Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Fast, Reliable Duct Sealing Across Johns Creek
Duct sealing in Johns Creek typically runs $450 to $1,400 depending on how many runs need attention, and most jobs wrap up in a single day. If you’re losing conditioned air into the attic and your upstairs rooms never quite cool down, the problem is usually leaking flex duct joints, not your AC unit. We know Johns Creek’s housing stock, the way attic ductwork was installed in the 1990s and 2000s, and what it takes to stop the air loss for good. Call (762) 769-7145 and we’ll send a background-checked technician in a marked vehicle, with a written price before any work begins.
Why Hollis Air Duct Alpharetta Is Johns Creek’s Preferred Duct Sealing Company
We work in Johns Creek nearly every week, and we’ve earned a strong local reputation by doing the job the way The Garrison Code requires: arrive inside the quoted window, price it in writing before touching anything, finish the work by the book, and leave the site cleaner than we found it. Homeowners in neighborhoods like Medlock Bridge, Abbotts Bridge, and Bellmoore Park call us because our reviews from Johns Creek customers consistently mention the same things: the written quote didn’t move, the technician was uniformed and background-checked, and the 365-Day Done Right Promise is actually in writing. Roy Castellanos leads our crew, and he holds every technician to the same standard on every single job. Dispatch and scheduling are coordinated from the brand’s Atlanta office, but the crews serving Johns Creek live and work in the north metro and know the streets without a GPS.
Styles & brands we work with
Duct Sealing Services in Johns Creek
Duct Sealing Services in Johns Creek means chasing down every joint, seam, and connection in your attic’s flex duct runs, sealing what’s leaking, and verifying the result with airflow tests at each register. We use Duct Sealing mastic and foil-backed tape, not hardware-store duct tape that dries out and peels in a Georgia attic. A typical Johns Creek home from the 1985-2010 build era has between 12 and 24 joints that may need attention, and most cost between $450 and $900. When branches have fully detached or insulation is missing, the total can run higher, toward $1,100 to $1,400.
Joint and Seam Sealing
Every flex duct connection in your attic is a potential leak point. Thermal expansion from Johns Creek’s hot summers works joints loose over time, and we seal each one with mastic that stays flexible. We also inspect and re-support sagging runs so the ductwork doesn’t pull apart again next year.
Detached Branch Repairs
When a flex duct branch has separated from the main trunk, an entire room loses airflow. We reconnect the branch, seal the connection, and verify the register is pulling the volume of air it should. This is one of the most common fixes we perform in larger Johns Creek homes with multiple HVAC zones.
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.
Duct Insulation in Johns Creek
Duct Insulation in Johns Creek matters because conditioned air moving through an uninsulated attic duct loses temperature before it ever reaches your bedroom. Homes from the 1990s often have R-4 insulation on attic ducts, which is thin by today’s standards. We wrap or replace insulation at R-8, which is what current code expects for an unconditioned attic in our climate. Typical duct insulation work in Johns Creek runs $300 to $700 when combined with a sealing job, or $500 to $1,000 as a standalone service depending on the linear feet involved.
Attic Run Wrapping
We use foil-faced insulation wrap secured with mechanical fasteners, not just tape. Johns Creek’s humidity and heat can degrade old insulation quickly, so we look for degraded, compressed, or rodent-damaged sections and replace them properly.
Insulation Repair After Leaks
When condensation forms on a leaking joint, the insulation around it gets soaked and loses its R-value. We cut out the damaged section, seal the duct beneath it, and re-wrap with fresh insulation. This stops both the air loss and the water damage that can follow.
Trusted Brands We Service in Johns Creek
Our crews work with filtration and air quality equipment from Honeywell and Aprilaire, and we use professional-grade negative-air machines from Abatement Technologies for source-removal work. We stock common parts and materials locally so Johns Creek customers aren’t waiting on a warehouse to ship anything. Whether it’s replacing a media filter cabinet that’s letting pollen through or sealing a duct run that serves a whole wing of the house, we explain what we’re using and why in plain terms before we install it.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Johns Creek Homes
- Thermal expansion separating flex duct joints: Attics in Johns Creek swing from 40 degrees in winter to 130 degrees in August. That expansion and contraction works mastic and tape loose over 15 to 30 years, and the joints quietly start dumping conditioned air into the attic.
- Construction debris left from the original build: Homes built in the 1990s and 2000s often had drywall dust and sawdust left in the duct runs at handover. That fine powder coats blower motors, clogs coils, and reduces the effectiveness of any filter you install today.
- Sagging flex duct with insufficient support: Builders used minimum strapping in many Johns Creek subdivisions. Duct runs settle, dip, and create low spots that collect dust and restrict airflow to far rooms.
- Pine pollen coating duct interiors: The dense hardwood and pine canopy in Johns Creek produces a heavy spring pollen load. Standard fiberglass filters let fine yellow pollen through, and it coats the inside of ducts, sticking to surfaces and capturing more dust every cycle. We’ve seen this in Medlock Bridge, Abbotts Bridge, and Bellmoore Park repeatedly.
Pricing for Duct Sealing in Johns Creek, GA
A typical duct sealing job in Johns Creek runs $450 to $900 for the average 2,500 to 3,500 square foot home. Larger homes with multiple systems or many detached branches can reach $1,100 to $1,400. What moves the price is the number of accessible joints, the condition of existing insulation, and how much re-supporting the ductwork needs. You’ll get a written price before any work starts, and that number does not change at the door. Call (762) 769-7145 for a free estimate and a straight answer about what your specific attic needs.
We Also Serve Cities Near Johns Creek
Hollis Air Duct Alpharetta serves Johns Creek and the surrounding north metro area, including Alpharetta, Cumming, Suwanee, and Canton. If you’re in one of those cities and dealing with the same hot attic problems, we bring the same written pricing and the 365-Day Done Right Promise to every job. Our Duct Sealing crews are on the road across this whole corridor every day.
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 About Duct Sealing in Johns Creek
Yes, many of them do. Johns Creek’s rapid development between 1985 and 2010 produced homes where builders were moving quickly, and drywall dust, sawdust, and debris were often left inside duct runs at handover. That debris coats blower motors and reduces the effectiveness of your filters. Newer homes with flexible ductwork can also develop sagging and loose joints within the first few years because attic temperatures here swing widely. We regularly seal and clean ducts in Johns Creek homes that are less than ten years old, and we also offer our Dryer Vent Cleaning in Johns Creek for full-system maintenance. Call (762) 769-7145 and we’ll inspect what you actually have before recommending anything.
The most common cause in Johns Creek’s older sections like Medlock Bridge is a flex duct branch that has partially or fully detached from the main trunk in the attic. When a branch separates, the air handler keeps running but a large share of the air it moves goes straight into the attic. We find this on a significant portion of the sealing jobs we do in that neighborhood. We reconnect the branch, seal the joint with mastic, and verify airflow at the register before we leave. Call (762) 769-7145 to schedule a camera inspection and find out exactly where your air is going.
Sealing alone reduces how much unconditioned attic air gets pulled into your system, but the bigger allergy benefit comes from combining sealing with source removal. Johns Creek’s dense pine and hardwood canopy creates a heavy pollen load every spring, and fine yellow pine pollen gets through standard fiberglass filters and coats duct interiors. Once the duct surfaces are coated, they capture more dust and allergens with every cycle. A proper sealing and cleaning job removes that coating and then closes off the leaks that let attic air back in. Call (762) 769-7145 and ask about combining both services; the estimate is free.
Look for rooms that never reach the thermostat’s set temperature, higher-than-expected summer electric bills, and air handler run times that seem constant on hot days. In Johns Creek, the combination of 90-degree summer days and attic temperatures over 130 degrees means any leak is dumping expensive conditioned air into the hottest part of your house. A camera inspection through your supply registers will show leakage points directly, and the written estimate will tell you exactly what sealing those leaks should cost. Call (762) 769-7145 to book the inspection.
Builders should have sealed every flex duct joint with mastic, supported runs every four to five feet, protected open duct ends during construction, and performed a final cleaning before handover. In many Johns Creek homes built between 1985 and 2010, that did not happen. Debris was left in the ducts, joints were taped with the wrong materials, and runs were under-supported from day one. That is not a problem you caused, and it is fixable. We’ve corrected hundreds of these installs across Johns Creek. Call (762) 769-7145 for an inspection and a written plan.
Written by Roy Castellanos, Owner at Hollis Air Duct Alpharetta, serving Johns Creek and the north metro area.