. Our technicians are background-checked and uniformed, and our phones are answered by a live person 24 hours a day, 7 days a week.
Duct Repair in Lawrenceville
Duct Repair in Lawrenceville most often means addressing flex duct that has degraded in 130°F+ attic conditions common to homes built between 1990 and 2010. The repair involves identifying separated joints, collapsed runs, or sections where the outer jacket has failed, then restoring airtight connections with mechanical fasteners, mastic, and reinforcement mesh. A typical repair job in Lawrenceville runs $400 – $1,200 depending on accessibility and the extent of damage. Most homeowners notice the need when rooms won’t heat or cool evenly, or when utility bills spike without explanation.
Attic Flex Duct Restoration
We see this constantly in Lawrenceville’s two-story frame homes: flex duct sagging between trusses where the support strap has failed, or the inner liner has torn at a sharp bend. Our crews use Rotobrush rotary systems to clear debris first, then rebuild the connection with proper support and sealed joints. The Garrison Standard requires us to photograph the repair and show you the before and after.
Crawlspace Duct Reconnection
Homes on crawlspace foundations near the historic downtown area often suffer disconnected returns where humidity has corroded tape adhesives. We reseat the collar, apply mastic-rated sealant, and verify with a smoke pencil test. No guesswork, no “it should hold” – we prove the seal before we leave.
Air Duct Sealing in Lawrenceville
Air Duct Sealing in Lawrenceville addresses the conditioned air you’re losing to attic, crawlspace, and wall cavities through gaps at plenum connections, register boots, and degraded flex duct jackets. A typical whole-home sealing job runs $800 – $2,400, with partial system sealing starting around $400 for targeted repairs. Lawrenceville homeowners usually call us after noticing uneven temperatures between rooms, excessive dust, or energy bills that climb despite consistent thermostat settings. Sealing is most effective when paired with a camera inspection, since sealing over active mold or pest intrusion traps the problem and guarantees failure.
Mastic and Mesh Application
We apply duct sealing mastic, a thick, fiber-reinforced compound that remains flexible after curing, to all accessible joints and plenum connections. Unlike foil tape, which degrades in Lawrenceville’s attic heat within 3 – 5 years, mastic lasts the life of the system when applied to sound substrate. We only use mastic from Abatement Technologies and Guardsman – products rated for commercial applications that hold up in residential attics.
Aeroseal Alternative for Inaccessible Runs
For duct buried behind finished walls or between floors, we may recommend aerosolized sealant injection. This pressurizes the system and seals leaks from the inside. It’s not always the right choice for Lawrenceville’s older flex duct, where the leak is structural jacket failure rather than a simple gap. We’ll tell you straight if your duct is too far gone for this approach.
Trusted Brands We Service in Lawrenceville
Hollis stocks sealing compounds and reinforcement materials from Abatement Technologies and Guardsman, plus filtration upgrades from Aprilaire for homeowners who want cleaner air after the seal is complete. We keep common flex duct diameters and connector collars on our Lawrenceville-area vans, so most repairs don’t wait on parts. If your system needs a filtration upgrade alongside sealing, we carry Honeywell and Aprilaire media cabinets that drop into existing return plenums without major modification. Everything is priced in writing before work starts.
Common Duct Sealing Problems We See in Lawrenceville Homes
- Disintegrating vapor barrier from attic heat. Lawrenceville’s summer attic temperatures regularly exceed 130°F, which destroys the plastic outer jacket on flex duct installed in the 1990s and 2000s. Once the jacket flakes off, no tape or mastic will adhere, and sealing must address the substrate failure first.
- Condensation-driven mold in unconditioned spaces. High humidity in Lawrenceville’s crawlspaces and attics causes moisture accumulation inside flex duct, especially where the vapor barrier has cracked. Sealing over active mold traps spores in the airstream and guarantees the seal will fail within one cooling season.
- Pest intrusion in older subdivisions. We find rodent and insect nesting in flex duct runs near the Sugarloaf and Collins Hill areas, where mature trees provide access to rooflines. Sealing without source removal entombs the contamination and creates odor problems.
- Drywall dust and construction debris in newer homes. Even homes built in the 2010s often have ducts full of construction residue that the builder never cleaned. Sealing these ducts locks debris against the register grilles and accelerates filter loading.
Pricing for Duct Sealing in Lawrenceville, GA
Whole-home duct sealing in Lawrenceville typically runs $800 – $2,400. Partial system sealing, targeting the air handler plenum and major trunk connections, usually falls between $400 – $900. Several factors move the price: attic accessibility (crawl-in versus walk-in), the extent of flex duct degradation, whether source removal is needed before sealing, and if any sections require replacement rather than repair. We do not quote per-vent prices or bait-and-switch teaser rates. The price we write down before work starts is the price you pay. Every estimate is free, and we bring a camera so you see what we see. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Lawrenceville
Hollis crews work throughout Gwinnett County and beyond. If you’re in Buford, Norcross, Lilburn, or Duluth, the same pricing structure and 365-Day Done Right Promise apply. Our Lawrenceville dispatch coordinates scheduling for the full metro area, and we route technicians to minimize drive time to your location.
Serving Lawrenceville, GA - Our Local Coverage Area
We’re based in the Lawrenceville 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 Lawrenceville
Flex duct installed during Lawrenceville’s 1990s – 2000s building boom was rated for 15 – 20 years in moderate conditions, but Gwinnett County’s 130°F+ attics and heavy pollen loads accelerate degradation. The plastic vapor barrier becomes brittle and fails prematurely. Call (361) 326-5060 for a camera inspection and exact quote – estimates are free.
It fixes the conditioned air you’re losing to attic and crawlspace cavities through separated joints, degraded jacket seams, and failed tape at plenum connections. In Lawrenceville’s flex-duct homes, sealing is often temporary if the vapor barrier is actively flaking – we assess this during inspection and tell you honestly whether repair, sealing, or replacement is the right path. Call (361) 326-5060 to schedule.
Sealing is enough when the flex duct jacket is intact and leaks are limited to joints and connections. It’s not enough when the vapor barrier is disintegrating across long attic runs, which we see in most 20-year-old Lawrenceville homes. We show you the camera footage and price both options in writing before you decide. Call (361) 326-5060 for an inspection.
It means the outer vapor barrier has thermally degraded from sustained attic heat exposure, and the inner insulation layer is now exposed to moisture and mechanical damage. This is nearly universal in Lawrenceville’s 1990s – 2000s subdivisions. Sealing tape and mastic won’t bond to the flaking surface, so the duct must be replaced or the damaged section cut back to sound material before sealing. Call (361) 326-5060 for a free assessment.
Gwinnett County’s heavy spring tree pollen and summer grass pollen load accumulates in leaky return ductwork, then distributes through the home when the system runs. Sealing the returns first prevents this infiltration, but if your ducts are already packed with pollen and debris, source removal should precede sealing or you’ll seal the contamination inside. We handle both steps. Call (361) 326-5060 for a written estimate.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Lawrenceville and Gwinnett County since 2004.