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 Milton
Duct sealing in Milton typically runs $850 to $2,400 for a whole-home job on a standard custom build, and the work is scheduled in advance with a written price confirmed before our truck pulls up. The range reflects what we actually see here: homes off Redd Road, Hopewell Road, and Birmingham Highway run larger than nearby cities, with multiple HVAC zones and long duct runs that demand more mastic, more tape, and more labor hours than a 2,000-square-foot production home over in Alpharetta. We’re the Duct Sealing crew that works Milton weekly, not a rotating crew from across the metro. Call (762) 769-7145 and a live person answers, day or night.
Why Hollis Air Duct Alpharetta Is Milton’s Preferred Duct Sealing Company
Milton homeowners tend to ask harder questions than most, and that’s fair. A house with three HVAC zones, a finished basement, and a vented crawlspace isn’t a one-size-fits-all job. Our technicians know what a 1998 custom estate off Freemanville Road looks like inside the ductwork, because they’ve worked those systems. We don’t quote over the phone blind; we assess the actual duct layout, the access points, and the condition of existing tape and mastic before we give you a price. That price goes in writing and it doesn’t move at the door.
The Garrison Standard governs how our crews behave on every Milton job: arrive inside the quoted window, price in writing before work begins, complete the job by the book, and leave the site clean. Background-checked, uniformed technicians show up with commercial equipment from Abatement Technologies and Rotobrush, plus filtration products from Honeywell and Aprilaire. Every duct sealing job carries the 365-Day Done Right Promise: if the work fails within a year, we return at no charge, including a free second visit. In writing, every time.
Scheduling is coordinated from our Atlanta office, but the crews who serve Milton are dispatched locally and know the neighborhoods. Crabapple, Birmingham, the estates along Birmingham Road – we’re in those areas regularly. When you call (762) 769-7145, you’re not routed through some national call center. You get a live person who can book the visit and answer questions about what we’ll actually do.
Styles & brands we work with
Duct Insulation in Milton
Duct Insulation in Milton homes matters because a large share of your ductwork runs through unconditioned spaces: vented crawlspaces along Birmingham Highway, attics over high-ceiling living rooms, and chase walls in finished basements. Uninsulated or poorly insulated ducts in those spaces lose conditioned air before it reaches the register. In Milton’s humid summers, that temperature difference also creates condensation on the duct surface, which soaks into fiberglass insulation and degrades it over time. We see this constantly in homes from the 1990s and 2000s where original duct wrap has compressed, torn, or fallen away entirely at the joints.
A typical whole-home duct insulation job in Milton runs $1,200 to $3,400, depending on linear footage and access difficulty. Long runs through finished basement ceilings cost more because we’re working around finished surfaces. We stock R-8 and R-6 duct wrap, and the written estimate you receive before work starts covers the exact scope, no surprise line items after we’re inside.
Attic and Crawlspace Insulation
Ducts in Milton attics and crawlspaces face the widest temperature swings in the house. We inspect insulation integrity, re-wrap sagging sections, and seal every seam before insulation goes on. A duct that’s sealed but uninsulated still wastes energy and sweats in summer.
Register Boot Insulation
The boot where ducts meet the floor or wall is a frequent weak point. When boots aren’t insulated behind drywall, you get cold spots in winter and warm drafts near registers in summer. We address boots during every Milton insulation job and document what we found with photos.
HVAC Duct Sealing in Milton
HVAC Duct Sealing in Milton homes is a different scope of work than what a production suburban house needs. The custom homes here average 3,000 to 6,000 square feet with long, multi-branch duct systems, and the older ones – especially those built in the late 90s and early 2000s – often have original flex duct that’s begun to sag, split, or pull away from the plenum. In Milton’s humid subtropical climate, the gaps that let conditioned air escape into crawlspaces and attics also pull in pollen, red clay dust, and humid outside air every time the system cycles. Sealing those leaks is what stops the cycle.
A comprehensive duct sealing job on a Milton home typically runs $850 to $2,400. The cost depends on duct length, number of zones, and whether we’re sealing accessible basement and crawlspace runs only or also addressing ducts inside finished ceilings. We use mastic and foil tape, applied per industry standard, and we test our work with a duct leakage measurement before we leave. You get before-and-after documentation, not just a verbal “it’s done.”
Supply and Return Sealing
Leaky supply ducts push conditioned air into spaces you don’t live in. Leaky return ducts pull crawlspace air into the air you breathe. In Milton, return-side sealing often matters more, because vented crawlspaces are common and return plenums are frequently unsealed. We seal both sides on every job.
Plenum and Trunk Line Sealing
The plenum – the box where ducts connect to the air handler – is the highest-pressure point in your system and the most common leak site we find in Milton. We remove, clean, and reseal plenum connections with mastic, then verify the seal before reconnecting trunk lines. On zoned systems, we check each zone damper for leakage too.
Trusted Brands We Service in Milton
We work on all duct systems, regardless of brand, and we stock common sealing materials and replacement parts our Milton customers need: mastic, foil tape, flex duct, and duct wrap for standard residential applications. Our equipment roster includes commercial-grade negative-air machines from Abatement Technologies and filtration products from Honeywell and Aprilaire. Those aren’t hardware store tools. They’re what allow us to create proper negative pressure while we work, so dust and debris from your ductwork don’t spread through the house during a sealing job. For Milton homeowners, that means the work gets done with the same discipline the commercial side of the trade expects.
Common Duct Sealing Problems We See in Milton Homes
- Red clay dust intrusion in return plenums: In Crabapple and Birmingham homes with vented crawlspaces, unsealed return ducts pull in fine red clay dust plus whatever else lives in the crawlspace. Sealing the return side shuts that pathway down.
- Mastic cracks on long crawlspace runs: Red clay soil in Milton shifts seasonally with moisture cycles, and that movement cracks rigid mastic seals over time. Homes on long crawlspace runs often need re-sealing within a few years.
- Peeling foil tape near unconditioned attics: High summer humidity in Milton causes foil tape on ductboard to peel away, particularly in zones that run through hot attics above high-ceiling living rooms. We replace failing tape with fresh mastic and tape applied to clean surfaces.
- Hidden rodent damage in finished basement ceilings: Flex duct inside finished basement ceilings is a favorite nesting site. If you’re sealing accessible joints only, up to 40% of bypass air stays unaddressed. We inspect and document what’s reachable, and we tell you plainly if we can’t get to a section.
See the difference
Before
After
Before
After
Before
AfterPricing for Duct Sealing in Milton, GA
Whole-home duct sealing in Milton runs $850 to $2,400. A smaller rancher on a slab is at the low end. A three-zone custom estate with a finished basement and vented crawlspace is at the high end. What drives the range: total linear feet of duct, number of zones, access difficulty, and whether we’re sealing just the accessible runs or also insulating. When a Milton home has three systems, we price per system, and every system’s price is written down before we start. No per-vent games. No lowball coupon that turns into a four-figure invoice. You get one flat price per system, agreed before work begins. Call (762) 769-7145 for a free estimate. Roy Castellanos and the team will walk you through exactly what we’d do and what it costs.
We Also Serve Cities Near Milton
Our crews work Milton every week, and we also cover the surrounding area: Alpharetta, Cumming, Suwanee, and Canton. If you’re in one of those cities, the same written pricing and 365-Day Done Right Promise apply. Schedule through the same number and you’ll get the same live-person answer. Whether you’re in Milton proper or just across the line, we’ll bring the same standard to your home.
Serving Milton, GA - Our Local Coverage Area
We’re based in the Milton 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 Milton
Pollen season in Milton loads duct interiors with fine allergenic particles, especially from the oak and pine trees that surround larger lots. Sealing reduces how much outside air and pollen enters the ducts in the first place; cleaning removes what’s already inside. If you only clean and don’t seal, pollen keeps re-entering through leaks every season. For a Milton homeowner, the two jobs work together. Call (762) 769-7145 and we’ll tell you which one actually addresses what you’re seeing on your registers.
Yes, if the dust is entering through leaky return ducts or gaps in the system. Red clay dust on supply registers usually means the return side is pulling crawlspace air into the blower, which then pushes it through every vent. Sealing the return side in a vented crawlspace stops that. We see this exact condition regularly in Crabapple and Birmingham homes. The fix is sealing, not just cleaning, and we can show you photos of what we sealed.
We seal every accessible connection first – plenum, trunk line takeoffs, zone dampers, and any exposed duct in attic or crawlspace. For ducts hidden inside finished basement ceilings, we assess what’s reachable and document it clearly. In some Milton homes, we can access those runs through existing can light openings or register boots; in others, we’ll tell you plainly that a section is inaccessible and what that means for your air balance. The written estimate reflects the actual scope. No vague promises.
In a large home, yes. A duct system on a 4,000-square-foot house can easily leak 20% to 30% of its airflow into unconditioned spaces. Sealing those leaks returns that air to the rooms you’re actually trying to heat and cool. You’ll notice the difference most in the farthest rooms from the air handler, which in Milton custom homes are often the upstairs bedrooms. It’s not a comfort placebo; it’s recovered conditioned air that was leaving the building.
Sealing ducts in a humid climate isn’t risky if the work is done correctly. What causes mold is moisture, and in Milton the moisture comes from two sources: condensation from temperature differences on uninsulated ducts, and humid crawlspace air pulled into leaky returns. Sealing eliminates the second source. Insulating eliminates the first. Done together, they reduce mold risk rather than increase it. We use materials rated for HVAC applications and we inspect for existing moisture issues before we seal.
Call Hollis Air Duct Alpharetta for Duct Sealing in Milton
If you live in Milton, you already know the houses here are different. Bigger lots, older custom builds, multiple systems, and a climate that tests every component. We handle those systems the right way: written price before we start, professional-grade equipment, documentation of what we found and what we sealed, and a 365-Day Done Right Promise that says if it fails, we come back at no charge. No pressure, no moving targets. Call (762) 769-7145 now to schedule your free estimate. You’ll talk to a live person, and you’ll know exactly what the job costs before any work begins.
Written by Roy Castellanos, Owner at Hollis Air Duct Alpharetta, serving Milton since 2004.