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 residential jobs, with flex duct replacement running higher for large multi-zone homes. Most homeowners in the St. Ives, Medlock Bridge, and Parsons Run subdivisions call us after noticing uneven temperatures between floors, musty smells from basement air handlers, or utility bills that climb without explanation. We’re dispatched from our Atlanta office, and our crews serve Johns Creek neighborhoods daily. Call (470) 516-9337 for a written estimate before any work starts.
Why CleanRun Air Duct Cleaning Marietta Is Johns Creek’s Preferred Duct Repair & Sealing Company
We’ve worked inside enough Johns Creek homes to know the difference between a 1998 flex run and a 2005 installation. The housing stock here is remarkably consistent - large brick colonials and European-style homes built during the 1990s and early 2000s boom - and that consistency means our technicians recognize failure patterns before the inspection camera even goes in.
Our reviews from Johns Creek customers consistently mention the photo record. They expected a verbal report and got timestamped images of their actual ductwork instead. Haven Standard Clause 1 requires a written price before any work starts, and Clause 3 requires verified, background-checked crews - Tomas Reyes enforces both on every job.
Dispatch and scheduling are coordinated from our Atlanta office, but crews carry Johns Creek-specific parts inventory based on what we know fails in these homes. That means less waiting for flex duct connectors, mastic sealant, or properly sized support straps.
Our Duct Repair & Sealing Services in Johns Creek
Flex Duct Repair
The dominant failure mode in Johns Creek is flex duct degradation in 1990s-era two-story homes. Long runs across attic joist transitions sag, collapse, or pull loose entirely after 25+ years of thermal cycling. We replace collapsed sections with new insulated flex, install proper support straps at every joist penetration, and seal connections with mastic - not tape alone. Our equipment includes Nikro negative-pressure extraction systems and Abatement Technologies HEPA containment for attic work.
Air Leak Repair
Leaks at duct joints and plenum connections waste 20-30% of conditioned air in a typical Johns Creek home, according to Department of Energy estimates. We pressure-test the system, mark every leak location, and repair with mechanical fasteners plus mastic sealant. The finished-basement air handlers common in Medlock Bridge and Parsons Run homes are especially prone to leaks where return runs pass through unconditioned wall cavities. We photograph every repair location before closing access.
Mastic Sealant Application
Metal duct systems in older Johns Creek homes and high-efficiency new construction both benefit from brush-applied mastic at every joint, seam, and register boot. Mastic remains flexible through decades of thermal expansion, unlike foil tape that degrades. We apply to ASTM C916 standards and include the sealed areas in your documented photo record.
Duct Insulation
Supplemental air handlers in Johns Creek finished basements push return duct runs through semi-conditioned or unconditioned spaces. Cold metal surfaces in humid Georgia summers create condensation zones that harbor mold and accelerate fiberglass insulation breakdown. We replace degraded insulation with formaldehyde-free fiberglass or closed-cell foam where appropriate, sealing the vapor barrier completely.
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
Our crews arrive with professional-grade equipment from Honeywell, Aprilaire, and Nikro - brands you can verify independently before agreeing to any work. We stock flex duct, mastic, mechanical fasteners, and insulation sized for the large multi-zone systems typical of Johns Creek’s 4,000-6,000 square foot homes. That inventory means most repairs finish in a single visit, not two.
Common Duct Repair & Sealing Problems We See in Johns Creek Homes
- Collapsed flex duct at attic joist transitions. The long, multi-bend runs in 1990s two-story floor plans sag under their own weight after decades of heat stress. Homeowners call us about “undersized AC” upstairs; we find a collapsed duct dumping conditioned air into the attic.
- Condensation and mold in basement return runs. Finished basements with supplemental air handlers are a Johns Creek signature. Return ducts traversing unconditioned spaces develop cold-surface condensation that feeds mold growth long before the main-floor system shows any problem.
- Pollen-driven sealing breakdown at duct joints. Georgia’s spring pollen season - oak, pine, and sweet gum from the dense canopy along Big Creek and Johns Creek corridors - loads return air pathways with abrasive particulate. This accelerates gasket and tape degradation at joints, creating progressive leak paths.
- Disconnected register boots in expanded or renovated zones. Johns Creek’s custom and semi-custom homes often saw basement finishing or room additions after original construction. Amateur duct extensions frequently separate at register boots, leaking conditioned air into wall cavities.
Pricing for Duct Repair & Sealing in Johns Creek, GA
A typical flex duct repair in Johns Creek runs $280-$450 for a single collapsed run with support strap replacement. Mastic sealing of an entire metal duct system runs $320-$580 depending on access and linear footage. Full flex duct replacement across multiple zones in a large home runs $650-$1,200. Duct insulation replacement for basement air handler returns runs $180-$340 per run.
What moves the number: attic accessibility, number of zones affected, whether the plenum itself needs resealing, and whether we find secondary damage from long-term leakage. We deliver one flat price per system, agreed in writing before work starts - no per-vent pricing, no add-ons after arrival. Every estimate includes the documented photo record as standard. Call (470) 516-9337; estimates are free.
We Also Serve Cities Near Johns Creek
Our Duct Repair & Sealing in Johns Creek crews also work in Marietta, Smyrna, Kennesaw, and Sandy Springs. Each city gets the same written-price-first protocol and documented photo record, though the housing stock and failure patterns differ.
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
It’s usually the ducts, not the equipment. In Johns Creek’s 1990s-era two-story homes, the flex duct runs to upstairs zones are long, multi-bend installations that sag or collapse at attic joist transitions after 25 years. We were called to a two-story brick colonial in the St. Ives subdivision where the upstairs bonus room never cooled, even with the thermostat pushed down. A camera inspection showed the flex run had collapsed and pulled loose at a joist transition, dumping conditioned air into unconditioned space. We reconnected and re-sealed with mastic, added a proper support strap, and the upstairs zone came back within a few degrees of the main floor - confirmed on our return visit. Call (470) 516-9337 for a camera inspection.
Yes, specifically for supplemental air handlers. The return duct runs in finished basements often traverse unconditioned or semi-conditioned spaces, creating cold-surface condensation that feeds mold and dust accumulation far faster than main-floor systems. We regularly find that basement zones need insulation and sealing work years before the upstairs system shows any issue. Call (470) 516-9337 for a zone-by-zone inspection.
Johns Creek’s position along Big Creek and the Johns Creek corridor puts it under one of the densest oak, pine, and sweet gum canopies in the Atlanta metro. Spring pollen loads are severe and prolonged, driving heavy particulate infiltration through any leak in return air pathways. Abrasive pollen accelerates gasket breakdown and tape failure at duct joints, making tight sealing more critical here than in less wooded parts of the metro. Call (470) 516-9337 to schedule sealing before peak season.
Yes. We pressurize the duct system and use calibrated airflow measurement to quantify total leakage to outside spaces. For precise location, we feed a camera through accessible registers and use smoke pencil testing at suspect joints. Most leaks in Johns Creek homes occur at accessible attic transitions, plenum connections, and basement air handler junctions - not inside finished wall cavities. Call (470) 516-9337 to book a non-destructive leak verification.
They’re present in the multi-family developments near Medlock Bridge Road and State Bridge Road, though less common than in denser intown markets. When shared vents occur, duct sealing and proper backdraft prevention are critical for both fire safety and cross-unit odor transfer. Our Duct Repair & Sealing team handles multi-family dryer vent and ductwork repairs under the same written-price protocol. Call (470) 516-9337 for a property-specific assessment.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Marietta, serving Johns Creek since 2013.