Duct Sealing in Lake Mary - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Lake Mary

Duct sealing in Lake Mary typically costs $400 – $900 for a whole-home system, with most jobs completed in a single visit after a written quote. If your HVAC runs constantly but rooms stay uneven, or your summer power bills keep climbing, leaky ducts are the likely culprit. Call Hollis Air Duct Cleaning at (361) 326-5060 for a free inspection and written estimate.

Call (361) 326-5060

We serve Lake Mary homeowners from our South Florida dispatch office, with crews scheduled to arrive inside the quoted window. Whether you’re in Heathrow dealing with sagging flex duct in a hot attic, or downtown near Lake Mary Boulevard with original 1960s metal trunk lines, we’ve worked on your exact setup. Our Duct Sealing team carries mastic, mesh reinforcement, and pressure-testing equipment to verify the fix before we leave. Lake Mary’s combination of humid subtropical summers and complex attic duct layouts means sealing here isn’t just about plugging gaps. It’s about understanding how heat, moisture, and poor original installation interact in your specific home type.

Why Hollis Air Duct Cleaning Is Lake Mary’s Preferred Duct Sealing Company

Hollis has been part of the Garrison Partners family since 2004. That track record matters in Lake Mary, where homeowners have seen plenty of fly-by-night outfits quote low and disappear. We operate under The Garrison Standard: written price before any work starts, background-checked uniformed technicians, and a 365-Day Done Right Promise backed in writing on every job. If the seal fails within a year, we return and make it right at no charge, including a free second visit.

Our crews know Lake Mary’s housing stock intimately. We’ve sealed ducts in Heathrow’s luxury homes with R-8 flex runs through unconditioned attics, and we’ve addressed the undersized rigid metal systems in original downtown homes built in the 1950s – 70s. This local knowledge saves time and prevents callbacks. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no waiting until Monday for scheduling.

Roy Castellanos leads Hollis Air Duct Cleaning with the same discipline he applies to every market: show up when promised, price it in writing, complete the job by the book, leave the site clean. Lake Mary residents don’t need pressure sales. They need a crew that knows the difference between a kinked flex duct and a failed trunk seam, and fixes it once.

Duct Sealing Services in Lake Mary

Duct Sealing Services in Lake Mary address the specific failure modes created by our local housing mix and climate. The job involves locating leaks in your supply and return ductwork, sealing joints and seams with mastic and reinforcement mesh, and verifying results with a pressure test. In Lake Mary’s market, a typical whole-home duct sealing runs $400 – $900, with smaller partial-system repairs starting around $250. Most homeowners need this service when rooms cool unevenly, dust blows from registers, or utility bills spike despite the HVAC running normally.

Attic Flex Duct Repair

Flexible ductwork in Heathrow and similar Lake Mary communities often sags or kinks after summers in 140-degree attics. We remove damaged sections, support new runs properly, and seal every connection with mastic rated for Florida humidity. This prevents the repeated cracking that happens when sealant is applied to stressed, unsupported flex.

Metal Duct Sealing and Static Correction

Original downtown Lake Mary homes with 1950s – 70s rigid metal ducts need sealing at every joint, but that’s only half the battle. Undersized trunks create excessive static pressure that defeats sealant over time. We evaluate the full system and recommend blower or air handler adjustments when needed.

Duct Insulation in Lake Mary

Duct Insulation in Lake Mary protects against the condensation that forms when cool air moves through hot, humid attic spaces. In Florida’s climate, uninsulated or poorly insulated ducts sweat continuously, saturating surrounding insulation, promoting mold growth, and dripping through ceiling drywall. A typical Lake Mary duct insulation project runs $600 – $1,400 depending on linear footage and accessibility, with R-8 replacement for degraded flex runs at the higher end.

We recently sealed the supply and return ducts in a 1990s Heathrow home with multiple zones, where our camera inspection found a kinked R-8 flex run sagging in the attic after a brutal summer. After HEPA filtration and source removal, we used mastic and mesh to seal the trunk and branches, then verified with a pressure test. The homeowner immediately noticed more even cooling and lower humidity.

Condensation Barrier Installation

In Lake Mary’s unconditioned attics, we install vapor barriers and replace degraded R-8 insulation on flex runs. This stops the sweating that leads to mold and water damage. We use materials rated for our humidity levels, not standard products that fail within a season.

Rigid Duct Wrap and Sealing

Metal ducts in older Lake Mary homes benefit from fiberglass wrap with proper vapor sealing. We calculate the correct R-value for your attic conditions and ensure the wrap is sealed at all seams to prevent moisture infiltration.

Trusted Brands We Service in Lake Mary

Hollis stocks parts and materials from Aprilaire, Abatement Technologies, and Guardsman for Lake Mary jobs, with Rotobrush rotary systems and Nikro negative-air machines on every truck. This means no waiting for special orders on standard repairs. When we find a failed component during your Lake Mary inspection, we typically have the replacement on hand. Our technicians explain what each product does for your specific system, in plain terms, before any work begins. We don’t leverage brand names to impress you. We use them because they hold up under Florida’s conditions.

Common Duct Sealing Problems We See in Lake Mary Homes

• Heathrow flex duct sag and kink. In Lake Mary’s newer luxury homes, flexible R-8 insulated ducts sag and kink in the attic heat, causing sealant to crack along stressed joints and leak again within a season. Proper support and mastic application prevent this cycle.
• Downtown rigid metal seam failure. Original downtown Lake Mary homes with 1950s – 70s rigid metal ducts often have undersized trunks and many unsealed seams, so a simple seal job is defeated by system static pressure unless we also address the air handler and blower motor.
• Condo shared stack pressure imbalance. Shared duct stacks in Lake Mary’s condos and apartment buildings mean sealing one unit’s branch without accounting for negative pressure changes can pull air from neighboring units or the attic, spreading odors and moisture.
• Humidity-driven mold at seal points. Lake Mary’s near-constant summer humidity means any gap in duct sealing becomes a condensation point, feeding mold that blows spores through registers and degrades indoor air quality.

Pricing for Duct Sealing in Lake Mary, FL

We Also Serve Cities Near Lake Mary

Hollis crews regularly travel to Lake Mary and surrounding communities including Longwood, Sanford, Altamonte Springs, and Winter Springs. Scheduling and dispatch are coordinated from our South Florida office, with local crews serving each area. The same written pricing, 365-Day Done Right Promise, and background-checked technicians apply in every market we cover.

FAQs About Duct Sealing in Lake Mary