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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.
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AfterHow Much Does Duct Repair & Sealing Cost in Sandy Springs?
Duct repair and sealing in Sandy Springs typically runs $450 to $1,850 for most homes, with basic sealing of accessible ductwork starting around $300 and full-system repair with Aeroseal or mastic treatment reaching $2,500 on larger houses. The exact number depends on how much of your ductwork is reachable, how many leaks exist, and whether you need insulation or replacement sections. Most Sandy Springs homeowners pay between $650 and $1,200 for complete duct sealing on a 2,000-square-foot home.
If you’re losing conditioned air into your attic or crawlspace, you’re paying to heat and cool spaces you don’t live in. A duct repair from Duct Repair & Sealing in Sandy Springs stops that waste. Call (229) 489-7780 for a written quote before any work begins.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s what you can expect to pay in the Sandy Springs market as of 2026. These ranges reflect what Hollis Air Duct Sandy Springs sees across homes in neighborhoods like Dunwoody Panhandle, Riverside, and the Perimeter area.
| Service | Typical Cost Range in Sandy Springs | Notes |
|---|---|---|
| Duct inspection & diagnostic | $0 – $150 | Often waived when you book the repair with the inspection |
| Basic duct sealing (accessible ducts) | $300 – $650 | Mastic or foil tape on reachable runs in attic or basement |
| Full duct sealing (all accessible ductwork) | $650 – $1,200 | Complete sealing of supply and return runs on a 2,000 sq ft home |
| Aeroseal injection sealing | $1,500 – $2,500 | Whole-system pressurized sealing, ideal when ducts are buried or hard to reach |
| Duct section repair (single run) | $150 – $400 | Replacing a crushed or disconnected length of flex duct |
| Duct insulation wrap | $2 – $4 per linear foot | R-6 or R-8 wrap around existing metal duct |
| Duct replacement (full system) | $2,500 – $6,000 | Complete tear-out and new ductwork for larger Sandy Springs homes |
What moves the price up or down? The biggest variable is access. Sandy Springs has a mix of ranch homes with crawlspaces, split-levels, and newer construction with ducts in conditioned attics. If your ductwork sits in a tight crawlspace or under a dropped ceiling, labor time increases and so does the cost. The second variable is duct material. Rigid metal ducts seal cleanly with mastic. Old, brittle flex duct may need replacement, not sealing. And if your system has been leaking for years, you may have insulation damage or mold on the duct exterior, which adds remediation cost before sealing can happen.
At Hollis, the price you’re quoted is the price you pay. That’s how it works under The Garrison Standard. Written before any work starts, and it does not move at the door.
Why Duct Sealing Costs What It Does in Sandy Springs
Sandy Springs sits in DeKalb and Fulton counties, and most homes here run central air conditioning from April through October. The humidity in this part of Georgia means conditioned air mixing with unconditioned air isn’t just an energy problem. It creates condensation inside duct runs in attics and crawlspaces, which leads to rust on metal ducts and mold growth on flex duct liners. Sealing prevents that air exchange, but it also means working in hot, confined attics that climb past 120 degrees in July. Technicians who do this work correctly use negative-air machines, rotary brush systems from Rotobrush and Nikro, and mastic applied by hand to every seam. That labor is the bulk of what you’re paying for.
What Affects Duct Repair & Sealing Pricing in Sandy Springs
- Duct accessibility. A ranch home off Dalrymple Road with a wide-open crawlspace is a different job from a 1980s split-level off Johnson Ferry where returns are buried behind finished walls. Tight access means more labor hours.
- Number of leaks and disconnections. It’s common to find five to ten small leaks plus one or two full disconnections in Sandy Springs homes that have never had duct service. Each one adds sealing time and material.
- Duct material and condition. Metal ducts can be cleaned and sealed with mastic. But years of Atlanta humidity take a toll on flex duct. If the inner liner is brittle or torn, sealing is a waste of money, and the run should be replaced.
- Home size and duct length. A 1,200-square-foot condo near the Chattahoochee has maybe 150 linear feet of duct. A 4,000-square-foot house in Riverside might have 400 feet or more. Price scales with the feet of duct being sealed.
- Whether insulation is needed. Duct in an unconditioned attic should carry R-6 or R-8 insulation. If it’s missing or compressed, wrapping adds $2 to $4 per linear foot to the job.
- Evidence of moisture or mold. If leaking ducts have been pulling humid air into a cool attic space, you may have staining or mold on the ducts or nearby framing. That has to be addressed before sealing, which adds cost.
One note from the field: in Sandy Springs, we regularly see spring failures where flex duct separates at the takeoff collar because the original install used cheap zip ties instead of proper clamps. The fix is simple and cheap, but it has to be found first. A free visual inspection finds these fast.
How to Save on Duct Repair & Sealing
Duct sealing is one of those jobs where the cheapest bid is usually the most expensive one you’ll ever take. Here’s how to save money without cutting corners:
- Bundle sealing with a duct cleaning. If your ducts have years of dust and debris in them, cleaning first gives the mastic a clean surface to bond to. Hollis runs Rotobrush rotary brush systems and Nikro negative-air machines so the duct interior is clean before sealing. Combining both services in one visit costs less than booking them separately.
- Get the inspection before you commit. A visual inspection tells you whether you need $300 worth of sealing or $2,500 worth of Aeroseal. You shouldn’t pay for what you don’t need. Hollis offers free estimates, and the diagnostic is straightforward.
- Seal what’s accessible. If a chunk of your ductwork is buried in finished ceilings, hand-sealing what’s reachable can capture most of the savings at a fraction of the cost of full Aeroseal injection. Ask the technician which runs are leaking the most before you decide.
- Don’t wait until the leak becomes a failure. A small separation at a supply box is a $150 fix. Let it go for two summers in Sandy Springs humidity and you’re looking at mold remediation, insulation replacement, or a collapsed duct run. Early repair is always cheaper.
Want a number before you commit to anything? Call (229) 489-7780. You’ll get a written quote and a straight answer.
What The 365-Day Done Right Promise Covers
Every duct repair and sealing job from Hollis Air Duct Sandy Springs carries the 365-Day Done Right Promise. Here’s what that means in plain terms: if any sealed joint or repaired section fails within one year of the work, we come back and fix it at no charge. Not a discounted visit. Not a service fee. Zero. And the second visit is included as part of the promise, not negotiated after the fact.
This is part of The Garrison Code, the standard that governs how every Hollis technician works: arrive inside the quoted window, price in writing before any work starts, complete the job by the book, and leave the site clean. No subcontractors. No day labor. Background-checked, uniformed technicians on every job.
Signs You Need Duct Repair or Sealing in Sandy Springs
Not every duct problem announces itself with a collapsed vent. Here’s what Sandy Springs homeowners notice before they figure out the ducts are the problem:
- Rooms that never hold the right temperature. The thermostat says 72. The back bedroom says 80. When supply runs leak, conditioned air never reaches the rooms at the end of the line.
- Dust that comes back within days. Leaky return ducts pull air from attics and crawlspaces, and that air carries insulation fibers, dust, and whatever else is up there. You vacuum on Sunday, and the flat surfaces are coated by Thursday.
- Higher power bills than your neighbors. A Sandy Springs home with 20 percent duct leakage loses roughly one dollar out of every five you spend on heating and cooling. The utility bill is where the leak shows up first.
- Musty or stale smells when the system runs. Humid Georgia air pulled into a cool duct interior condenses and feeds mold and mildew. That smell is what the air coming out of your vents is carrying.
- Whistling or hissing near vents and returns. Air escaping through a gap makes noise. It’s most audible in attics and basements near duct junctions.
If any of that sounds familiar, the fix is usually less expensive than continuing to pay the utility bill. And the quote is free. Call (229) 489-7780 to schedule a visual inspection.
Duct Sealing Methods and What They Cost
There are three common approaches to duct sealing, and the price difference between them matters. Here’s what each one costs in Sandy Springs and when it makes sense.
Hand Sealing with Mastic
Mastic is a thick, paste-like sealant applied by brush to every seam, joint, and takeoff collar. It dries into a flexible, airtight seal that lasts decades. Hand sealing costs $300 to $1,200 depending on how much of the ductwork is accessible. It’s the right choice when the leaks are in an open attic or crawlspace. This is the most common job we do in Sandy Springs.
Aeroseal Injection Sealing
Aeroseal is a pressurized sealing system that pumps a mist of sealant particles through the entire duct system. The particles accumulate at the leaks and seal them from the inside. It’s the right tool when ducts run through finished walls and ceilings that can’t be opened up. Aeroseal in Sandy Springs runs $1,500 to $2,500 for a whole-home application. It’s more expensive than hand sealing, but it reaches every leak, not just the ones you can see.
Foil Tape and Mechanical Fastening
For small separated joints and loose takeoffs, the fix can be as simple as re-seating the duct, adding a proper clamp, and sealing the seam with foil tape. This is the cheapest repair, usually $150 to $400 for a single run. But foil tape is not a substitute for mastic on a leaky system, and no reputable company sells it as one.
We use the same professional-grade equipment and materials across every method. That includes Rotobrush rotary brush systems, Nikro negative-air machines, and filtration products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman. The tools are commercial grade, and they’re explained in plain terms on every job.
Cost to Repair vs. Replace Ductwork in Sandy Springs
Homeowners often ask whether it’s cheaper to repair or replace. The answer is usually repair, but not always.
If your ductwork is metal and in structurally sound shape, sealing and spot repairs are almost always the right call. The cost lands between $450 and $1,200, and the system will perform for another 15 to 20 years with proper maintenance. If the ducts are flex duct that’s 20-plus years old, brittle, torn in multiple places, and the liner is deteriorating from years of Sandy Springs humidity, replacement becomes the better investment. Full replacement runs $2,500 to $6,000 and gives you a clean, properly sealed, properly insulated system that will outlast your HVAC equipment.
Here’s the rule of thumb we give Sandy Springs homeowners: if repair costs are under 50 percent of replacement cost and the duct material still has life in it, repair it. If repair costs exceed half the price of new ductwork or the material is failing in multiple places, replace it. And if a technician recommends replacement without showing you the failed sections, get a second opinion.
Duct Repair & Sealing for Sandy Springs Homes: What We See by Area
Home construction varies by neighborhood, and that affects the typical duct job.
Riverside and the Heards Ferry area: Many homes here were built in the 1960s and 1970s. Metal ducts are common, and the issues tend to be leaking seams and disconnected takeoffs rather than material failure. Hand sealing with mastic works well, and costs land in the $500 to $900 range for most houses.
Dunwoody Panhandle and the Perimeter: More recent construction, often with flex duct in attics. We find disconnected runs, crushed sections, and poor original installation. Repairs run $400 to $1,200 depending on how many runs are affected.
Houses along the Chattahoochee corridor: Crawlspaces and basements are more common here, and the humidity is a real factor. Ducts in crawlspaces pull moisture from the ground, and sealing has to be coupled with proper support and drainage checks. Expect to pay on the higher end, $800 to $1,500, because the environment is harder to work in.
No matter the neighborhood, the process is the same: inspect, quote in writing, do the work by the book, and leave the site clean. Roy Castellanos leads the Hollis team in Sandy Springs and stands behind every job with the 365-Day Done Right Promise.
Key Takeaways on Duct Repair & Sealing Costs in Sandy Springs
- Most Sandy Springs homeowners pay $650 to $1,200 for complete duct sealing on a 2,000-square-foot home.
- Basic sealing of accessible ductwork starts at $300. Aeroseal injection for hard-to-reach ducts runs $1,500 to $2,500.
- Common culprits in Sandy Springs: separated flex duct at takeoff collars, leaking metal seams in older Riverside homes, and moisture problems in Chattahoochee crawlspaces.
- The price you’re quoted by Hollis Air Duct Sandy Springs is written down before work starts and does not change at the door.
- Every job carries a 365-Day Done Right Promise. If it fails within a year, we return and fix it at no charge.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in Sandy Springs?
Duct sealing in Sandy Springs costs $450 to $1,850 for most homes, with basic accessible-duct sealing starting around $300 and full Aeroseal injection running up to $2,500 on larger properties. The average homeowner pays about $850. Call (229) 489-7780 for an exact quote, free of charge.
Is it cheaper to repair or replace ductwork?
Repair is cheaper when the duct material is sound. Metal ducts with leaking seams and separated joints cost $450 to $1,200 to seal and will perform for another 15 to 20 years. Replacement at $2,500 to $6,000 makes sense when flex duct is brittle, torn in multiple places, or over 20 years old. The tipping point is roughly 50 percent of replacement cost.
How long does duct sealing take?
Hand sealing on an accessible attic or crawlspace duct system takes one working day for most Sandy Springs homes. Aeroseal injection takes four to eight hours depending on system size and leak volume, and you’ll have your home’s HVAC system back the same day. We schedule inside a quoted window and arrive on time.
Does duct sealing actually lower energy bills?
Yes. The Department of Energy estimates the typical home loses 20 to 30 percent of conditioned air through duct leaks before it reaches the rooms. Sealing those leaks in a Sandy Springs home corrects that waste directly, and many homeowners see the difference on their next full billing cycle, especially in July and August when the AC runs hardest.
How much does it cost to fix a disconnected duct?
Fixing a single disconnected duct run in Sandy Springs typically costs $150 to $400, which covers re-seating the duct, installing a proper clamp, and sealing the seam with foil tape or mastic. If the disconnection caused damage to the flex duct liner, the run may need replacement instead. Call (229) 489-7780 and we’ll tell you what you’re dealing with before any work starts.
Contact Hollis Air Duct Sandy Springs for a Free Estimate
Duct repair and sealing is not a luxury in Sandy Springs. It’s the difference between paying to cool your living room and paying to cool your attic. If you suspect leaks, want a second opinion, or just want to know what the job would cost, call (229) 489-7780. You’ll speak to a live person, get a straight answer, and receive a written price before any work begins. That’s the Garrison Standard, and it’s been the way Roy Castellanos and the Hollis team have worked since 2004.
Pricing reflects the Sandy Springs market as of 2026. Hollis Air Duct Sandy Springs offers free estimates – call (229) 489-7780. This guide was written by Roy Castellanos, owner of Hollis Air Duct Sandy Springs, serving the Sandy Springs area since 2004 as part of the Garrison Partners family. For more on our approach, visit our home page.
What Our Customers Say
"Crew arrived in uniform at the exact time promised. Covered the floors, cleaned all the supply and return vents, and brushed out the main trunk. Vet-owned, and it shows in the discipline."
- Duane S."Dryer vent was packed with lint and took two hours to dry a load. Cleaned it out from the roof cap down. One cycle again."
- Paula Q."They checked each section with a camera and showed me the dust before and after. Thorough and honest."
- Nicole H.