Duct Sealing in Clermont - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Clermont

Duct sealing in Clermont typically runs $450 – $950 for a whole-home job, and most homes in the area need it whether the homeowner knows it or not. We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and we’ve been sealing ductwork in Clermont since 2004. Our crews work out of our Miami scheduling office and cover Clermont neighborhoods from Clermont Ridge to the lakeside cottages along Lake Minneola, usually booking within a few days of your call. You can reach us at (361) 326-5060 for a free written estimate.

Call (361) 326-5060

Clermont’s housing tells two stories: the original metal ducts in cottages built decades ago, and the flex duct runs in subdivisions that went up after 2000. Both fail differently in this humidity, and both cost you money every month your AC runs. We find the leaks, show you where they are, and seal them with mastic and mesh or replace crushed runs before we leave. The price is written down before we start. It doesn’t move.

Why Hollis Air Duct Cleaning Is Clermont’s Preferred Duct Sealing Company

We’ve worked in Clermont long enough to know what the houses hide. In the older lakeside cottages, returning to HVAC use after vacant months often activates microbial growth inside original metal ducts, producing a musty odor on first heat cycle that signals sealing and cleaning needs. That smell isn’t “just Florida” – it’s air leaking through gaps, pulling attic heat and humidity into your living space.

Our technicians are background-checked and uniformed, and they work under The Garrison Standard: arrive inside the quoted window, price in writing, complete the job by the book, leave the site clean. Every repair carries our 365-Day Done Right Promise. If the seal fails or the odor returns within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.

Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.

Duct Repair in Clermont

Duct Repair in Clermont means fixing the physical damage that sealing alone won’t solve: disconnected runs, flex duct crushed by storage in the attic, or metal ducts corroded through from decades of condensation. We see this most often in the older homes near downtown and the lakeside cottages where original galvanized ductwork has simply reached end of life. A typical duct repair in Clermont runs $280 – $650 depending on accessibility and material.

Disconnected and Crushed Runs

Homeowners in Clermont’s newer subdivisions sometimes call us after storing holiday decorations in the attic and accidentally crushing a flex duct run. We replace the damaged section with properly insulated flex duct and seal both ends with mastic and mesh. The repair takes about two hours, and we test airflow before we leave.

Corroded Metal Duct Replacement

In Clermont’s pre-1990 homes, we regularly find metal ducts with pinhole corrosion or separated seams that leak conditioned air into the attic. We cut out the damaged section and splice in new galvanized duct, sealed at every joint. This isn’t a tape job – tape dries and fails in attic heat. Mastic and mesh is the only repair that lasts.

Air Duct Sealing in Clermont

Air Duct Sealing in Clermont addresses the gaps, joints, and penetrations where your conditioned air escapes before it reaches your rooms. In a typical Clermont home, we measure 15 – 30% airflow loss through leaks in the duct system. That means your heat pump works harder, runs longer, and wears out faster. A whole-home air duct sealing job in Clermont runs $450 – $950, with most homes falling in the $600 – $750 range.

Mastic and Mesh Application

We seal accessible joints with duct mastic, a thick, flexible compound that remains pliable in attic heat, reinforced with fiberglass mesh for structural integrity. This outlasts foil tape by years. In Clermont’s unconditioned attics, where summer temperatures exceed 140°F, tape adhesive simply cooks off. Mastic doesn’t.

Aeroseal for Inaccessible Leaks

For leaks inside wall cavities or between floors, we offer aerosolized sealant injection. The duct system is pressurized, and sealant particles find and bond at leak points. This method is particularly effective in Clermont’s two-story homes where duct runs are buried in construction. We verify results with before-and-after leakage tests.

Trusted Brands We Service in Clermont

Our Clermont crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration products from Honeywell and Aprilaire. We stock common duct diameters, insulation wraps, and sealing materials locally so we’re not waiting on parts. That means a faster turnaround for your job. When we find a crushed flex duct or a failed damper in a Clermont home, we fix it that day, not next week. The equipment matters because it lets us show you what we found – Rotobrush camera systems display the interior condition of your ducts on a screen before we start, and our Nikro negative-air machines keep dust contained during the work.

Common Duct Sealing Problems We See in Clermont Homes

• Original metal ducts in older Clermont homes lose seal integrity at joints due to attic heat expansion and contraction, leading to leaks. Every summer, the metal expands; every winter, it contracts. After twenty years, the joints simply work loose. We find these most often in the lakeside cottages near Lake Minneola and the older homes south of downtown.
• Newer subdivisions with flex duct runs often have insufficient insulation, causing condensation and mold growth from Clermont’s high humidity. The flex itself is intact, but cold air meeting humid attic air creates sweat on the exterior. That moisture drips onto ceiling drywall and breeds mold. Sealing the connections helps, but insulation upgrades are often the real fix.
• Post-thunderstorm, ceiling vent water stains in two-story homes indicate duct condensation issues that sealing alone may not fully resolve without insulation upgrades. After a week of afternoon thunderstorms, techs often find water stains around ceiling vents in Clermont’s two-story homes – a sign that duct condensation is dripping onto the drywall, a common issue in the area’s newer, tightly built houses.
• Return air leaks pull hot, humid attic air into the system, overworking heat pumps and spreading musty odors. In Clermont’s Clermont Ridge area, our crew addressed a 1990s home with original metal ducts that had loose joints leaking attic heat, causing condensation drips and musty odors; using Rotobrush agitation tools and HEPA filtration under negative pressure, we sealed the joints with mastic and mesh, restoring system efficiency and eliminating the smell.

Pricing for Duct Sealing in Clermont, FL

We Also Serve Cities Near Clermont

Our crews regularly work in Minneola, Groveland, Oakland, and Mascotte. If you’re in any of these areas and need Duct Sealing in Clermont or the surrounding communities, we cover you under the same pricing and the same 365-Day Done Right Promise. Scheduling is coordinated from our Miami office, with local crews dispatched to your home.

FAQs About Duct Sealing in Clermont