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
Duct repair and sealing in Alpharetta typically runs $280-$680 for most residential jobs, with full-system flex duct repairs on large multi-zone homes reaching $900-$1,400. We’re usually scheduling within two to three business days for Alpharetta homeowners, with crews dispatched from our Atlanta coordination office. Call (470) 326-1926 for a written estimate before any work starts.
We’ve been working in Alpharetta since 2013, and the housing stock here is unlike anywhere else in the metro. The planned-community boom of the late 1980s through 2005 filled Windward, Nesbit Ferry, and the GA-400 corridor with 3,000-5,000 square foot homes that now sit at exactly the age where original flex duct fails. Our Duct Repair & Sealing crews know these attics. We know the boot-collar separations that develop in hot, unconditioned spaces above two-story plans. We know how Alpharetta’s retained tree canopy drives pollen loads that older systems were never sealed against. That local knowledge changes what we find and how we fix it.
Why CleanRun Air Duct Cleaning Johns Creek Is Alpharetta’s Preferred Duct Repair & Sealing Company
Alpharetta homeowners research before they call. We built our company for exactly that customer.
Our reputation here rests on documentation, not promises. Every job starts with a written price delivered before a single panel comes off - Haven Standard Clause 1, no exceptions. Every job ends with a Documented Photo Record showing the inside of every duct run, before and after, delivered as a standard deliverable. Since 2013, we’ve served 52,000+ homes with this protocol. The 365-Day Done Right Promise is written on every invoice, not just stated in marketing copy. If the work isn’t right, we make it right.
Technicians serving Alpharetta are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. They carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, brands customers can verify independently. Our license number is published on this page, not buried in a footer.
Response time to Alpharetta neighborhoods typically runs two to three business days for standard scheduling. Dispatch and scheduling are coordinated from our Atlanta office, with crews serving Alpharetta locally. We don’t manufacture urgency. Duct repair is a scheduled job, and we treat it that way.
Our Duct Repair & Sealing Services in Alpharetta
Duct Sealing
Alpharetta’s 1990s-2000s homes lose conditioned air through joints, seams, and collar separations that developed during two decades of thermal cycling in hot attics. Our duct sealing service uses mastic sealant and mechanical reinforcement to close these pathways permanently. On a typical Windward-area home, we find 15-30% airflow loss through unsealed connections before we start. After sealing, that loss drops below 5%. The work is photographed, measured, and documented.
Flex Duct Repair
This is where Alpharetta’s housing stock diverges from the rest of metro Atlanta. Original flex duct in these large planned-community homes was installed rapidly during tract construction, often with inadequate support straps in unconditioned attics. The result: sagging, crushing, and boot-collar separation that creates low-point pockets trapping debris. Flex duct repair in Alpharetta typically involves replacing damaged sections with properly supported new flex, reattaching separated collars, and sealing with mastic. A full-zone replacement on a 3,500 square foot home runs $600-$950.
Metal Duct Repair
Older Alpharetta homes and custom builds in areas like downtown Alpharetta near Main Street sometimes use galvanized metal ductwork. We repair separated seams, corroded sections, and failed dampers. Metal duct repair here typically runs $350-$720 depending on accessibility and extent. Where metal transitions to flex - common in additions and renovations - we pay particular attention to the joint integrity.
Duct Insulation
Alpharetta’s long cooling season and 70%+ relative humidity from May through September mean condensation inside attic ductwork is a constant threat. Degraded insulation on flex or metal runs creates thermal bridging that drips moisture into ceiling cavities. We replace failed insulation with vapor-barrier-wrapped material rated for Georgia attic conditions. Spot insulation repair runs $180-$340; full-system re-insulation on a large multi-zone home reaches $800-$1,200.
Mastic Sealant Application
Water-based mastic is the standard for durable duct sealing in Alpharetta’s climate. Unlike tape, which degrades in attic heat, mastic remains flexible and airtight for decades. We apply it to every accessible joint, collar, and seam during repair work. The material is specified in our written scope before work begins, and its application is photographed.
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
Our equipment roster includes Rotobrush for mechanical agitation in residential duct runs, Nikro for negative-pressure extraction systems, and Abatement Technologies for HEPA containment and air scrubbing. We stock common flex duct diameters, collar sizes, and mastic compounds for Alpharetta’s predominant housing stock, which means most repairs don’t wait on parts. For specialized components - certain zone damper actuators, custom transition fittings - we source from regional suppliers with two-day turnaround. Customers can verify every brand we name; we don’t use equipment we can’t document.
Common Duct Repair & Sealing Problems We See in Alpharetta Homes
- New-build handover debris. Recently completed homes in Alpharetta’s ongoing development areas - particularly near Westside Parkway and the Encore corridor - often contain drywall dust, construction grit, and wood particulate in supply and return ducts. This material pulls through the air handler for months, accelerating blower motor wear and loading filters prematurely. We document this with camera inspection and remove it with source extraction.
- Sagged flex dropping off boot collars in Windward-area attics. Original flex duct installed during rapid 1990s subdivision build-out was often supported with straps spaced too far apart for the long runs in large homes. Gravity and thermal cycling do the rest. The registers below still blow air, so homeowners don’t know conditioned air is leaking into the attic until energy bills climb or a camera inspection reveals the separation.
- Pollen accumulation in horizontal flex runs. Alpharetta’s position in the Piedmont and its extensive tree canopy generate pollen counts that regularly rank among the highest in metro Atlanta. The notorious yellow pine surge each spring loads return-air systems and settles in low-point duct sections, particularly where flex has sagged. Combined with humidity, this becomes a substrate for mold.
- Condensation-driven mold in attic duct insulation. From May through September, Alpharetta’s relative humidity stays above 70% and attic temperatures exceed 130°F. Flex duct with degraded insulation experiences repeated condensation cycles. The outer vapor barrier fails, moisture penetrates, and mold colonizes the fiberglass layer. Sealing and re-insulation is the only durable fix.
Pricing for Duct Repair & Sealing in Alpharetta, GA
We publish ranges because Haven Standard Clause 1 requires a written price before work starts. Here is what duct repair and sealing costs in Alpharetta’s market:
| Service | Typical Range in Alpharetta |
|---|---|
| Single-point leak repair (mastic seal) | $180-$280 |
| Zone-level flex duct repair (reattach, seal, spot replace) | $380-$620 |
| Full-zone flex duct replacement with sealing | $600-$950 |
| Metal duct seam repair / section replacement | $350-$720 |
| Duct insulation repair (spot) | $180-$340 |
| Full-system re-insulation (large multi-zone home) | $800-$1,200 |
| Comprehensive sealing + repair package (3+ zone home) | $900-$1,400 |
What moves a job within these ranges: accessibility of attic access points, extent of original flex degradation, number of zones affected, and whether construction debris requires source removal before sealing. Every estimate is free, written, and delivered before work begins. Bring a competitor’s written quote; we’ll provide a Free Second Opinion with our number beside it.
Call (470) 326-1926 for an exact quote on your Alpharetta home.
We Also Serve Cities Near Alpharetta
Our crews work throughout the north metro, including Alpharetta and neighboring Roswell, Duluth, Woodstock, and Holly Springs. The housing stock in Roswell includes older ranch homes with different duct configurations; Duluth and Woodstock share Alpharetta’s 1990s-2000s planned-community profile but with distinct subdivision vintages. We adjust our inspection protocol for each.
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
Construction debris routinely remains in ductwork at handover. Drywall dust, wood particulate, and insulation fragments from the build process settle in supply and return runs, then pull through your air handler for months. In Alpharetta’s active development corridors near Westside Parkway, we’ve documented 2-4 inch debris buildups in homes less than a year old. The builder’s rough clean doesn’t reach the duct interior. Call (470) 326-1926 for a camera inspection and written estimate.
You probably won’t know from the registers alone. In Windward, we regularly find separated collars where airflow still reaches the vent through attic leakage, so rooms feel “fine” while 20-30% of conditioned air escapes into unconditioned space. Warning signs: uneven temperatures between floors, energy bills that climbed without explanation, or dust accumulation around ceiling registers. A camera inspection reveals the separation definitively. We include this in our standard assessment.
It ends up inside. Alpharetta’s pollen counts, driven by dense pine and hardwood canopy, are among the highest in metro Atlanta. Your return-air system pulls outdoor air through intake vents; pollen particles smaller than 10 microns pass standard filters and settle in duct runs, especially where flex has sagged to create low-point traps. We’ve extracted pounds of compacted pollen from horizontal runs in Alpharetta attics. The material is photographically documented.
Three factors converge here: the large flex-duct surface area in unconditioned attics, the 70%+ relative humidity from May through September, and the pollen debris that provides organic substrate. Older intown Atlanta neighborhoods often have shorter duct runs in conditioned basements or crawl spaces. Alpharetta’s 1990s-2000s homes put extensive flex through the hottest, most humid attic environment in the house. Condensation cycles are inevitable when insulation degrades. Call (470) 326-1926 if you suspect mold; we document with photography and specify remediation in writing.
We start with a written price based on zone count and accessible attic area - Haven Standard Clause 1. Then camera inspection of every accessible run, with photos shown to you in real time. We mark separated collars, degraded insulation, and debris accumulation. Repair work follows: reattach and mastic-seal collars, replace damaged flex sections with properly supported material, apply mastic to all joints, replace failed insulation. We pressure-test where applicable. The visit concludes with a Documented Photo Record of every run, before and after, delivered as part of your job record. A typical 3-zone home in Windward takes 4-6 hours. Call (470) 326-1926 to schedule.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Alpharetta since 2013.