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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After
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AfterFast, Reliable Duct Sealing Across Altamonte Springs
We’re the crew Hollis Air Duct Cleaning sends to Altamonte Springs when homeowners call about cold spots, musty vents, or utility bills that climb every summer without explanation. Our technicians know the area from Douglas Avenue to the condo corridors near the Altamonte Mall, and we schedule Altamonte Springs jobs with realistic drive times built in, not promises we can’t keep. If your ducts haven’t been touched since the house was built in the 1970s or 1980s, you’re not alone here. Most of the ranch homes and townhome clusters in Altamonte Springs are running on original flex duct that was never designed for forty-plus years of Central Florida humidity. Call us at (361) 326-5060 and we’ll put a real price in writing before any work starts.
Why Hollis Air Duct Cleaning Is Altamonte Springs’s Preferred Duct Sealing Company
We’ve been working in Altamonte Springs long enough to know which condo complexes have the original metal trunk lines and which neighborhoods built in the 1980s boom used the thinner flex that degrades faster. That matters because sealing ductwork without knowing what you’re sealing, and what condition it’s in, is how moisture gets trapped and mold problems get worse.
Our technicians are background-checked, uniformed, and expected to perform by The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. Every repair we make in Altamonte Springs carries our 365-Day Done Right Promise. If the seal fails, the odor returns, or the pressure readings don’t hold, we come back and make it right at no charge, including a free second visit.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues. Scheduling and dispatch for Altamonte Springs are coordinated from our Miami office, with local crews serving the area directly.
Duct Sealing Services in Altamonte Springs
Duct Sealing Services in Altamonte Springs address a specific problem that worsens with every cooling season: conditioned air escaping through gaps, separations, and degraded joints in ductwork that has been expanding and contracting in Florida heat for decades. We don’t just chase the obvious leaks around registers. Our process starts with a camera inspection to map the full system, including the plenum cabinet and air handler seams that often account for the largest losses in aging 1970s-80s installations.
A typical whole-system duct sealing in Altamonte Springs runs $850 – $1,400 for a single-family ranch or townhome, depending on accessibility and how much of the original duct needs attention. Condo systems near the Altamonte Mall often fall in the $650 – $950 range because the runs are shorter, though the forty-year-old flex in those units frequently requires more delicate handling.
Leak Detection and Mapping
We pressurize the system and use smoke pencils and thermal imaging to find every escape path, not just the ones you can feel with your hand. In Altamonte Springs homes with original flex duct, we often find the trunk-to-branch joints have separated entirely, dumping cooled air into the attic or crawl space.
Mastic Sealing and Joint Reinforcement
We use duct sealing mastic, not tape, on metal connections. Mastic remains flexible as temperatures swing and creates a permanent bond that tape can’t match. For fragile flex near the Altamonte Mall condos, we select sealants rated for high-humidity environments and apply them after source removal, never before.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Duct Insulation in Altamonte Springs
Duct Insulation in Altamonte Springs is often the missing piece after sealing is complete. In this climate, with air conditioning running March through November, uninsulated or poorly insulated ducts sweat. That moisture soaks into surrounding materials, breeds mold, and destroys the seal you just paid for. We see this constantly in the ranch homes off Douglas Avenue and in the older condo conversions where the original insulation blanket has compressed or fallen away entirely.
Duct insulation replacement in Altamonte Springs typically costs $400 – $800 for a standard residential system, added to or following a sealing job. We use professional-grade materials from Abatement Technologies and Guardsman, not hardware-store wrap, because the R-value and vapor barrier performance actually matter when your attic hits 140 degrees in July.
Condensation Control
Proper insulation stops the sweating that leads to musty odors and mold growth. In Altamonte Springs’s humid subtropical climate, this isn’t optional. We’ve returned to homes where another company sealed ducts but skipped reinsulating, and the moisture problem was worse six months later.
Attic and Crawl Space Wrap
Exposed duct runs in vented attics need full wrap with sealed seams. We use foil-faced products with the correct perm rating for Central Florida, installed so the vapor barrier faces the right direction on every run.
Trusted Brands We Service in Altamonte Springs
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation, Nikro negative-air machines for controlled debris removal, and filtration and insulation products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman. We stock common mastics, sealants, and insulation wraps for Altamonte Springs jobs so we’re not waiting on delivery while your system stays open. For the 1970s-era condo complexes near the Altamonte Mall, we carry specialized low-pressure sealants designed for compromised flex duct that can’t tolerate standard products.
Common Duct Sealing Problems We See in Altamonte Springs Homes
- Sealing over wet, moldy flex before source removal. The seal traps moisture and the mildew smell returns within weeks in Altamonte Springs’ year-round humidity. We pull debris first, verify dryness, then seal.
- Ignoring the air handler and plenum cabinet seams while chasing only visible register leaks. In aging 1970s-80s systems, these central connections often represent the largest leak path. We inspect and seal them every time.
- Using the wrong sealant on fragile, decades-old flex near the Altamonte Mall condos. Ducts that were never cleaned often have compromised inner liners. We match the product to the material condition.
- Skipping camera inspection on longer rural-edge service drives and outbuilding systems. Properties near the Seminole County line may have buried flex damage or rodent intrusion that isn’t visible from the access hatch. We check before we quote.
Pricing for Duct Sealing in Altamonte Springs, FL
Whole-system duct sealing in Altamonte Springs runs $850 – $1,400 for most single-family homes, with condo and townhome systems typically $650 – $950. Duct insulation added to the job falls in the $400 – $800 range. What moves the price: how much original duct needs attention, whether we can access all runs from the attic or need to open soffits or chases, and whether mold remediation or full flex replacement is required before sealing can be effective.
We give one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons at the door. The price we write down is the price you pay. Call (361) 326-5060 for a free estimate. We’ll inspect the system, explain what we found, and leave you with a written number you can compare.
We Also Serve Cities Near Altamonte Springs
Our crews work throughout Seminole and Orange Counties, including Altamonte Springs, Maitland, Longwood, Casselberry, and Winter Park. Scheduling is coordinated from our Miami office with local technicians dispatched to each area. If you’re in one of these neighboring cities and need Duct Sealing, the same pricing structure and 365-Day Done Right Promise apply.
Serving Altamonte Springs, FL - Our Local Coverage Area
We’re based in the Altamonte Springs 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 Altamonte Springs
Original 1970s-80s flex duct in Altamonte Springs needs inspection every 3 – 5 years, with cleaning and sealing performed when pressure tests show leakage above 15 percent or when visible mold and debris are present. The year-round AC runtime here means no off-season recovery period, so wear accumulates faster than in climates with a true winter break. Call (361) 326-5060 to schedule an inspection and we’ll tell you where your system stands.
The musty odor typically comes from mold and mildew growing on moisture-laden debris inside leaky ductwork, especially in original flex that has separated at joints and is weeping condensation into surrounding insulation. Sealing alone won’t fix it if the source contamination isn’t removed first. We use negative-air extraction and HEPA filtration to clean the runs, then seal and reinsulate so the moisture can’t return.
Properties near the Seminole County line or with outbuilding systems may cost 10 – 20 percent more due to longer duct runs, buried flex sections, and additional access work. We price these jobs individually after camera inspection, never over the phone with a generic quote. The written estimate is still firm before work begins.
Sealing reduces pollen infiltration by closing the leak paths that pull unfiltered attic and crawl space air into your system, but it works best paired with quality filtration at the return. We can assess your current filter setup while we’re sealing and recommend appropriate upgrades from Honeywell or Aprilaire if your air handler can accommodate them.
Our technician arrives in a marked van, inspects the full system with a camera, performs a pressure test to quantify leakage, and writes a price before touching anything. If you approve, we remove debris under negative pressure, seal all joints and seams with appropriate mastic or sealant, replace degraded insulation, and retest to verify the improvement. The whole process typically takes 4 – 6 hours for a standard home. Call (361) 326-5060 to book.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Altamonte Springs since 2004.