Duct Sealing in South Fulton - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across South Fulton

Duct sealing in South Fulton typically runs $350 – $850 for a whole-home seal, depending on whether we’re patching a few joints or reconnecting runs that have pulled apart in your attic. Most jobs take three to five hours, and we write the price down before we touch anything. Call (361) 326-5060 for a free estimate.

Call (361) 326-5060

We serve South Fulton from our Atlanta dispatch office, and our crews know the area well. We’ve sealed ducts in Wolf Creek, Sandtown, and the older ranch pockets near the Fulton County line. That matters because a two-story off Cascade Road with flex duct in a 130°F attic needs a different approach than a 1970s ranch with original sheet metal. We don’t guess. We inspect first, price second, seal third.

New construction dominates South Fulton. The city incorporated in 2017 and has been growing fast ever since. But here’s what we’ve learned: builder-grade flex duct runs through unconditioned attics that regularly exceed 130°F in summer, and the heat accelerates joint separation and sagging. A duct-sealing job on a 5-year-old Wolf Creek or Sandtown home is often about reconnecting and sealing seams the builder left unsealed at handover, not repairing the HVAC equipment itself. That’s a handover problem unique to hot-attic, flex-duct subdivisions here, not an emergency-service story.

Why Hollis Air Duct Cleaning Is South Fulton’s Preferred Duct Sealing Company

Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. We’re not a franchise playbook operation. Each location runs independently under The Garrison Standard, which means we arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. Roy Castellanos leads our operation, and our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive.

Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday. When you call (361) 326-5060, you talk to a human who can schedule your South Fulton appointment and explain what duct sealing will involve for your specific house.

Every job carries our 365-Day Done Right Promise in writing. If the seal fails within a year, we come back and make it right at no charge, including a free second visit. We don’t negotiate this. It’s printed on every invoice.

We use professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration products from Honeywell and Aprilaire. These are the same tools commercial crews use, not hardware-store gear. We explain what each piece does and why it matters for the air moving through your home.

Duct Insulation in South Fulton

Duct Insulation in South Fulton is often the missing piece in homes where the ducts are sealed but the attic still wins. In our climate, flex duct runs through 130°F+ attic space lose conditioned air through the insulation jacket itself, not just at the joints. We see this constantly in newer subdivisions where the builder met code minimum but didn’t account for our summer heat load.

A typical duct insulation job in South Fulton runs $400 – $950, depending on linear footage and whether we’re wrapping existing runs or replacing degraded flex duct entirely. We inspect with a camera first, measure the actual temperature differential, then write the price down before we start.

When Insulation Fails Before the Ducts Do

The fiberglass insulation jacket on builder-grade flex duct compresses and separates where it contacts trusses or where crews stepped on it during construction. The duct underneath may be intact, but you’re now cooling your attic. We wrap with new insulation or replace the run entirely, depending on what the camera shows.

Vapor Barriers for Humid Attics

South Fulton’s humid subtropical climate means attic moisture migrates through porous insulation. We install proper vapor-barrier wrapping on re-insulated runs to stop condensation from forming on the duct exterior and feeding mildew growth inside the insulation batts.

HVAC Duct Sealing in South Fulton

HVAC Duct Sealing in South Fulton starts with understanding what kind of system you’re living with. Most homes here use flexible insulated ductwork in unconditioned attics, with multiple returns and a central air handler. The seals that matter are at the plenum, at every branch takeoff, and where flex connects to hard pipe or boots. We were called to a four-year-old house off Sandtown Road where the upstairs never held temperature and the homeowner could see dust puffing from two ceiling registers. A camera inspection showed three disconnected flex runs in the attic and drywall debris still sitting in the supply and return ducts from construction. We pulled the system under negative pressure, ran agitation tools through the runs, then sealed and reconnected the joints with mastic and foil tape. The static pressure dropped and the upstairs finally cooled evenly.

Typical HVAC duct sealing in South Fulton costs $350 – $850. A simple seal of accessible joints at the plenum and boots falls at the lower end. Reconnecting multiple separated runs, cleaning construction debris, and rebalancing airflow pushes toward the higher end. We write the exact price after inspection, before any work begins.

Mastic vs. Foil Tape

We seal joints with duct mastic, a thick paste that remains flexible and won’t loosen as attic heat cycles the adhesive. Foil tape reinforces the seal at high-stress connections. Tape alone fails in South Fulton attics. We don’t use it as primary sealant.

Negative Pressure Testing

After sealing, we test with a manometer to confirm static pressure readings within manufacturer spec. This proves the seal worked before we leave. You get the before and after numbers in writing.

Trusted Brands We Service in South Fulton

We stock parts and filtration products from Honeywell, Aprilaire, and Abatement Technologies for South Fulton customers, which means faster turnaround on jobs that need replacement components. Honeywell media filters and Aprilaire whole-house filtration integrate directly with the systems we seal, so you’re not waiting on a parts order from Atlanta while your attic leaks conditioned air. Abatement Technologies HEPA-negative-air machines are what we use to contain debris during duct cleaning and sealing in occupied homes. We don’t show up hoping we have what you need. We know the housing stock here, we know the equipment, and we carry what the job demands.

Common Duct Sealing Problems We See in South Fulton Homes

• Builder-grade flex duct joints taped at handover loosen as 130°F+ attic heat cycles the adhesive, opening leaks before the home is five years old. We reseal with mastic and mechanical fasteners that survive our summer heat cycles.
• Construction dust and drywall debris left in supply and return ducts at closing clogs the blower motor and gets pushed through the house every time the system runs. This is especially common in Wolf Creek and Sandtown new builds. We clean before we seal, or we’re sealing debris inside your system.
• Attic humidity plus pine pollen drawn into returns each March-April feeds mildew growth inside insulated flex runs that a simple filter change cannot stop. Sealing the return path properly reduces infiltration, but we also inspect for existing growth and recommend remediation before sealing contaminated ductwork.
• A duct sealing job done without a camera inspection or negative pressure misses disconnected runs hidden behind insulation batts. We camera every accessible run. A disconnected duct blowing into your attic insulation costs you money every minute the system runs, and you’d never know without looking.

Pricing for Duct Sealing in South Fulton, GA

We Also Serve Cities Near South Fulton

Our crews work throughout metro Atlanta, including South Fulton and nearby Atlanta, Sandy Springs, Roswell, and Johns Creek. Dispatch and scheduling are coordinated from our Atlanta office, and we route crews daily to keep response times reasonable across the metro. Whether you’re in a new Sandtown subdivision or an older home near the Fulton County line, our Duct Sealing team can get to you.

FAQs About Duct Sealing in South Fulton