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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Before
AfterFast, Reliable Duct Repair & Sealing Across Alpharetta
Most Alpharetta duct repair calls we receive aren’t from sudden breakdowns. They’re from homeowners in Windward, Crooked Creek, or near Avalon who notice a room that never cools evenly, a persistent dusty smell, or utility bills that climbed without explanation. These symptoms usually trace back to the same root cause: the original flex duct and duct board installed during the 1990s and early 2000s building boom has reached end-of-life all at once across entire subdivisions.
Our crews are scheduled from the Atlanta office and serve Alpharetta daily. We’re familiar with the specific HVAC layouts in the city’s oversized two-story homes - multiple zones, attic-run flex duct, and the original plenums that are now failing in predictable patterns. If you’re seeing signs of duct degradation, call (678) 679-7540 for a free written estimate. Every quote arrives before any work begins, under Haven Standard Clause 1.
Why CleanRun Air Duct Cleaning Alpharetta Is Alpharetta’s Preferred Duct Repair & Sealing Company
We’ve worked in Alpharetta homes since 2013, and the documentation we leave behind tells the story better than any marketing claim. Every job concludes with a Documented Photo Record - before and after images of every duct run, delivered to the customer as a standard deliverable. Our Duct Repair & Sealing in Alpharetta customers receive a written scope, a written price agreed before work starts, and photographic proof of what was found and what was fixed.
The 365-Day Done Right Promise backs every repair in writing: if the work is not right, we make it right. Not a policy subject to manager approval - a written guarantee. Our technicians are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. Equipment on every truck includes professional-grade tools from Rotobrush, Nikro, and Abatement Technologies - brands customers can verify independently.
We also offer a Free Second Opinion on Any Written Estimate. Bring a competitor’s quote; we put our number next to it in writing, with line-item clarity. No “call for pricing.” No per-vent bait-and-switch. One flat price per system, agreed before a single panel comes off.
Our Duct Repair & Sealing Services in Alpharetta
Duct Sealing
Alpharetta’s extended cooling season - systems running from April through October - means ducts operate under negative pressure for months without rest. We seal supply and return joints with mastic sealant and metal-backed tape, not the failing cloth-backed tape original installers often used. In a typical Alpharetta two-story home, sealing a complete system runs $450-$850 depending on accessibility and the number of wyes and boots. The payoff is measurable: sealed systems don’t pull humid attic air into conditioned space, and rooms that were previously starved of airflow finally receive their designed volume.
Flex Duct Repair
This is the work we perform most often in Alpharetta’s 1990s subdivisions. Original flex duct in Windward, North Point, and similar communities has spent two to three decades in 140-degree attic cavities. The inner liner cracks. The insulation compresses. The wire helix rusts through. We replace failed sections with new R-8 flex duct, secure with proper tension straps, and reconnect at boots with mechanical fasteners - not tape alone. A single run replacement in Alpharetta typically costs $280-$520; multiple runs in a large home can reach $1,200-$2,400 for a complete zone.
Metal Duct Repair
Some Alpharetta homes, particularly custom builds near the Country Club of the South, used galvanized trunk lines rather than flex. These develop seam separation and rust-through at low points where condensation collects. We cut out damaged sections, fabricate replacement pieces, and seal with mastic. Metal repair runs higher than flex - $650-$1,400 for typical trunk work - but the 30-plus-year lifespan justifies the investment when the original infrastructure is sound.
Duct Insulation
Unconditioned attic space in Alpharetta routinely exceeds 130 degrees in July. Duct insulation that has compressed, torn, or absorbed moisture loses R-value and bleeds cooling capacity before air reaches the register. We install new foil-faced insulation or replace the duct entirely when the inner liner is compromised. Insulation work ties directly to sealing - there’s little point in insulating a duct that still leaks at every joint.
Mastic Sealant Application
Mastic is the standard we apply on every sealing job in Alpharetta. Unlike tape, which degrades in attic heat, mastic remains flexible and airtight for decades. We brush-apply it to every joint, wye, and boot connection we can access. The material is messy, slow to apply, and invisible once work is complete - which is why coupon operators skip it. We document the application in our photo record so the customer can verify what was done.
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.
Before
AfterTrusted Brands We Service in Alpharetta
Our trucks carry Honeywell and Aprilaire zoning components, Abatement Technologies negative-pressure equipment, and Guardsman protective materials - trade-recognized brands we name so customers can research specifications before agreeing to a price. We don’t perform “universal” repairs with whatever fits. When a Windward home’s original Honeywell zone damper has seized after twenty years, we replace with the same manufacturer or a documented equivalent, not a generic substitute that won’t interface with the existing control board. Parts availability means faster turnaround for Alpharetta customers; we don’t order-and-hope.
Common Duct Repair & Sealing Problems We See in Alpharetta Homes
- Fiberglass liner shedding from original duct board plenums. In 1990s Alpharetta subdivisions like Windward, the original plenum - the box where the air handler connects to the duct system - was built from duct board with a fiberglass interior face. After twenty-plus years of humidity cycling, the adhesive fails and the liner releases particles directly into supply air. Homeowners notice a persistent dusty smell or respiratory irritation. The camera finds it; the photo record proves it.
- Crushed or disconnected flex duct in attic runs. Alpharetta’s large homes run flex duct across long attic spans. Over time, the wire helix fatigues, the duct sags, and it either crushes flat or pulls completely free at the boot. A cleaning visit sometimes reveals a register with zero airflow - the duct is lying disconnected ten feet away in the insulation. No cleaning fixes that. Reconnection or replacement does.
- Disconnected joints pulling humid attic air into supply. Georgia’s humidity doesn’t stay outside. When tape fails at a wye or boot, the negative pressure inside the duct draws 90-degree, moisture-laden attic air directly into the system. The result is microbial growth on the duct interior, musty smells, and energy bills that climb as the system works harder to cool air it just reheated. Sealing stops the infiltration.
- Collapsed return ducts in two-story homes. Alpharetta’s oversized homes often run returns through wall cavities or chase boxes that weren’t properly supported. The return duct collapses partially or fully, starving the air handler of return volume. The system runs longer, the evaporator coil ices, and the homeowner pays for performance they never receive.
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 never surprise the customer who read this page.
| Service | Typical Range in Alpharetta |
|---|---|
| Duct sealing (per system) | $450 - $850 |
| Single flex duct run replacement | $280 - $520 |
| Multiple flex duct runs (zone) | $1,200 - $2,400 |
| Metal trunk repair | $650 - $1,400 |
| Duct board plenum rebuild | $800 - $1,600 |
| Mastic sealant application (add-on) | $180 - $340 |
What moves a job toward the higher end: limited attic access in a steep-roof two-story, multiple HVAC zones requiring separate work, or discovery of additional failed runs after camera inspection begins. What keeps costs down: accessible attic space, single-zone systems, and scheduling repair alongside a cleaning visit when the crew is already on site. Every estimate is free, written, and valid for thirty days. Call (678) 679-7540 to schedule.
We Also Serve Cities Near Alpharetta
Our crews work daily in Roswell, Duluth, Woodstock, and Holly Springs - the same documentation standards, the same written pricing, the same equipment. But Alpharetta’s specific housing cohort - that concentrated wave of 1990s-2000s multi-zone homes hitting end-of-duct-life simultaneously - makes it unique in our service area. If you live in one of these neighboring cities and own a similar-vintage home, the same failure modes likely apply. Our Duct Repair & Sealing team can assess and quote.
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
Yes, and in Alpharetta’s 1990s subdivisions, it wears out on a neighborhood schedule rather than a household one. The original flex duct installed during the building boom was rated for roughly 20-25 years in ideal conditions; Georgia’s attic heat and humidity cycling shave years off that. In Windward and similar communities, we’re now seeing systemic failures - not one unlucky home, but dozens on the same street with crushed, cracked, or disconnected runs. Call (678) 679-7540 for a camera inspection that will show you exactly where your system stands.
We start with a camera inspection of every accessible run, documented in the photo record you’ll receive. For a typical 3,500-square-foot Alpharetta home with two zones, we find the failure points - usually crushed flex, disconnected boots, or degraded plenums - then present a written scope and price before any repair begins. Work typically takes four to six hours for a single zone, longer for multiple zones or plenum rebuilds. The crew leaves with every joint sealed, every new run tension-strapped, and every repair in your photo record.
Almost certainly. Weak airflow to a single room in an Alpharetta two-story home usually means a crushed, disconnected, or severely leaking supply run. The musty smell suggests humid attic air is infiltrating through a failed joint, or the reduced airflow is allowing moisture to stagnate in the duct. A camera inspection will locate the exact failure; repair and sealing typically resolves both symptoms. The photo record lets you verify the before-and-after difference yourself.
Alpharetta’s housing stock is older and larger, with more attic-run duct exposed to more extreme conditions for longer. A 2020 build in a newer suburb likely has R-8 flex, properly sealed joints, and shorter duct runs. A 1998 Windward home has original R-4 or R-6 flex, cloth-backed tape that failed years ago, and 80-foot runs through 140-degree attics. The energy penalty of leakage is multiplied by system size and runtime. Sealing a leaky Alpharetta system often delivers more measurable improvement than replacing a newer system elsewhere.
No. Cleaning removes debris from intact ductwork; it cannot restore airflow through a crushed or disconnected run, and it cannot stop fiberglass particles from shedding off a degraded duct board plenum. In fact, aggressive cleaning on compromised ductwork can worsen the damage. We evaluate every Alpharetta home for structural integrity before cleaning, and we flag repairs that must precede or accompany the cleaning. The written scope separates cleaning from repair so you understand exactly what each line item addresses.
Schedule Your Free Duct Repair & Sealing Estimate in Alpharetta
Call (678) 679-7540 to speak with a live person - 24 hours a day, seven days a week. We’ll schedule a camera inspection at your Alpharetta home, deliver a written price before any work begins, and leave you with a Documented Photo Record of every duct run we touched. The 365-Day Done Right Promise applies to every repair. No per-vent pricing. No hidden charges. Just documented work at an agreed price.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Alpharetta, serving Alpharetta since 2013.
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