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 costs $280-$680 for most residential jobs, with flex-duct trunk repairs running higher when multiple belly traps need addressing. We’re the Duct Repair & Sealing crew from CleanRun, and we know these homes. Our scheduling runs through the Atlanta office, but our trucks are in Alpharetta every day of the week. We’ve worked the master-planned communities off Windward Parkway, the winding streets of Northpark, and the wooded lots along Rucker Road. Call (678) 693-5322 and a live person answers, 24/7.
Why CleanRun Air Duct Cleaning Cumming Is Alpharetta’s Preferred Duct Repair & Sealing Company
We’ve been in Alpharetta homes since 2013. Not as a franchise operation. Independently owned and operated under the Haven Standard, with Tomas Reyes leading the company.
Alpharetta customers find us because they want what our previous customers got: a written price before any tool came out of the van, and a photo record of every duct run delivered before the crew left. Haven Standard Clause 1. No exceptions.
Our response time to Alpharetta is same-day scheduling for most repair calls, with crews already working North Fulton routes. We don’t promise dispatch windows we can’t photograph on a GPS log.
Local knowledge matters here. A technician who doesn’t know that Windward’s 1998 builds have 18-inch flex trunks undersupported at joist runs will miss the belly trap. We’ve found that exact failure so many times we carry extra zip ties and mastic on every Alpharetta truck.
Our Duct Repair & Sealing Services in Alpharetta
Duct Sealing
Alpharetta’s 1990s-2010 homes lose 20-30% of conditioned air through leaks before it reaches the register. We pressure-test the system, identify leakage points with a smoke pencil or theatrical fog, then seal with mastic or foil-backed tape rated for Georgia attic temperatures. In a typical Alpharetta two-story, sealing runs $340-$520 for a full system. Every sealed joint is photographed. The customer gets the photo record as a standard deliverable.
Flex Duct Repair
This is the work we do most in Alpharetta. The flex-duct trunks in Windward, Northpark, and similar late-1990s subdivisions were hung with insufficient support straps. Twenty-five years of 130-140°F attic cycling has sagged them into mid-span belly traps. The liner degrades. The collar separates. Red-clay dust and pine debris pools at the low point. We cut out the damaged section, install new flex with proper support spacing, and re-tape with mastic. Typical flex repair in Alpharetta: $280-$450 per run, with written price agreed before work starts.
Metal Duct Repair
Some Alpharetta homes, particularly custom builds near the Chattahoochee River corridor, have galvanized trunk lines. We repair separated seams, replace rusted sections, and re-insulate with fiberglass wrap. Metal work runs $380-$620 depending on access and extent. We use Guardsman-rated materials where code requires.
Duct Insulation
Unconditioned Alpharetta attics destroy R-value. We re-wrap trunk lines with formaldehyde-free fiberglass or replace degraded insulation on flex runs. Insulation work typically pairs with sealing, since the wrap has to come off to access the joints. Combined sealing and insulation jobs in Alpharetta run $520-$840.
Mastic Sealant
We don’t trust tape alone in Alpharetta attics. Mastic, a water-based duct sealant that cures to a flexible, heat-resistant film, is our standard for every joint and collar. We apply it with a brush at every connection point, then photograph the finished bead. It’s slower than slapping on foil tape. It also doesn’t fail in August when the attic hits 140°F.
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 trucks carry Rotobrush source-removal machines, Nikro HEPA-negative-pressure extractors, and Abatement Technologies filtration for containment. We stock flex duct, collars, and mastic rated for Georgia attic conditions, so most Alpharetta repairs don’t wait on parts. When a Northpark customer needs a collar replacement on a Saturday, we have it. The brands are named here so you can look them up before you call. We don’t hide our equipment list behind a “professional-grade” label.
Common Duct Repair & Sealing Problems We See in Alpharetta Homes
- Belly traps in undersupported flex duct. In Windward and Northpark, 18-inch flex trunks have sagged mid-span after 25 years of thermal cycling. The low point pools red-clay dust and pine debris from adjacent loblolly pines. Our camera shows the same accumulation pattern house after house in that vintage.
- Collar separation from flex liner. Alpharetta attics hit 130-140°F in July. The adhesive on 1990s-era collars degrades. The flex pulls away. Conditioned air dumps into the attic before it reaches the second-floor registers. We find this most often on south-facing roof sections over master bedrooms.
- Duct board seam failure. Plenum boxes (the distribution boxes that split air to multiple duct runs) in 1990s builds were often fabricated from duct board with tape-sealed edges. The tape dries and releases. We re-seam with mastic and mechanical fasteners.
- Biofilm and mold in return ducts. Alpharetta sits in one of the highest-pollen-load corridors in the country. Spring pollen infiltrates return-air grilles, combines with summer humidity above 75%, and creates a film inside ductwork that a surface wipe never fixes. We remove it with negative-pressure extraction and mechanical agitation, then photograph the clean surface.
Pricing for Duct Repair & Sealing in Alpharetta, GA
We publish ranges because Haven Standard Clause 1 requires a written price before work starts. Here’s what duct repair and sealing costs in Alpharetta’s market:
| Service | Typical Range |
|---|---|
| Single flex-duct run repair | $280-$450 |
| Full system duct sealing | $340-$520 |
| Metal duct repair (per section) | $380-$620 |
| Duct insulation replacement | $420-$680 |
| Sealing + insulation combined | $520-$840 |
| Mastic application (full system) | $180-$320 |
What moves the price: number of zones, attic access difficulty, extent of liner degradation, and whether we need to remove and replace versus repair in place. A four-zone Windward home with 20-year-old flex throughout will land higher than a single repair on a newer build. We give the exact written price after inspection, not after work begins. Free estimates. No per-vent pricing. No coupon that balloons on arrival. Call (678) 693-5322.
We Also Serve Cities Near Alpharetta
Our crews work daily in Alpharetta, Roswell, Duluth, Holly Springs, and Cumming. Dispatch coordinates from the Atlanta office, but the trucks live on North Fulton routes. If you’re in Milton or Johns Creek and found this page, we cover those too. Same written-price standard, same photo record, same 365-Day Done Right Promise.
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
Every 3-4 years for homes surrounded by mature loblolly and water oak stands, not the generic 5-7 year national figure. The pollen loading here is extreme, and the 1990s flex-duct construction traps debris in belly traps that newer rigid systems don’t form. In Windward and similar subdivisions, we often find significant accumulation at the 3-year mark. Call (678) 693-5322 and we’ll camera-inspect to tell you exactly where your system stands.
Because your attic hits 130-140°F in summer, and the adhesive on 1990s-era flex collars was never rated for sustained heat that high. The thermal cycling expands and contracts the liner until the bond fails. We fix it with mastic sealant and mechanical zip-tie support, not just new tape that’ll fail again next August. Written price before we start. Photo record after.
Only if they have ductwork connected to the main HVAC system, which is uncommon. Most Alpharetta detached garages and pool houses are served by mini-splits or are unconditioned. If you have a workshop or guest house with duct runs from the main unit, we inspect and price it as an additional zone. Bring us the layout and we’ll give you a written scope.
It stops conditioned air from leaking into the attic before it reaches the far registers, which is why your upstairs master never cools evenly. In a typical Alpharetta two-story with four to six zones, sealing the plenum and trunk connections often recovers 20-25% of airflow capacity. We pressure-test before and after to document the improvement. The photo record shows every sealed joint.
Wood heat produces fine ash particulate that infiltrates return-air systems, especially in homes with forced-air distribution. We see this in Alpharetta’s wooded lots where wood stoves supplement the main system. The ash combines with pollen and humidity to form a heavier, more adhesive deposit inside ductwork. We adjust our agitation intensity and extend HEPA containment time. Same written price structure. Same photo documentation.
In Windward, our tech pulled a clogged return at a 1998 two-story and found the 18-inch flex trunk had separated from its collar because the attic regularly hits 130-140°F - sealed with mastic and new zip ties; at a Northpark 5-ton system downstream, we pressure-tested and re-taped a separated run, then ran a camera inspection to confirm no other belly traps before finishing with a Rotobrush source removal.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Alpharetta since 2013.