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 Snellville
Most Snellville homes were built during Gwinnett County’s 1978-1995 volume-build boom with flexible duct stapled-not clamped-at collar connections. Three decades later, those staples have pulled loose, inner liners have sagged and torn, and conditioned air is dumping into attics and crawlspaces instead of reaching your rooms. In Snellville, duct repair and sealing isn’t an add-on; it’s often the prerequisite that makes cleaning possible at all. Our Duct Repair & Sealing crews serve Snellville from our Atlanta office, and we see the same pattern on ranch homes near Brookwood High School, split-levels off Scenic Highway, and two-story builds throughout the Centerville area. Call (678) 679-7540. We answer live, and we’ll put a written price in your hand before any panel comes off.
Why CleanRun Air Duct Cleaning Alpharetta Is Snellville’s Preferred Duct Repair & Sealing Company
We’ve been documenting the inside of every duct run since 2013. That practice started because Tomas Reyes wanted customers to see what their money bought, not take his word for it. In Snellville, that photo record has become especially consequential. The original flex duct in a 1985 Centerville ranch looks nothing like the metal trunk-and-branch systems we find in newer Lawrenceville subdivisions. When we show a Snellville homeowner the staple holes at a plenum collar and the torn liner dumping air into a 140-degree attic, the repair need is self-evident. No sales pitch required.
Our crews are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. Every job carries a written price agreed before work starts and a 365-Day Done Right Promise backed in writing, not subject to manager approval. If you have a competitor’s written estimate, we provide a Free Second Opinion at no cost. We put our number next to theirs.
Our Duct Repair & Sealing Services in Snellville
Flex Duct Repair
This is the work we do most in Snellville. The builder-grade flex installed during Gwinnett County’s suburban expansion used thin-wall inner liners that sag at mid-span and tear at stress points. On a recent job near Brookwood High School, we pulled registers on a 1988-built ranch and found the original flex duct unstapled from both the plenum collar and two register boots, sagging mid-span with a torn inner liner. After a camera inspection we re-clamped and mastic-sealed the collars, replaced two collapsed flex runs, and only then ran source removal with HEPA filtration. Post-job blower motor amp draw dropped and the homeowner finally felt airflow in the back bedrooms. We replace collapsed or torn flex runs with new insulated flex, properly supported and clamped, not stapled.
Mastic Sealant Application
Mastic is a water-based sealant we brush or trowel onto joints, seams, and collar connections after mechanical fastening. In Snellville’s humid subtropical climate, mastic outlasts foil tape, which degrades in attic heat and humidity. We apply mastic to every repaired collar connection and to accessible metal trunk seams. The goal is a system that holds negative pressure during cleaning and maintains static pressure efficiency year-round. We use professional-grade mastic rated for HVAC applications, not hardware-store caulk.
Air Leak Repair
Air leaks in Snellville homes typically occur at three points: plenum collar separations, register boot disconnections, and compromised flex-to-metal transitions. Each leak dumps conditioned air into unconditioned spaces and pulls attic or crawlspace air into return pathways. We pressure-test after repair to verify seal integrity. In Snellville’s older stock, we often find multiple leaks in a single system; sealing one without addressing the others changes the pressure balance and can worsen leakage at remaining gaps. We map the full system before recommending scope.
Metal Duct Repair
Some Snellville homes, particularly two-story builds from the early 1990s, use galvanized steel trunk lines with flex branch takeoffs. We repair separated trunk seams, replace rusted sections, and seal takeoff connections. Metal repair requires sheet metal screws, draw bands, and mastic; we do not use tape as a primary seal. If your Snellville home has a hybrid metal-and-flex system, we inspect both materials and quote repairs for each.
Duct Insulation Replacement
When flex duct outer insulation becomes water-stained, compressed, or mold-affected, R-value drops and condensation risk rises. In Snellville’s crawlspaces, where groundwater and humidity are persistent, we replace compromised insulation with new fiberglass-wrap flex or add insulation sleeves to metal runs. We photograph the condition before quoting so you see what we found.
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 Snellville
Our equipment roster includes Nikro negative-air machines, Honeywell media air cleaners, and Aprilaire dehumidification components. We stock common flex duct diameters, insulated collars, and mastic in our Snellville-area inventory so repairs proceed without waiting on Atlanta distribution. For homes with Abatement Technologies HEPA filtration add-ons, we verify compatibility before modifying duct configuration. You can look up every brand we name; we don’t use equipment we can’t document.
Common Duct Repair & Sealing Problems We See in Snellville Homes
- Stapled collar connections pulled loose. Gwinnett County volume builders of the 1980s often stapled flex duct to plenum and boot collars instead of using mechanical clamps. Thirty years of thermal cycling and vibration have pulled most of those staples free. We find this on nearly every pre-1995 Snellville home we enter.
- Sagged mid-span flex with torn inner liners. Unsupported flex duct sags between joists or trusses, creating low points where debris collects and inner liners tear from weight stress. The torn liner then acts as a bypass, dumping air into the sag cavity.
- Decades of pollen accumulation re-entraining into airflow. Gwinnett County records extreme spring pollen counts from loblolly pine, oak, and sweetgum. That pollen infiltrates return systems through gaps in building envelope and duct leaks, coating duct interiors. Every air handler cycle re-entrains fine particulate into occupied space.
- Mold colonization on damp flex liners in crawlspaces and attics. Snellville’s humid subtropical climate creates persistent condensation inside ductwork, especially in unconditioned spaces common to 1980s construction. Sealing leaks without addressing moisture traps the problem behind new mastic; we inspect for active growth before sealing.
Pricing for Duct Repair & Sealing in Snellville, GA
A typical flex duct collar repair and re-clamp in Snellville runs $180-$340 per connection, including mastic sealant and support strap installation. Full flex run replacement, common when inner liners are torn or collapsed, ranges $420-$780 per run depending on diameter, length, and attic accessibility. Metal trunk seam sealing runs $280-$520 for accessible sections; rusted section replacement adds material and labor. Duct insulation replacement in crawlspaces starts around $360 per run but varies with moisture damage extent.
What moves the number: attic versus crawlspace access, number of compromised runs, presence of active mold requiring remediation before sealing, and whether the air handler platform needs modification to accommodate proper flex routing. We deliver a written price before any work starts, every time, under Haven Standard Clause 1. No per-vent pricing. No coupon bait. Bring a competitor’s written estimate and we’ll provide a Free Second Opinion at no cost. Call (678) 679-7540.
We Also Serve Cities Near Snellville
Our crews work throughout Gwinnett and surrounding counties, including Duct Repair & Sealing in Snellville and neighboring Lawrenceville, Buford, Norcross, and Suwanee. Scheduling and dispatch are coordinated from our Atlanta office; crews serve each city locally with the same written-price, photo-documented standard.
Serving Snellville, GA - Our Local Coverage Area
We’re based in the Snellville 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 Snellville
No. If the flex duct is disconnected at the plenum or register boots, negative-pressure extraction cannot establish proper airflow, and debris in disconnected sections won’t be removed. We inspect with a camera first and quote necessary repairs before cleaning. In Snellville’s 1978-1995 housing stock, this sequence is standard, not exceptional. Call (678) 679-7540 for a camera inspection and written scope.
It may not need cleaning; it likely needs sealing and debris removal. Construction-phase duct systems collect drywall dust, sawdust, and fastener debris that builders rarely remove. In Snellville’s newer subdivisions near Webb Gin House Road, we’ve found register boots stuffed with insulation scraps and flex ducts crushed by trade traffic before drywall. The builder should have capped ducts during construction and cleaned before certificate of occupancy; most don’t. We inspect with a camera and quote only what’s actually needed.
We document staple holes at collar connections, tears in inner liners, sag points with debris accumulation, disconnected boots, and mold growth on damp liners. In Brookwood-area homes, we routinely find flex that was never clamped at original installation. The camera record becomes part of your job file; you see what we see before approving any work.
Yes. Gwinnett County’s spring pollen counts are among the highest in the Southeast, and loblolly pine, oak, and sweetgum pollen is fine enough to infiltrate through building envelope gaps and return-air leaks. Once inside, it coats duct interiors and re-entrains with every air handler cycle. Sealing return pathways and cleaning accumulated deposits reduces indoor pollen loading measurably.
We seal both. Metal trunk seams, takeoff connections, and air handler cabinet gaps are sealed with mastic and mechanical fasteners. In Snellville homes with hybrid systems, we often find metal trunk leaks compounding flex disconnections; sealing only one leaves the system compromised. We map pressure losses across the full system and quote repairs for all materials found deficient.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Alpharetta, serving Snellville since 2013.