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 Johns Creek
Duct repair and sealing in Johns Creek typically costs $280-$650 for most homes, with multi-zone systems running $450-$950 depending on linear footage and access. Our crews serve Johns Creek from our Atlanta office, and we schedule most repair visits within 2-4 business days. Call (678) 693-5322 for a written estimate before any work starts.
We know Johns Creek’s housing stock well. The master-planned subdivisions built here between 1990 and 2008 - Medlock Bridge, St. Ives, Shakerag, Abbotts Bridge - aren’t like older Atlanta suburbs. These are large homes, often 3,500-6,000 square feet, with two or three separate air handlers zoning the house. That means triple the flex-duct connections, triple the junction points where mastic dries out and leaks begin, and triple the opportunity for a technician to miss something. Our Duct Repair & Sealing team documents every run with before-and-after photos, because in a three-zone Johns Creek home, “checking the ducts” means something very different than it does elsewhere.
Why CleanRun Air Duct Cleaning Cumming Is Johns Creek’s Preferred Duct Repair & Sealing Company
We’ve worked in Johns Creek since 2013, and the pattern is consistent: homes here have more ductwork per square foot than comparably priced properties in Cumming or Buford, and that ductwork is reaching the end of its designed lifespan. Tomas Reyes built CleanRun on the H.A.V.E.N. Standard - Haven Standard Clause 1 requires a written price before any panel comes off, and Haven Standard Clause 3 requires verified, background-checked crews identified by name before arrival. Johns Creek homeowners expect documentation, not promises. Every job includes a Documented Photo Record of every duct run, delivered as part of the standard job record.
Our 365-Day Done Right Promise is backed in writing, not subject to manager approval. If a seal fails or a repair doesn’t hold, we make it right. We also offer a Free Second Opinion on any written estimate from a competitor - bring us the quote, and we’ll put our number next to it in writing.
Calls are answered by a live person, 24/7, and scheduling is coordinated from our Atlanta office with local crews dispatched to Johns Creek. No “call for a quote” runaround. The price you see before work starts is the price you pay.
Our Duct Repair & Sealing Services in Johns Creek
Flex Duct Repair
Flex duct is the soft, insulated tubing that carries conditioned air from your plenum (the main distribution box) to each room’s register. In Johns Creek’s 1990-2008 subdivisions, flex duct was installed extensively because it was faster and cheaper than metal in large, multi-zone homes. That flex is now 20-30 years old. It sags at bends, crushes where support straps have failed, and separates at collar connections inside hot attics. We replace damaged flex runs with new, properly supported duct, using professional-grade equipment from Rotobrush and Nikro for source removal before the new material goes in. In a three-zone Medlock Bridge home, this can mean repairing 150+ linear feet across two or three attic spaces.
Duct Sealing
Unsealed duct joints leak conditioned air into your attic or crawlspace before it ever reaches your rooms. The Department of Energy estimates typical homes lose 20-30% of conditioned air this way; in Johns Creek’s multi-zone systems with dozens of additional junction points, that percentage often runs higher. We seal accessible joints with mastic sealant (a thick, fiber-reinforced paste that remains flexible after curing) and mechanical fasteners. We don’t use duct tape - it dries and fails within months in Georgia attic heat. Every sealed joint is photographed before and after, and the photo record is included in your job documentation.
Mastic Sealant Application
Mastic is the professional standard for sealing duct joints, wyes, and plenum connections. We apply it with brushes and spatulas to ensure complete coverage at every seam, then allow proper cure time before pressurizing the system. In Johns Creek’s heavily wooded lots, where return systems pull in exceptional pollen loads every spring, a tight mastic seal prevents that debris from infiltrating through gaps and accumulating at junction points. We use Guardsman-grade sealant compounds rated for the temperature swings of Georgia attics. The work is slow and methodical. There’s no shortcut.
Metal Duct Repair
Some Johns Creek homes, particularly earlier builds in Abbotts Bridge and select custom properties, use galvanized steel trunk lines with flex branch takeoffs. Metal ducts don’t sag like flex, but they corrode at seams, separate at drive cleats, and develop pinhole leaks where insulation has trapped moisture against the steel. We repair metal trunk lines with proper sheet-metal patches, sealed with mastic and secured with screws - not foil tape. Where metal is too far gone, we fabricate replacement sections to fit.
Duct Insulation
Damaged or missing insulation on ductwork in unconditioned spaces wastes energy and promotes condensation. In Johns Creek’s humid Piedmont climate, sweating ducts are common in spring and fall when attic temperatures fluctuate. We replace insulation with foil-faced fiberglass wraps or closed-cell foam where appropriate, sealed at all seams to prevent moisture intrusion.
Air Leak Repair
Beyond the ductwork itself, we repair leaks at the plenum, filter rack, and equipment cabinet connections - points where conditioned air escapes before entering the duct system. In multi-zone Johns Creek homes, each air handler has its own plenum and filter assembly, meaning more potential leak points per house than standard single-system designs.
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 Johns Creek
CleanRun crews carry professional-grade equipment from Abatement Technologies, Rotobrush, Nikro, and Guardsman - brands you can look up independently before agreeing to any work. We don’t use shop vacs with brush attachments and call it duct cleaning. For sealing work, we stock mastic compounds, mechanical fasteners, and replacement flex duct in standard diameters so most Johns Creek repairs don’t wait on parts. Our negative-pressure extraction systems are manufactured by Abatement Technologies, and our agitation tools come from Rotobrush. If you’re researching what equipment a company actually brings into your home, those are the names to verify.
Common Duct Repair & Sealing Problems We See in Johns Creek Homes
- Triple the flex-duct connections, triple the failure points. Because most Johns Creek homes built 1990-2008 in master-planned subdivisions like Medlock Bridge and St. Ives run two or three air handlers for separate zones, a duct repair here often means sealing junctions in 2-3 attics at once - triple the flex-duct connection points of a typical Atlanta-area house. Each junction is a potential leak, and each leak compounds the system’s efficiency loss.
- Sagging flex at bends and crumbling mastic. Aging 20-30-year-old flex runs sag at bends and connections inside multi-zone attics, letting conditioned air leak into unconditioned space before reaching registers. The mastic applied at original construction has dried and cracked; we find it flaking off collar connections like old paint.
- Pollen infiltration accelerating seal degradation. Wooded Johns Creek lots dump heavy pine, oak, and sweet gum pollen through return grilles every spring; moist organic debris then colonizes old flex duct, accelerating seal failure at joints. The pollen film you wipe off your car in April is the same material coating the inside of your return system.
- The forgotten third air handler. Many Johns Creek homes have a finished basement or lower-level bonus room served by a third, often-forgotten air handler tucked in a utility closet; technicians who only service the two main-floor units leave the basement flex runs - the dampest and most mold-prone in the house - completely uncleaned, a pattern local techs encounter repeatedly in the Medlock Bridge and Shakerag neighborhoods. Those damp, unsealed runs leak continuously.
Pricing for Duct Repair & Sealing in Johns Creek, GA
We publish ranges because Haven Standard Clause 1 requires a written price before work starts - no exceptions. For Johns Creek’s market, typical costs run as follows:
| Service | Typical Range |
|---|---|
| Single-zone duct sealing (mastic, accessible joints) | $280-$450 |
| Multi-zone duct sealing (2-3 air handlers) | $450-$750 |
| Flex duct repair/replacement (per run) | $180-$340 |
| Full flex duct replacement, multi-zone home | $950-$1,800 |
| Metal duct repair (patch, seal, insulate) | $220-$480 |
| Duct insulation replacement | $160-$320 per run |
What moves the number: linear footage of ductwork, number of zones, attic access (some Johns Creek homes have finished attic spaces or tight scuttle holes), and whether we need to repair or replace. A 6,000-square-foot St. Ives home with three air handlers and finished basement will land higher than a 3,200-square-foot Abbotts Bridge two-story with two zones and open attic access. We assess on site, put the scope and price in writing, and only then begin work. Estimates are free. Call (678) 693-5322.
We Also Serve Cities Near Johns Creek
CleanRun crews work throughout north metro Atlanta. If you’re in Johns Creek or nearby - Cumming, Buford, Milton, Suwanee - the same H.A.V.E.N. Standard applies: written price first, documented photo record on every visit, 365-Day Done Right Promise on every job. Dispatch is coordinated from our Atlanta office with local crews serving your area.
Serving Johns Creek, GA - Our Local Coverage Area
We’re based in the Johns Creek 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 Johns Creek
Check for weak airflow at basement registers, musty odors when the system runs, or temperature differences of more than 4-5 degrees between basement and main floors. In Johns Creek’s Shakerag and Medlock Bridge neighborhoods, we regularly find this third handler untouched from original construction, with flex runs that have sagged and leaked for years. The basement zone is also the most humid, making unsealed joints prone to mold colonization. Call (678) 693-5322 and we’ll inspect all three systems, photo-document what we find, and put a written repair scope in front of you before any work starts.
Yes. We work in tight attics regularly - it’s standard in 1990s-2000s Johns Creek construction where scuttle holes were sized for inspection, not equipment. Our crews use compact negative-pressure units from Nikro and flexible agitation tools that fit where standard equipment won’t. We protect finished spaces below with drop cloths and containment as needed. The work takes longer with restricted access, and we’ll note that in the written scope so you know exactly what you’re paying for.
Visible sags or kinks in attic flex runs, separated collar connections, crushed sections where support straps failed, and temperature imbalances between rooms served by the same zone. Cleaning removes debris; it doesn’t fix structural duct damage. If your flex duct is 25-30 years old, the material itself is nearing end of life - the inner liner becomes brittle, insulation compresses, and leaks worsen even after cleaning. We photograph the condition and show you exactly what we’re seeing before recommending repair versus replacement.
Johns Creek’s planned communities deliberately preserved dense pine, oak, and sweet gum canopy, and that tree cover produces pollen loads heavier than more developed suburbs. Unsealed return systems pull that pollen directly into ductwork through gaps at plenum connections, filter racks, and junction points. Once inside, moist organic debris accumulates at leaks, accelerating mold growth and further degrading seals. Sealing the system tight is the only way to stop the cycle - cleaning alone just removes what’s already there. The urgency is higher here because the pollen load is higher, and the duct systems are older.
Yes. NADCA ACR, the Assessment, Cleaning, and Restoration standard, governs our inspection and cleaning protocols, and we apply its principles to repair work - containment, negative-pressure extraction, HEPA filtration, and post-work verification. For multi-zone Johns Creek homes, we extend that rigor across all air handlers, not just the two most accessible. Every zone gets inspected, photographed, and documented. The 365-Day Done Right Promise applies to the complete system, not just the runs we could reach easily.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Johns Creek since 2013.