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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Before
AfterFast, Reliable Duct Repair & Sealing Across Lawrenceville
Duct repair and sealing in Lawrenceville typically costs $280-$850 for most residential jobs, with flex duct re-strapping and mastic sealing falling in the lower half of that range and full duct replacement reaching the upper end. Most Lawrenceville homeowners with 1990s-2000s builder-grade homes need repair work that goes well beyond cleaning - original flex duct routed through 140°F attics has usually sagged, separated, or torn by its twentieth year. Our crews are dispatched from our Atlanta office and serve Lawrenceville directly; call (678) 679-7540 for a written estimate before any work starts.
We know the subdivisions off Sugarloaf Parkway and the US-29 corridor. The housing stock here is specific, and the duct failure patterns are too.
Why CleanRun Air Duct Cleaning Alpharetta Is Lawrenceville’s Preferred Duct Repair & Sealing Company
We’ve been in Lawrenceville homes since 2013, and the pattern hasn’t changed: a homeowner buys a 1998-2005 two-story brick-front in a Gwinnett County subdivision, notices the second floor never cools evenly, smells musty air from the registers, and calls us after a cleaning company quotes a vacuum-only service that won’t address the actual problem. Our Duct Repair & Sealing team arrives with a camera, documents what we find in every run, and delivers a written price before touching a single panel.
Our Lawrenceville customers receive the same deliverables as every other home we serve: a Documented Photo Record of every duct run before and after work, the 365-Day Done Right Promise backed in writing, and technicians operating under Haven Standard Clause 3: Verified Crews. Tomas Reyes established CleanRun in 2013 on the principle that a homeowner should see evidence before paying for ductwork - not hear a sales pitch. We’ve served over 52,000 homes on that basis.
Scheduling is coordinated from our Atlanta office, and crews carry Honeywell airflow meters, Aprilaire filtration components, and Abatement Technologies negative-pressure equipment on every Lawrenceville truck. No “call for a quote.” No per-vent bait-and-switch. One flat price per system, agreed in writing, before work begins.
Our Duct Repair & Sealing Services in Lawrenceville
Flex Duct Repair
Lawrenceville’s dominant housing stock - the 1988-2008 subdivision boom - was built with long flex-duct trunk-and-branch systems strapped every 4-6 feet through unconditioned attics. That spacing was never adequate for Georgia’s thermal load. In the subdivisions near Sugarloaf Parkway, we regularly find flex duct that has sagged into low-point traps, torn at stress points, or pulled completely free of the plenum. Our flex duct repair includes source removal of accumulated debris under negative-pressure extraction, re-strapping at proper intervals with load-rated supports, and camera verification of airflow at every register. We replace damaged sections with new R-8 insulated flex duct where repair won’t restore integrity.
Duct Sealing
Original builder-grade joints in Lawrenceville homes were rarely mastic-sealed. They were taped, if that, with adhesive that degrades in attic heat. Conditioned air leaks into the lint pathway and the unconditioned attic space, raising energy bills and pulling hot, humid attic air into the return side. Our duct sealing service applies mastic sealant - a fiber-reinforced, water-based compound that remains flexible at temperature extremes - to every joint, seam, and penetration. We pressure-test the system before and after to quantify the improvement. In Lawrenceville’s 140°F summer attics, mastic outperforms tape by a factor of years.
Metal Duct Repair
While flex duct dominates Lawrenceville’s residential stock, some custom homes and commercial spaces in the area use galvanized metal trunk lines. We repair separated seams, corroded sections, and failed dampers. Metal work requires different tooling - sheet-metal screws, drive cleats, and specialized sealants - and our crews carry Rotobrush and Nikro equipment configured for both duct types. Where metal duct has been modified by prior HVAC contractors with unsealed penetrations, we restore the original integrity and document the repair with before-and-after photography.
Duct Insulation
Lawrenceville attics destroy duct insulation. The original R-6 or R-8 wrap on flex duct compresses, tears, or simply bakes off over fifteen to twenty years. Bare flex duct in a 140°F attic loses conditioned air through conduction before it reaches the register. Our duct insulation service replaces damaged wrap with fresh R-8 insulation, sealed at all seams, or installs closed-cell foam insulation on metal trunk lines where appropriate. We photograph the insulation condition at entry and exit so the homeowner sees the thermal barrier that was actually installed.
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.
Before
AfterTrusted Brands We Service in Lawrenceville
Our trucks stock Honeywell zone control components, Aprilaire media air cleaners, and Abatement Technologies HEPA filtration equipment - brands homeowners can research independently before we arrive. We don’t ask anyone to trust a proprietary system they can’t verify. For Lawrenceville’s older builder-grade homes with original equipment, we carry Guardsman corrosion inhibitors and compatible sealants. Parts availability means most Lawrenceville repairs are completed in a single visit, with no return trip for a fitting we didn’t stock.
Common Duct Repair & Sealing Problems We See in Lawrenceville Homes
- Under-strapped flex duct sagging into debris traps. In the 1990s subdivisions off Sugarloaf Parkway and the US-29 corridor, original installation used strapping every 4-6 feet. That’s insufficient for the weight of a 25-foot flex duct run. The sag creates a low point where Georgia red-clay particulate, pollen, and construction dust accumulate for years. Standard filters never reach this material because it’s past the filter location in the return plenum.
- Drywall dust and construction debris from original build. Lawrenceville’s rapid 1990s-2000s construction meant homes were often occupied before final duct cleaning occurred. Drywall dust, wood particulate, and insulation fragments remain in the supply and return ducts, clogging the air handler and blower motor within the first three to five years of occupancy. We remove this material with source removal under negative pressure, not surface vacuuming.
- Heat-degraded flex-duct joints separating at the plenum. Original joints were rarely mastic-sealed. After fifteen to twenty summers in 140°F+ attics, the adhesive fails, the inner liner tears, and conditioned air leaks into unconditioned space. The homeowner sees higher energy bills and uneven room temperatures. We re-seal with mastic and verify with pressure testing.
- Mold colonization from humidity intrusion. Lawrenceville’s spring pollen season - the Atlanta metro consistently ranks among the worst nationally for airborne pollen - combines with high summer humidity to create ideal conditions for mold inside compromised duct systems. Separated joints pull attic air into the return; leaks in the supply push conditioned air out, creating negative pressure that draws more humid air in. Repair and sealing breaks this cycle.
Pricing for Duct Repair & Sealing in Lawrenceville, GA
Most Lawrenceville duct repair and sealing jobs fall between $280 and $850, with the majority of flex duct re-strapping and mastic-sealing projects landing in the $340-$580 range. Full flex duct replacement for a complete system typically runs $1,800-$3,400 depending on home size and attic accessibility.
| Service | Typical Range in Lawrenceville |
|---|---|
| Mastic sealing of accessible joints (per system) | $280-$450 |
| Flex duct re-strapping and debris removal | $340-$580 |
| Sectional flex duct replacement (per run) | $180-$340 |
| Full system flex duct replacement | $1,800-$3,400 |
| Duct insulation replacement (per system) | $620-$1,100 |
What moves a job toward the higher end: multiple attic access points, extensive debris requiring source removal, or metal duct modifications by prior contractors that need correction. What keeps it lower: accessible attic space, localized repair needs, and intact insulation that doesn’t require replacement. We deliver one written price before work starts, every time, under Haven Standard Clause 1. No per-vent pricing. No coupon that triples once the truck arrives. Call (678) 679-7540 for a free estimate - we’ll put our number next to any competitor’s written quote under our Free Second Opinion policy.
We Also Serve Cities Near Lawrenceville
Our crews work throughout Gwinnett and surrounding counties, including Duct Repair & Sealing in Lawrenceville proper as well as Buford, Norcross, Duluth, and Suwanee. Each city gets the same documented photo record, written upfront pricing, and 365-Day Done Right Promise. Dispatch and scheduling are coordinated from our Atlanta office.
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 - Duct Repair & Sealing in Lawrenceville
A 2004 Lawrenceville home almost certainly has original builder-grade flex duct that was under-strapped and never mastic-sealed. By now, that duct has sagged, separated at joints, or torn in the attic heat. Cleaning alone won’t restore structural integrity or seal leaks that are wasting conditioned air. We photograph the condition inside every run and show you exactly where repair is needed before quoting a written price. Call (678) 679-7540 for a camera inspection and exact quote.
Lawrenceville’s combination of 140°F+ unconditioned attics and the original 4-6 foot strapping spacing used during Gwinnett County’s building boom creates accelerated sagging and material fatigue. Cities with older metal ductwork or newer construction with better insulation and strapping standards don’t see this failure pattern at the same rate. The flex duct in your Sugarloaf Parkway-area attic is working harder than its design intended. Call (678) 679-7540 for an assessment of your specific system’s condition.
Drywall dust, wood particulate, and insulation fragments left from original construction circulate through the air handler and into living spaces, contributing to respiratory irritation and accelerated equipment wear. In Lawrenceville’s pollen-heavy environment, this baseline debris combines with seasonal allergens to overload standard filtration. Source removal under negative pressure eliminates the material; mastic sealing prevents new infiltration. The improvement is measurable in both air quality and energy consumption. Call (678) 679-7540 for a written estimate.
Most localized tears in flex duct can be repaired with a section replacement using new R-8 insulated flex duct, proper strapping, and mastic-sealed joints. We camera-inspect the entire run first; if the tear indicates systemic degradation throughout the system, we’ll show you the evidence and quote both repair and replacement options with written prices for each. No pressure for the larger job if repair will solve it. Call (678) 679-7540 to schedule an inspection.
Sealed ducts stop pulling hot, humid, pollen-laden attic air into the return side and stop pushing conditioned air into unconditioned spaces. In Lawrenceville, where spring pollen counts are among the nation’s highest and summer humidity sustains mold growth, this containment is the difference between filtered, conditioned air circulating through your home and unfiltered attic air bypassing your Aprilaire or Honeywell filtration system. We pressure-test before and after to prove the seal. Call (678) 679-7540 for a free estimate with documented results.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Lawrenceville since 2013.