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 Sealing Across Riverdale
We seal ducts in Riverdale’s older ranches off GA-85, its 2000s townhomes near Forest Parkway, and the split-levels scattered between. Most calls come from homeowners who’ve already paid for duct cleaning and still have hot rooms, high power bills, or dust that won’t quit. That’s usually not a dirty duct problem. It’s a leaky, crushed, or poorly designed duct problem. Our Duct Sealing team runs camera inspections before we quote, so we can show you exactly where the air is escaping and what it’ll take to fix it. Dispatch and scheduling are coordinated from our Atlanta office, but our crews live and work in this area. We know the difference between a 1967 ranch with floor-furnace-era returns and a 2005 townhome with flex duct in the attic. Call (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Riverdale’s Preferred Duct Sealing Company
Hollis has been part of the Garrison Partners family since 2004. We operate under The Garrison Standard: written prices, written guarantees, and a 365-Day Done Right Promise on every job. In Riverdale, that matters because too many homeowners have already been burned by a low quote that doubled once the van was in the driveway.
Our technicians are background-checked and uniformed. You get a name and photo before anyone knocks. The price we write down before work starts is the price you pay. If the seal fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.
Phones are answered by a live person 24 hours a day, 7 days a week. Not a callback queue. Not “leave a message and we’ll get back to you Monday.” A real person who can book your Riverdale appointment or answer questions about what we found on your last visit.
HVAC Duct Sealing in Riverdale
HVAC Duct Sealing in Riverdale is rarely about slapping mastic on a few joints and calling it done. In the older neighborhoods along the GA-85 corridor, many 1960s – 70s ranches have duct systems originally laid out for floor furnaces and later adapted to central air, leaving undersized return ducts that no amount of cleaning can fix. Sealing and resizing those return runs is often the only way to balance airflow. We use professional-grade mastic and fiberglass mesh, applied to accessible joints and seams after a camera inspection confirms what we’re actually dealing with. A typical HVAC duct sealing job in Riverdale runs $450 – $1,200 depending on system size, accessibility, and whether we’re resizing returns or just sealing accessible leaks. Whole-system sealing on larger homes with multiple zones can reach $1,800 – $2,400.
Return Duct Resizing
Undersized returns choke your air handler and create negative pressure that pulls attic dust and humidity into the system. We measure static pressure, calculate proper return sizing for your equipment, and rebuild or extend the trunk when needed. This is common in Riverdale’s older ranches where a 3-ton unit was bolted onto ductwork designed for a floor furnace.
Mastic Sealing vs. Tape
Foil tape fails in Riverdale’s hot attics within a few years. We use water-based duct mastic rated for high humidity, reinforced with mesh on larger gaps. It stays flexible, won’t off-gas, and lasts the life of the ductwork when applied to clean, dry surfaces.
Duct Repair in Riverdale
Duct Repair in Riverdale often starts with a crushed flex run in the attic or a disconnected joint buried under blown insulation. On a split-level ranch off GA-85, our tech pulled a crushed flex run in the attic and found the return trunk sized for the original floor furnace, not the 3-ton air handler bolted on decades later. After a camera inspection confirmed the crushed section and two disconnected joints, we sealed the trunk with mastic and mesh, reconnected the run, and the homeowner immediately noticed even airflow upstairs for the first time in years. We don’t seal over damage. We repair or replace the damaged section, then seal the system as a whole. Typical duct repair in Riverdale runs $280 – $650 for single-run replacement and reconnection; more extensive rebuilds of return trunks or multiple crushed runs range $800 – $1,500.
Flex Duct Replacement
Flex duct in Riverdale attics gets crushed under insulation, chewed at the joints by rodents, or kinked during filter changes. We replace damaged runs with properly supported, insulated flex duct, sealed at both ends with mastic and mechanical fasteners. No zip ties and tape.
Trunk Line Repair
Metal trunk lines in older Riverdale homes corrode at the seams or separate where supports have failed. We rebuild sections with galvanized duct, seal with mastic, and add proper hangers so the repair lasts.
Trusted Brands We Service in Riverdale
We carry filtration and sealing products from Aprilaire, Abatement Technologies, and Guardsman. Our equipment roster includes Rotobrush rotary brush systems for pre-sealing cleaning and Nikro negative-air machines for containment during repair work. For Riverdale customers, this means we don’t wait on parts shipped from out of state. If your system needs a specific collar, damper, or filtration upgrade alongside sealing work, we stock it or source it quickly through our Atlanta supply chain. Fast turnaround matters when your AC is running 10 months a year.
Common Duct Sealing Problems We See in Riverdale Homes
- Floor-furnace returns choking modern equipment. In the GA-85 corridor ranches, we regularly find 10-inch return trunks feeding 3-ton air handlers that need 16 inches minimum. The system runs constantly, rooms stay uneven, and the homeowner pays for duct cleaning that can’t fix a sizing problem.
- Crushed flex duct trapping debris. Riverdale’s humid summers and heavy pollen load drive mold and fine clay dust into return ducts. Sealing over a contaminated run locks that debris inside the system instead of removing it. We clean first, then seal.
- Disconnected joints hidden under attic insulation. Original 1960s – 70s ductwork adapted from floor-furnace layouts leaves undersized returns; sealing leaky joints without resizing them just moves the imbalance around the house. We find these with camera inspection before we quote.
- Rodent damage at flex duct connections. Flex duct runs in Riverdale attics get crushed under insulation and rodent-chewed at the joints. Sealing a crushed or disconnected run without repairing it first traps the problem in place. We replace the damaged section, then seal the system.
Pricing for Duct Sealing in Riverdale, GA
A typical duct sealing job in Riverdale runs $450 – $1,200 for single-system homes with accessible ductwork. Whole-system sealing on larger homes or those with multiple zones runs $1,800 – $2,400. Duct repair, including crushed flex replacement and trunk rebuilds, typically falls between $280 – $1,500 depending on material and labor. What moves the price: attic accessibility, whether we need to remove and replace insulation to reach the ductwork, the extent of resizing needed for undersized returns, and whether we find contamination that requires cleaning before sealing. We write the price down before any work starts. One flat price per system. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for an exact quote. Estimates are free.
We Also Serve Cities Near Riverdale
Our crews work throughout south metro Atlanta. We also handle Duct Sealing in Riverdale neighboring communities including Forest Park, Morrow, Conley, and Union City. Same standards, same written pricing, same 365-Day Done Right Promise.
Serving Riverdale, GA - Our Local Coverage Area
We’re based in the Riverdale 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 Riverdale
Sealing alone probably won’t fix it. In Riverdale’s older ranches, the real problem is usually undersized return ducts originally designed for floor furnaces, not central air. We measure static pressure and often need to resize the return trunk before sealing will balance airflow. Call (361) 326-5060 and we’ll camera-inspect to confirm what’s actually wrong.
Crushed flex duct needs replacement, not sealing. Sealing a kinked or collapsed run traps the restriction in place and can increase pressure on the rest of the system. We replace damaged flex with properly supported new runs, then seal the connections. Call (361) 326-5060 for an exact quote.
Riverdale’s Georgia red clay generates fine dust that enters through leaky return ducts, and spring pollen loads are intense. Sealing over contaminated ductwork locks that debris inside. We clean the system with Rotobrush rotary equipment and negative-air containment before we seal, so you’re not trapping problems inside. Call (361) 326-5060 to schedule.
We start with a camera inspection of accessible ductwork, measure airflow at each vent, and check static pressure across the system. Then we write down exactly what we’ll seal, resize, or replace, and what it costs. Once you approve, we clean if needed, apply mastic and mesh to leaks, replace damaged sections, and test again to confirm improved airflow. Call (361) 326-5060 to book.
It’s worth it on both, but for different reasons. Older ranches usually need return resizing and crushed flex repair. Townhomes from the 2000s tend to have better-designed ductwork but often develop leaks at joint connections and poorly sealed boots where ducts meet drywall. Sealing those leaks typically runs $450 – $850 and pays back in comfort and efficiency within a season or two. Call (361) 326-5060 for an exact quote.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Riverdale and south metro Atlanta since 2004.