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 Oviedo
We’re the crew that handles Duct Sealing for homeowners across Oviedo, from Live Oak Reserve to Oviedo Forest to the older streets near downtown. Our technicians are dispatched from our Miami coordination office, but they live and work in the Orlando metro, so they know the difference between a 2005 stucco two-story off Chapman Road and a 2019 build in Chapman Pines. That local knowledge matters because Oviedo homes have a specific problem: most were built after 1990 with flex duct runs sitting in unconditioned attics that hit 130°F or more, and the builder-grade tape starts failing within a few summers. If your AC runs constantly, your upstairs never cools, or you catch that wet-towel smell when the compressor kicks on, you likely have leaky ducts pulling humid attic air straight into your living space. Call us at (361) 326-5060. We’ll show up in the window we promised, price the work in writing before we touch anything, and stand behind it for a full year.
Why Hollis Air Duct Cleaning Is Oviedo’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our standard hasn’t changed: written price, written guarantee, job done by the book. In Oviedo, that standard matters more than in most markets because the housing stock here is young enough that homeowners expect everything to work perfectly, and frustrated when it doesn’t.
Our technicians are background-checked and uniformed, and they arrive with professional-grade equipment: Rotobrush rotary systems for agitation cleaning, Nikro negative-air machines for source containment, and sealing products from Abatement Technologies and Guardsman. We don’t send a guy with a shop vac and a roll of foil tape. Every job gets the 365-Day Done Right Promise in writing. If the seal fails, 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 callback queues, no “leave a message and we’ll get back to you Monday.” When you’re dealing with a musty house and a short-cycling AC in July, you need a human on the line.
We know Oviedo’s building patterns. We know which subdivisions used which builders, which attic configurations trap moisture, and why a two-year-old house can have worse duct leakage than a twenty-year-old one. That knowledge saves time and money on every job.
HVAC Duct Sealing in Oviedo
HVAC Duct Sealing in Oviedo is primarily a moisture-control and attic-infiltration job, not the dust-removal service most homeowners expect. Because nearly every house here was built after 1990 with flex duct runs in unconditioned attic space, the seams that were taped at construction are exposed to extreme heat and humidity. The adhesive on builder-grade foil tape degrades. Mastic thins and cracks. Conditioned air leaks into the attic, and unconditioned attic air gets pulled into the living space. The result: high humidity, musty odors, rooms that won’t cool, and an AC system that runs itself to death.
Our process starts with inspection, not sealing. We run cameras through the accessible duct runs to locate every leak, then clean the system with HEPA filtration and negative pressure before we seal anything. Sealing dirty ducts traps the problem. We seal at the air handler cabinet, the return plenum, every collar and boot, and all register connections, using mastic reinforced with mesh for structural joints and high-temperature sealant where the duct meets the air handler. We verify with pressure testing. Typical HVAC duct sealing in Oviedo runs $450 to $850 for a single-system home, depending on accessibility and the extent of leakage. Two-story homes with attic air handlers tend toward the higher end.
Attic Flex Duct Sealing
Most Oviedo homes use flexible ductboard or insulated flex runs suspended in the attic. These are easy to access but hard to seal permanently because the insulation sleeve traps condensation at the joints. We remove the old tape, clean the collar, apply mastic and mesh, then re-insulate with proper vapor barrier. The fix lasts.
Air Handler Cabinet Sealing
The blower motor cabinet and return plenum are where the biggest leaks hide. We seal the filter rack, the blower door, and all penetrations with high-temperature mastic. This stops the system from pulling 95°F garage air or 130°F attic air straight into your supply.
Duct Repair in Oviedo
Duct Repair in Oviedo usually means replacing collapsed, crushed, or water-damaged flex duct runs, or repairing disconnected boots where the duct has pulled away from the register. The same attic heat that degrades tape also breaks down the wire helix inside flex duct, causing sagging and kinks that block airflow. We see this constantly in Oviedo’s master-planned subdivisions, where long duct runs were installed quickly during the construction boom and have sagged over time.
Our repair process removes the damaged section, installs new flex duct with proper support straps to prevent future sagging, and seals all connections with mastic and mesh. If the damage is from condensation or roof leaks, we identify the moisture source and recommend remediation before we seal. Typical duct repair in Oviedo runs $200 to $500 per run, with most single-system homes needing one to three runs addressed. We price by the job, not by the foot, and we write it down before we start.
Crushed or Collapsed Flex Duct Replacement
Storage in the attic, pest activity, or simple gravity over fifteen years can crush a flex run flat. We replace the damaged section with new insulated flex, support it properly, and seal it to the existing system. Airflow is restored immediately.
Disconnected Boot and Register Repair
The connection between duct and register boot is a common failure point. We reattach with mechanical fasteners, seal with mastic, and verify that conditioned air reaches the room, not the gap behind your drywall.
Trusted Brands We Service in Oviedo
We seal and repair ductwork connected to every major HVAC brand found in Oviedo homes: Trane, Carrier, Lennox, Rheem, Goodman, and more. Our trucks carry sealing mastic, mesh tape, and replacement flex duct from Abatement Technologies and Guardsman, plus register boots and collars in standard sizes. We don’t run to the supply house mid-job. That stock matters in Oviedo, where a thunderstorm can turn a two-hour job into a four-hour job if you’re waiting on parts. Our technicians also work with Aprilaire filtration products when the duct repair reveals that the existing filter rack is pulling unfiltered attic air. We can upgrade the seal and the filtration in the same visit.
Common Duct Sealing Problems We See in Oviedo Homes
- Builder-grade tape failure in newer homes. The foil tape and thin mastic applied during construction in Live Oak Reserve, Oviedo Forest, and Chapman Pines degrades within three to five summers in a 130°F attic. We find it hanging loose or completely detached at every collar.
- Condensation-soaked flex duct insulation. Oviedo’s humidity plus attic heat creates a dew point inside the duct wrap. The insulation gets wet, gets heavy, sags, and separates from the collar. The wet insulation also breeds microbial growth that causes the wet-towel smell.
- Air handler and return plenum left unsealed. Many crews seal the visible supply registers but ignore the blower cabinet and return-side gaps. In Oviedo homes with attic or garage air handlers, this pulls 95°F+ unconditioned air straight into the system, defeating the purpose of sealing.
- Sealing over construction debris. Drywall dust, wood chips, and insulation scraps left in ducts from construction get sealed in place when a crew skips source removal. We clean first, seal second. Always.
Pricing for Duct Sealing in Oviedo, FL
Duct sealing in Oviedo typically costs $450 to $850 for a single-system home with attic ductwork. Two-story homes with longer runs or garage air handlers usually fall between $650 and $1,100. Duct repair runs $200 to $500 per damaged section. We price by the complete system, not by the vent, and we write the price down before any work starts. The price does not move at the door.
What moves the number: accessibility (crawlspace vs. walk-in attic), extent of leakage found during inspection, whether we need to replace damaged flex duct before sealing, and whether the air handler cabinet requires sealing as well. We do not quote over a teaser coupon price that balloons once we’re inside. Every estimate is free, every price is flat, and every job carries the 365-Day Done Right Promise. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Oviedo
Our crews work throughout Seminole County and north into the greater Orlando area. We regularly handle Duct Sealing in Oviedo and neighboring communities including Sanford, Winter Springs, Lake Mary, and Casselberry. Same standard, same equipment, same written guarantee in every city we serve.
Serving Oviedo, FL - Our Local Coverage Area
We’re based in the Oviedo 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 Oviedo
Builder-grade foil tape and thin mastic fail quickly in Oviedo’s unconditioned attics, which exceed 130°F in summer. The adhesive degrades, joints separate, and your two-year-old house starts pulling humid attic air through gaps that were never properly sealed. Call (361) 326-5060 for a free inspection.
That wet-towel smell is condensation in the flex duct insulation, caused by conditioned air leaking into the hot attic and humid attic air being drawn back in. It’s a signature problem in Oviedo’s post-1990 homes with attic duct runs. We find and seal the leaks, then verify with pressure testing. Call (361) 326-5060 to schedule.
Both. Most Oviedo homes have air handlers in unconditioned garages or attics, with flex duct runs in the attic space. We seal at the air handler cabinet, all attic joints, and every register connection. The garage air handler is a common leak point we never ignore. Call (361) 326-5060 for an estimate.
Yes. Leaky ducts force your AC to run longer to reach temperature, especially in Oviedo’s near-constant cooling season. Sealing restores designed airflow, reduces runtime, and stops the system from cooling your attic instead of your bedrooms. Most homeowners see measurable improvement within one billing cycle. Call (361) 326-5060 for a free assessment.
Look for hanging or detached foil tape at ceiling registers, uneven cooling between rooms, an AC that runs constantly, or that musty blast when the compressor starts. In Oviedo’s humid climate, tape failure is nearly universal on homes built between 1990 and 2015. We inspect with cameras and verify with pressure testing. Call (361) 326-5060 to book.
Ready to stop cooling your attic and start cooling your home? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free, written estimate on duct sealing in Oviedo. We’ll arrive in the window we promised, price the work before we start, and stand behind it for 365 days. That’s The Garrison Standard. It’s how we’ve worked since 2004.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Oviedo and the greater Orlando area.