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 Repair & Sealing Across Lawrenceville
Duct repair and sealing in Lawrenceville, GA typically costs $280-$750 for most residential jobs, with flex-duct reconnection or mastic sealing of a single supply run starting around $180 and full-system sealing with insulation replacement running toward the upper end. We dispatch to Lawrenceville from our Atlanta coordination office, and most Lawrenceville appointments are scheduled within 2-4 business days. Call (678) 693-5322 for a written estimate before any work starts.
We’ve been working in Lawrenceville since 2013, and the pattern is unmistakable: neighborhoods off Old Peachtree Road, along the Collins Hill corridor, and throughout the Riverdale and Five Forks areas are filled with homes built during Gwinnett County’s explosive 1990s growth - most with original flex-duct systems now past their functional lifespan. Our Duct Repair & Sealing crews know these attic layouts. We’ve documented the same failures across dozens of Lawrenceville homes, and we know what to look for before pulling back the first section of insulation.
Why CleanRun Air Duct Cleaning Cumming Is Lawrenceville’s Preferred Duct Repair & Sealing Company
Lawrenceville homeowners have left us documented reviews describing what they found when we showed them the photo record - separated boots dumping air into attics, degraded liner shedding into blower motors, return leaks pulling yellow pine pollen straight past the filter. We don’t ask for trust. We deliver a written price, a photo record, and the 365-Day Done Right Promise backed in writing on every job.
Our technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. Tomas Reyes, who leads CleanRun, established the company’s documentation standard in 2013: every duct run photographed before and after, every customer sees what we saw. For Lawrenceville homeowners researching before they call, that record is verifiable evidence.
We answer calls live, 24/7. Scheduling is coordinated from our Atlanta office, with Lawrenceville routes planned to minimize drive time and keep appointments predictable.
Our Duct Repair & Sealing Services in Lawrenceville
Flex Duct Repair
This is the work we do most often in Lawrenceville. The dominant local housing stock - 2-story Colonials and Craftsmans in subdivisions built 1988-2005 - was fitted with flexible duct runs routed through unconditioned attics. After 20-35 years of thermal cycling in attics that hit 130-140°F each July, the inner plastic liner degrades, joints loosen, and supply runs separate at the boot or wye connection. We reseat separated runs, replace degraded sections with new flex duct, and seal every joint with mastic. A typical flex-duct repair on a single supply run in Lawrenceville runs $180-$340.
Mastic Sealant Application
Mastic is a water-based sealant we brush or trowel onto duct joints, collars, and plenum connections. It remains flexible after curing, which matters in Lawrenceville’s climate - rigid sealants crack under thermal expansion. We apply mastic to every accessible joint in the system, including return plenums where leakage pulls unfiltered attic air into the airflow. A full-system mastic sealing for a typical 2,500-square-foot Lawrenceville home runs $450-$650.
Duct Insulation Replacement
Original insulation on flex duct in Lawrenceville attics has often compressed, torn, or absorbed moisture over decades. Compromised insulation means conditioned air loses temperature before reaching the register, and in humid summer conditions, cold spots on uninsulated duct create condensation that feeds mold at the register interface. We replace damaged insulation with new R-6 or R-8 flex duct wrap, sealed and taped. Insulation replacement on a partial system in Lawrenceville typically runs $320-$580.
Metal Duct Repair
Some Lawrenceville homes, particularly earlier builds near the downtown historic district and certain custom homes off Sugarloaf Parkway, have galvanized metal ductwork. We repair separated seams, replace rusted sections, and seal with mastic or foil tape rated for metal joints. Metal duct repair in Lawrenceville starts around $220 for accessible seam sealing and runs higher if section replacement is needed.
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.
BeforeAfterTrusted Brands We Service in Lawrenceville
Our equipment roster includes Rotobrush for mechanical agitation in duct runs, Nikro for negative-pressure extraction systems, and Abatement Technologies for HEPA-filtered containment. We don’t hide what we use. These are trade-recognized brands any Lawrenceville homeowner can look up independently, and we name them because Haven Standard Clause 1 requires transparency in what you’re paying for. Parts for common Lawrenceville systems - including flex duct, collars, boots, and mastic from Guardsman - are stocked for fast turnaround without waiting on supply-house orders.
Common Duct Repair & Sealing Problems We See in Lawrenceville Homes
- Separated supply runs in 1990s subdivisions. In the late-90s buildout along SR-316 and Old Peachtree Road, flex-duct supply runs have fully separated at the boot or wye after years of thermal expansion. The system conditions the attic void instead of the bedroom. We find this during cleaning inspections when we pull back insulation.
- Degraded inner liner shedding into the airstream. The plastic inner liner of original 1988-2005 flex duct breaks down in Lawrenceville’s hot attics, shedding particulate that loads the air handler and blower motor. The photo record shows this as a fine debris coating on the blower wheel.
- Return-side leakage pulling unfiltered pollen and attic particulate. Lawrenceville’s dense loblolly pine and oak canopy generates extreme spring pollen counts. Loose return joints pull that pollen - plus attic dust and insulation fragments - straight into the system, bypassing the filter entirely.
- Condensation and mold at register interfaces. Summer attic temperatures exceeding 130°F create warm, humid conditions at the duct-register boundary. Where insulation has failed or seals have degraded, cold supply air meets humid attic air, producing condensation that supports mold colonization visible on the register boot.
Pricing for Duct Repair & Sealing in Lawrenceville, GA
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts. Here is what duct repair and sealing costs in Lawrenceville’s market:
| Service | Typical Range in Lawrenceville |
|---|---|
| Single flex-duct reconnection / boot reseating | $180-$340 |
| Partial flex-duct replacement (2-3 runs) | $320-$580 |
| Full-system mastic sealing | $450-$650 |
| Insulation replacement, partial system | $320-$580 |
| Full-system flex-duct replacement with sealing | $1,800-$3,200 |
These are whole-system prices, not per-vent teaser rates. The final written quote depends on system accessibility, attic conditions, and whether we find additional separation points during inspection. Every Lawrenceville estimate is free, delivered in writing, and valid for 30 days. Bring a competitor’s written quote and we’ll provide a Free Second Opinion, our number next to theirs.
We Also Serve Cities Near Lawrenceville
Our crews work throughout Gwinnett and neighboring counties, including Buford, Norcross, Duluth, and Suwanee. Each of these markets shares Lawrenceville’s 1990s buildout pattern to varying degrees, though Lawrenceville’s concentration of same-vintage flex-duct homes remains uniquely dense.
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
Most need both. The 1988-2005 flex-duct systems common in Lawrenceville subdivisions have typically reached failure age - separated boots, degraded liner, and return leaks are standard findings, not exceptions. Cleaning alone won’t reconnect a supply run that’s dumping air into the attic. We photograph everything during inspection and show you the written scope before any repair work starts. Call (678) 693-5322 for an exact quote - estimates are free.
The most common cause is a separated flex-duct supply run in the attic. On a late-90s two-story Colonial off Old Peachtree Road, our tech pulled back the attic insulation during a routine cleaning and found a 14-inch flex supply run fully separated at the wye, dumping conditioned air straight into a 140°F attic void - the homeowner had been chasing a “hot bonus room” for three summers. We reseated the run, mastic-sealed the collar and boot, and re-insulated the joint; the room finally held temperature. If one room in your Lawrenceville home consistently underperforms, we inspect the duct path first. Call (678) 693-5322 for an exact quote - estimates are free.
We use mastic sealant, not tape alone, on every joint, collar, and boot connection. Mastic remains flexible after curing, which matters in Lawrenceville’s 130-140°F summer attics where rigid sealants crack. We brush mastic onto the joint, embed fiberglass mesh for structural reinforcement on larger gaps, and apply a second coat. Every sealed joint is photographed before insulation is replaced. The process takes 3-5 hours for a typical 2,500-square-foot home. Call (678) 693-5322 for an exact quote - estimates are free.
Yes, through return-side leakage. Lawrenceville’s loblolly pine and oak canopy produces some of the Southeast’s highest spring pollen counts. When return ducts have loose joints or degraded seals, the negative pressure pulls unfiltered attic air - loaded with pollen, dust, and insulation fragments - straight into the airflow, bypassing the register filter entirely. We document this with before-and-after photos of return plenum seals. Sealing the return side is often the most impactful air-quality improvement we make in Lawrenceville homes. Call (678) 693-5322 for an exact quote - estimates are free.
We arrive at the scheduled time, identify the technician by name, and inspect the accessible duct system with a camera. We photograph every run, show you what we found, and deliver a written price before any work begins. If you approve, we repair or replace degraded duct, apply mastic to all joints, replace damaged insulation, and photograph every run again. You receive the complete photo record as a standard deliverable, plus the 365-Day Done Right Promise in writing. No work happens without a written price. Call (678) 693-5322 for an exact quote - estimates are free.
Schedule Your Lawrenceville Duct Repair & Sealing Inspection
Lawrenceville’s 1990s housing wave means entire neighborhoods are hitting the same duct failure window simultaneously. If your home was built between 1988 and 2005 and you’ve noticed uneven temperatures, rising energy bills, or visible debris at registers, the problem is likely in the attic ductwork - and it’s probably not unique to your house. We’ll show you exactly what we find, give you a written price before any work starts, and back the repair with our 365-Day Done Right Promise. Call (678) 693-5322 to schedule your free Lawrenceville estimate.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Lawrenceville since 2013.