Duct Sealing in Orlando - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Orlando

Duct sealing in Orlando typically costs $400 – $1,200 for a whole-home seal depending on system size and accessibility, and most jobs are completed in a single visit with a written price agreed before any work begins. We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and our Orlando office dispatches crews across the metro six days a week. Call us at (361) 326-5060 for a free estimate.

Call (361) 326-5060

We’ve worked in Orlando homes since 2004, from the cinder block ranches off Colonial Drive to the newer subdivisions near Lake Nona and the vacation-rental corridors around Kissimmee. Orlando’s humid subtropical climate means HVAC systems run almost year-round, and the constant moisture in the air creates ideal conditions for mold and mildew growth inside ductwork, especially when systems are not properly sealed or maintained. That humidity doesn’t stay outside; it finds every gap, rust-pitted seam, and crushed flex collar in your duct system and makes the problem worse.

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

Orlando homeowners call us because we’ve built our reputation on operational specifics, not adjectives. Our technicians arrive inside the quoted window, price the job in writing before touching any equipment, and leave the site clean. Every repair is backed by our 365-Day Done Right Promise: if the work fails within a year, we return and make it right at no charge, including a free second visit. That’s not a slogan; it’s printed on every Hollis invoice.

Our crews know the local housing stock. We’ve sealed ducts in 1950s cinder block homes near Winter Park where original galvanized ductwork has rusted through at the seams, and we’ve re-tied flex duct in newer builds near Dr. Phillips where collars separated behind the air handler. Background-checked, uniformed technicians show up in marked vehicles, and phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.

We dispatch from our Orlando office, so response times to neighborhoods from Baldwin Park to MetroWest are measured in hours, not days. When a vacation-rental manager calls with a musty smell complaint and a checkout the next morning, that schedule pressure is real. We understand it because we handle it regularly.

HVAC Duct Sealing in Orlando

HVAC Duct Sealing in Orlando is the process of closing gaps, disconnected joints, and rust-pitted seams in your forced-air system so conditioned air reaches the rooms it’s supposed to reach instead of leaking into your attic or crawl space. In Orlando’s climate, unsealed ducts do more than waste energy; they pull humid outside air into the system, creating the moisture that feeds mold and mildew growth inside the supply runs. A typical whole-home seal in Orlando runs $400 – $1,200, with smaller partial seals starting around $250.

Most Orlando homeowners need duct sealing when they notice uneven temperatures between rooms, musty odors that persist after cleaning, or utility bills that climb without explanation. In older homes near College Park or Conway, we often find original ductwork that has never been sealed properly. In vacation rentals near Disney, unsealed joints pull in attic air during off-season vacancy periods, and the first guest back gets a noseful of mildew.

What the Sealing Process Looks Like

We start with a camera inspection of the supply and return runs to locate leaks, disconnections, and crushed sections. Our techs then seal accessible joints with mastic and mesh, the combination that holds up in Orlando’s attic heat and humidity. Tape alone fails here; we’ve peeled off enough dried, cracked tape to know it doesn’t last. We pressure-test after sealing to confirm the system holds.

When Sealing Becomes Repair

Sometimes we find damage that sealing alone won’t fix: rusted-out galvanized sections, collapsed flex duct, or animal damage in attic runs. We flag this during inspection, explain it with photos, and give a written price for the repair before proceeding. No surprises at the door.

Duct Repair in Orlando

Duct Repair in Orlando addresses physical damage to your duct system that sealing cannot fix: rusted-through galvanized metal, crushed flex duct, disconnected runs, or collars that have separated from the air handler. In Orlando’s housing stock, we see this most often in two places: the original galvanized ductwork in 1950s-70s cinder block homes, where rust has eaten through seams after decades of humid air exposure, and in newer subdivisions where flex duct sags and separates at the collar behind the air handler, quietly starving rooms of airflow. Duct repair in Orlando typically ranges from $300 – $900 depending on the extent of damage and material access.

Vacation-rental systems add another failure mode. Properties that sit vacant through the off-season develop leaks that go unnoticed until the next guest arrives. We’ve found children’s toys, leftover food, and even pest nests in ducts that pulled in unfiltered attic air through unsealed joints.

Rusted Galvanized Replacement

In older Orlando homes near Pine Hills or Rosemont, we regularly encounter galvanized ductwork with rust-pitted seams that leak humid air into supply runs year-round. When the metal is too far gone for sealing, we replace the section with modern duct board or flex, sealed properly at every joint. The new material won’t rust, and the mastic-and-mesh seal won’t dry out in the attic heat.

Flex Duct Reconnection and Support

Newer homes aren’t immune. We re-tie flex duct at air handler collars and add proper support straps to prevent sagging, which restricts airflow and creates low spots where condensation collects. A reconnected, supported run moves the air it was designed to move.

Trusted Brands We Service in Orlando

We stock parts and filtration products from Aprilaire, Abatement Technologies, and Guardsman, the same brands commercial crews use, so Orlando customers don’t wait for special orders. Our equipment roster includes Rotobrush rotary brush systems and Nikro negative-air machines for jobs where cleaning precedes sealing. When we recommend a component, we explain what it does and why it fits your specific system, not just the brand name. Fast turnaround matters in this market, especially for vacation-rental properties on turnover schedules.

Common Duct Sealing Problems We See in Orlando Homes

• Rust-pitted galvanized seams in older homes. Orlando’s 1950s-70s cinder block housing stock often contains original ductwork with seams that have corroded after decades of exposure to humid supply air. The leaks are small but numerous, and they add up to significant airflow loss and moisture intrusion.
• Vacation-rental mildew from off-season vacancy. Properties near Disney and Kissimmee sit empty for weeks or months, and unsealed joints pull warm, moist attic air into the system. By the time the next guest arrives, the ducts have grown mildew that no amount of surface cleaning will fix without sealing the source.
• Flex duct separation at air handler collars in newer builds. Tightly constructed subdivisions near Lake Nona and Horizon West use flex duct that can sag and pull free from the collar behind the air handler. Homeowners notice weak airflow in distant rooms, not a total system failure, so the problem persists for years.
• Failed tape seals in attic heat. Previous repair attempts using duct tape dry out and crack in Orlando’s attic temperatures. We remove the old tape and reseal with mastic and mesh, which remains flexible and airtight through heat cycles and humidity.

Pricing for Duct Sealing in Orlando, FL

We Also Serve Cities Near Orlando

Our Duct Sealing crews work throughout the Orlando metro, including Winter Park, Maitland, Goldenrod, and Altamonte Springs. Same standards, same written pricing, same 365-Day Done Right Promise in every city we serve.

FAQs About Duct Sealing in Orlando