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 Alpharetta
We dispatch crews to Alpharetta daily from our Atlanta scheduling office, and we’ve spent the last decade mapping the exact duct failure patterns that show up in this city’s subdivisions. Most Alpharetta homeowners who call us aren’t dealing with a simple dirty duct. They’re dealing with 1990s and early-2000s flex duct that has pulled apart inside wall cavities, stapled boot connections that have failed after 25 years of Georgia humidity, and multi-zone systems where air is leaking into attic space instead of reaching the second floor. We repair and seal ductwork in Alpharetta homes with a written price delivered before any panel comes off, and we document every run with before-and-after photos you’ll receive as part of the standard job record. Call (678) 904-9744 for a free estimate.
Why CleanRun Air Duct Cleaning Sandy Springs Is Alpharetta’s Preferred Duct Repair & Sealing Company
Alpharetta’s housing stock is unlike neighboring cities. The residential build-out from the late 1980s through the mid-2000s produced thousands of large-footprint homes, commonly 3,000 to 5,000-plus square feet, with builder-grade flexible ductwork that is now 15 to 30 years old. That specific age range, combined with Georgia Piedmont humidity and some of the highest recorded seasonal pollen counts in the United States, creates a concentrated demand wave for duct repair and sealing that we see more densely here than in Roswell, Duluth, or Suwanee. Our crews know the difference between a Windward subdivision built in 1994 and a newer development off Haynes Bridge Road because the failure pattern is different, and that matters for the scope we write.
Our Duct Repair & Sealing team has served more than 52,000 homes since 2013, every one with a written price before work started and a documented photo record when the crew left. In Alpharetta specifically, we regularly return to the same subdivisions for repeat referrals, which tells us the work holds up. The 365-Day Done Right Promise backs every job in writing, not as a policy subject to manager approval.
All technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. We publish our license number on every page because credentials should be verifiable, not buried in a footer.
Scheduling is coordinated from our Atlanta office, and crews carry the full equipment roster, Rotobrush and Abatement Technologies systems included, so Alpharetta jobs aren’t delayed waiting on parts.
Our Duct Repair & Sealing Services in Alpharetta
Flex Duct Repair
Alpharetta’s large two-story homes from the 1990s and 2000s were built with exceptionally long flex-duct runs, often 30 to 50 feet per zone, that sag between undersupported joints and collapse at elbows. The inner liner tears, the insulation gets wet from condensation, and the spiral wire support separates at boot connections. We cut out failed sections, install new flex duct with proper support straps every 4 feet, and rebuild connections with mechanical clamps plus mastic sealant, not staples. On a typical Alpharetta job off Windward Parkway or Old Milton Parkway, we’re replacing 15 to 40 linear feet of flex duct per system.
Duct Sealing
Most Alpharetta homes we inspect have supply-side registers that look clean while the hidden boot connections inside wall cavities leak conditioned air into unconditioned space. Our sealing process starts with a scope inspection of every boot, then we apply mastic sealant, the thick paste that hardens into a permanent airtight bond, to all joints, seams, and connections. We use Guardsman-grade sealant products and mechanical fasteners, not tape, because tape fails in Alpharetta’s attic temperature swings. Every sealed joint is photographed before and after.
Metal Duct Repair
Older Alpharetta homes and newer custom builds sometimes use galvanized steel ductwork, particularly in basement mechanical rooms and for main trunk lines. We repair separated seams, replace rusted sections, and install new takeoffs where the original fittings have failed. Metal duct in Alpharetta’s humid climate corrodes at the seams first, and we address that with proper sealing and, where needed, insulation replacement to prevent exterior condensation.
Duct Insulation
When flex duct insulation in Alpharetta homes gets wet from condensation or pest damage, the R-value drops and the duct becomes a thermal bridge. We replace water-damaged insulation with new vapor-barrier-wrapped material, properly sealed at all terminations. In Alpharetta’s summer conditions, with dew points routinely in the low-to-mid 70s°F, uninsulated or compromised duct in attic space can lose 15 to 25 percent of cooling capacity before the air reaches the register.
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 Alpharetta
We stock parts and use equipment from Aprilaire, Abatement Technologies, Rotobrush, and Guardsman on Alpharetta jobs, which means most repairs don’t wait on a parts run. Our crews carry flex duct in common diameters, mastic sealant, mechanical clamps, and replacement boots so that when we scope a Windward home and find a stapled boot connection that has pulled apart, we can repair it same visit after you approve the written scope. We don’t use equipment you can’t look up yourself.
Common Duct Repair & Sealing Problems We See in Alpharetta Homes
- Stapled boot connections failing inside wall cavities. In 1990s Alpharetta subdivisions like Windward, original flex duct was often stapled rather than clamped and mastic-sealed at register boots. After 25-plus years, those staples pull loose and the connection separates, venting conditioned air into wall cavities and pulling attic humidity into the duct run. The visible register looks clean; the camera shows the gap.
- Sagging long flex-duct runs in large homes. Alpharetta’s 3,000 to 5,000-plus square foot two-story homes have unusually high linear footage of duct per system. Unsupported flex duct sags between joints, creating low points where debris and moisture collect. The restriction reduces airflow to distant rooms, which is why that upstairs bedroom stays hot.
- Multi-zone return-side leaks. Homes with two or more air handlers and multiple return plenum chambers are often sealed only at the visible supply side. Return-side gaps short-circuit airflow, reduce static pressure control, and pull unconditioned attic air into the system. We find these with smoke pencil testing and scope inspection.
- Pollen-loaded ducts accelerating microbial growth. Alpharetta’s pine and oak pollen from March through May overwhelms standard 1-inch filters and loads ductwork with organic debris. Combined with summer dew points in the 70s°F, the interior of uncleaned flex duct becomes a persistent moisture environment that supports mold colonization, particularly at failed joints where air leakage creates temperature differentials.
Pricing for Duct Repair & Sealing in Alpharetta, GA
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts, and that price should not be a surprise.
| Service | Typical Range in Alpharetta |
|---|---|
| Single boot connection repair with mastic sealant | $180 - $340 |
| Flex duct section replacement (per 25 ft run) | $320 - $580 |
| Whole-system duct sealing with mastic (avg 2,500-4,000 sq ft home) | $1,400 - $2,600 |
| Multi-zone system sealing and rebalancing | $2,200 - $3,800 |
| Duct insulation replacement (per run) | $260 - $480 |
What moves the price: linear footage of duct, accessibility (crawl space vs. finished basement), number of zones, and whether we find hidden wall-cavity leaks that require drywall access. Every estimate includes the full scope in writing before work begins, and we offer a Free Second Opinion on any competitor’s written estimate. Call (678) 904-9744 for your exact quote.
We Also Serve Cities Near Alpharetta
Our crews work daily in Alpharetta and the surrounding area, including Roswell, Duluth, Holly Springs, and Suwanee. The duct failure patterns differ by city, Roswell has more 1970s metal duct, Duluth more 2000s builds with different flex standards, and we adjust our scope accordingly.
Serving Alpharetta, GA - Our Local Coverage Area
We’re based in the Alpharetta 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 Alpharetta
The most reliable indicator is a hot or cold room on a system that used to condition it evenly, combined with a musty smell near registers that persists after filter changes. We verify with a camera scope inspection of the boot connections, which shows whether the inner liner has separated from the collar inside the wall cavity. On a two-story home off Windward Parkway, our tech scoped a 1990s flex-duct run after the homeowner complained of a hot upstairs bedroom and a musty smell near the registers. The camera inspection showed a boot connection that had been stapled and never mastic-sealed, with a torn inner liner and dark microbial growth in the wall cavity; we repaired the flex duct, rebuilt the connection with mastic sealant on a new boot collar, and rebalanced the return, which restored airflow and stopped the moisture source. Call (678) 904-9744 to schedule a scope inspection.
Because the problem is usually a separated duct or leak, not debris. In Alpharetta’s large two-story homes with long flex-duct runs, cleaning removes buildup but does not restore airflow through a collapsed elbow or a boot connection that has pulled apart in a wall cavity. We measure static pressure and airflow at each register to locate the restriction, then repair or seal the specific failure. Call (678) 904-9744 for a diagnostic that includes pressure testing.
Yes, because Alpharetta’s March-through-May pollen loads, particularly pine and oak, overwhelm standard filters and deposit organic debris in ductwork. When that debris collects at a failed joint where humid attic air is entering the system, the moisture and nutrient source accelerates microbial growth. Repairing the leak stops the moisture intrusion, which is more effective than repeated cleaning alone. Call (678) 904-9744 before peak season to scope and seal.
We remove the register, inspect the boot connection with a camera, and if we find staples or failed tape, we rebuild the connection with a new boot collar, mechanical clamps, and mastic sealant applied to all seams. For trunk lines and long flex runs, we seal every joint and seam with mastic, then test with a smoke pencil to verify no leakage. The process takes 4 to 8 hours for a typical Alpharetta home and concludes with a documented photo record of every sealed joint. Call (678) 904-9744 for a written scope specific to your system.
We repair and seal ductwork in individually owned units where the duct system serves that unit exclusively. Shared rooftop or mechanical-room equipment typically requires coordination with the HOA or property management, and we’ll document our scope for their review under Haven Standard Clause 1. We do not perform work on common-area systems without written authorization from the responsible party. Call (678) 904-9744 to discuss your specific building.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Alpharetta since 2013.