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 Doraville
If your Doraville home still runs on original 1960s ductwork, the air you paid to condition is escaping before it reaches your living room. Duct sealing in Doraville typically runs $850 – $2,400 for a full system depending on home size and access, and it’s the single most effective fix for rooms that never quite cool down in July. Our Duct Sealing team has worked in ranch homes off Buford Highway, split-levels near Honeysuckle Park, and 1980s condos off Shallowford Road. We know exactly how Doraville’s heat and humidity punish old metal ducts. Call (762) 769-7145 and we’ll give you a written price before any work starts.
Why Hollis Air Duct Alpharetta Is Doraville’s Preferred Duct Sealing Company
Doraville homeowners have a specific problem set. The housing stock leans heavily toward mid-century construction, which means galvanized steel ducts that have been expanding and contracting through 60 Georgia summers. Most of the homes we seal in Doraville are ranches and split-levels built between 1955 and 1975. That matters because sealing a 1964 ranch requires a different hand than sealing a 2015 build in a newer suburb. Roy Castellanos, who leads our team, has spent years reading the failure patterns in exactly these homes. We arrive with the right mastic, mesh, and camera equipment to diagnose before we touch anything.
Word gets around in Doraville. Homeowners near Northwoods and Oakcliff talk, and when one neighbor fixes a persistent hot bedroom by sealing the duct runs, the next neighbor calls us. Our technicians are background-checked and uniformed. You’ll know who’s walking in before they arrive. Phones are answered by a live person around the clock, not a voicemail loop. And every estimate we write gets handed to you before a single tool comes off the van.
We’re not a franchise pretending to be local. Hollis Air Duct Alpharetta is part of the Garrison Partners family, independently owned and operated under The Garrison Standard: arrive inside the window we quoted, price it in writing before work starts, do the job by the book, and leave the site clean. In Doraville, that standard is written into every invoice.
Styles & brands we work with
HVAC Duct Sealing in Doraville
HVAC Duct Sealing in Doraville means finding and closing every leak in the system that carries conditioned air from your furnace or air handler to each room. In a typical Doraville ranch, that means crawling into an attic that hits 130°F in August, inspecting galvanized steel runs, and sealing seams, elbows, and take-off collars with fiber-reinforced mastic. The goal is simple: keep the air you paid to cool inside the ducts, not leaking into the attic or pulling unfiltered air from the crawlspace. A full sealing job in Doraville usually lands between $850 and $2,400. Smaller repairs, like resealing a single supply branch, run $250 – $500.
Sealing the Supply Side
Supply ducts carry conditioned air from the air handler to your registers. In Doraville’s 1960s ranches, these runs are often original galvanized steel with joints that have loosened over decades. We seal every seam with mastic, not tape. Mastic is a thick paste that hardens into a permanent, airtight bond. Duct tape, by contrast, dries out and peels in attic heat. That’s why we never use it.
Sealing the Return Side
Return ducts pull air from your home back to the HVAC system to be filtered and cooled again. When returns leak in a Doraville crawlspace or attic, the system sucks in dust, humidity, and whatever else is floating around up there. That’s how a clean home ends up dusty two days after you vacuum. Sealing the return side stops the negative pressure that pulls contaminants into the air you breathe.
Duct Repair in Doraville
Duct Repair in Doraville goes beyond sealing. When a duct is rusted through, crushed, or torn, you can’t just mastic over it and call it done. In the humid attic spaces of Doraville’s older homes, rust is the enemy. We repair or replace damaged sections, reattach collapsed flex runs, and rebuild connections at the air handler. Depending on severity, duct repair in Doraville typically costs $300 – $900 per damaged section. A full replacement of collapsed flex duct in an attic can run $1,200 – $3,000.
Repairing Rusted Galvanized Steel
Original galvanized steel ducts in 1950s and 60s Doraville homes often rust through at the seams. Georgia humidity settles in hot attics, condensation forms on the metal, and pinholes develop. Those pinholes leak conditioned air into the attic. We cut out the rusted section and splice in clean metal, then seal every connection with mastic and mesh. The repair is permanent, not a patch job.
Replacing Collapsed Flex Duct
We regularly see collapsed flex duct in the 1980s apartment and condo attics near Buford Highway. Poor initial installation, sagging support straps, and rodent damage combine to crush or tear flex runs. When a flex duct collapses, airflow to that room drops to nearly zero. We replace the run with proper straps and sealed connections. The fix restores airflow and lowers the strain on your air handler.
Trusted Brands We Service in Doraville
Most Doraville systems we work on are matched with equipment from the same handful of manufacturers, and we stock the parts that keep those systems sealed and moving air. We regularly service and integrate filtration from Honeywell and Aprilaire, and our sealing work is done to the standard those brands require for their systems to hit rated efficiency. We also use professional-grade Abatement Technologies and Guardsman filtration equipment on jobs where air quality is a concern. That means fast turnaround for Doraville customers: we don’t need to order parts from a supplier in Marietta when your Aprilaire filter housing needs a seal. We carry what the job needs on the van.
See the difference
Before
After
Before
After
Before
AfterCommon Duct Sealing Problems We See in Doraville Homes
- Rust-through on original galvanized ducts. Doraville’s humid summers force condensation onto attic ductwork, and 60-year-old galvanized steel eventually rusts through at the seams. Those pinhole leaks dump cooled air into the attic and pull fiberglass insulation particles into the airstream.
- Loose take-off collars on supply branches. In split-level homes throughout Doraville, the collars that connect branch ducts to the main trunk work loose over decades of thermal expansion. Conditioned air escapes into wall cavities, and during spring pollen peaks, outdoor air gets drawn in through the same gaps.
- Collapsed flex duct in 1980s attics. Apartments and condos near Buford Highway built in the 1980s often have original flex duct that has sagged, been chewed by rodents, or torn at the air handler connection. The result is a room that stays hot no matter how low you set the thermostat.
- Mold and mildew inside duct walls. When humid air leaks into ducts and meets cool metal, condensation forms. In Doraville’s climate, that standing moisture breeds mold on duct liner and insulation. Sealing stops the humid air intrusion that feeds the problem. Cleaning alone can’t fix what a leak keeps reintroducing.
Pricing for Duct Sealing in Doraville, GA
Here’s what you can expect to pay in Doraville’s market. A whole-house sealing job for an average 1,500 – 2,200 square foot ranch runs $850 – $1,800. Larger split-levels or homes with extensive attic ductwork run $1,500 – $2,400. If we find damage during inspection, repair work adds $300 – $900 per section. You’ll get the exact number in writing before any work begins. No per-vent pricing, no door knock add-ons. The price we write is the price you pay. Call (762) 769-7145 and we’ll schedule a free inspection and give you a fixed quote.
Every job in Doraville carries the 365-Day Done Right Promise. If a sealed joint fails within a year, we come back and redo it at no charge. That includes a free second visit. It’s not a vague satisfaction claim. It’s a written guarantee on every invoice.
We Also Serve Cities Near Doraville
Hollis Air Duct Alpharetta runs crews throughout the north metro. In addition to our work across Doraville, we seal and repair ducts in Alpharetta, Cumming, Suwanee, and Canton. Scheduling is coordinated from our Atlanta-area dispatch office, and our Doraville crews know these roads well enough to arrive inside the window we quote.
Serving Doraville, GA - Our Local Coverage Area
We’re based in the Doraville 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 Doraville
Every 5 to 7 years is a sound interval for a 1950s or 60s ranch in Doraville. Rust develops slowly, and a seam that was tight five years ago may be pinholes by now. If you haven’t had an inspection in a decade or more, schedule one. Heat and humidity accelerate every failure mode we see. Call (762) 769-7145 and we’ll inspect your system and give you an honest read on its condition.
Yes, significantly. When return ducts leak in an attic or crawlspace, the system draws in unfiltered outside air. During Doraville’s heavy March and April pollen season, that means pollen bypasses your HVAC filter entirely. Sealing the return side restores proper negative pressure so all incoming air passes through the filter. The difference is measurable and noticeable, especially for allergy sufferers.
Usually, yes. Most 1980s apartment and condo systems near Buford Highway have attic or crawlspace duct runs accessible without drywall work. We seal from inside using mastic and mesh applied to accessible joints and seams, or we use an aerosol sealant for hard-to-reach leaks. We’ll tell you exactly what’s accessible and what the options are before we start.
NADCA, the industry association for air duct work, treats sealing and cleaning as complementary steps, not competing ones. In Doraville’s climate, our position is this: seal first, then clean. A clean system with leaky ducts pulls mold and moisture right back in within months. A sealed system stays clean far longer. For Doraville homes with original ductwork, we recommend addressing leaks before any deep cleaning.
Age and construction. Doraville’s housing stock skews toward 1950s – 70s ranches and split-levels with original galvanized steel ducts that have survived 50 to 70 Georgia summers. Brookhaven and Chamblee have more new construction and post-1990 replacement systems. Doraville’s older metal, combined with humid attic conditions and thermal cycling, creates a rust-and-loosening pattern that newer suburbs simply don’t see at the same rate.
Written by Roy Castellanos, Owner at Hollis Air Duct Alpharetta, serving Doraville through the Garrison Partners family since 2004.