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.
Fast, Reliable Duct Sealing Across Cypress Lake
Duct sealing in Cypress Lake typically runs $400 – $900 for a whole-home system, and most jobs are completed in a single visit with the price written down before we touch anything. If your vents are blowing musty air, your cooling bills keep climbing, or certain rooms never reach temperature, the problem is often leaks in the ductwork, not the HVAC unit itself. Call (361) 326-5060 for a free estimate – we’ll inspect the system and give you a written price you can hold us to.
We serve Cypress Lake from our South Florida dispatch office in Miami, with crews that know the local housing stock and the specific problems this coastal Lee County CDP throws at duct systems. Between the salt-laden Gulf air and the high water table that keeps humidity pressing against every building envelope, Cypress Lake ducts fail differently than they do twenty miles inland. Our technicians carry the tools to fix that difference, not just apply a generic fix and move on.
Why Hollis Air Duct Cleaning Is Cypress Lake’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004, and our Cypress Lake customers get the same standard that built that track record: written prices, written guarantees, and technicians who arrive uniformed and background-checked. The 365-Day Done Right Promise covers every job – if the seal fails or the problem returns within a year, 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, no waiting until Monday to schedule. When you call (361) 326-5060, you talk to a human who can book your Cypress Lake appointment, explain what the technician will do, and confirm the pricing structure before anyone dispatches.
Our crews know the local roads – from the Cypress Lake Drive corridor to the neighborhoods off McGregor Boulevard and the ranch-style homes near the golf course communities. That local familiarity means we arrive inside the quoted window, not two hours late with an excuse about not finding the turn.
HVAC Duct Sealing in Cypress Lake
HVAC Duct Sealing in Cypress Lake means finding every leak, gap, and corroded joint in your duct system and closing it with materials rated for this climate – mastic sealant, metal-backed tape, and mechanical fasteners where the salt air has eaten through older connections. Most Cypress Lake homes were built between the 1960s and 1990s, and their original metal duct runs are now 20 – 40 years old. The salt-laden air that blows in from the Gulf accelerates corrosion at seams and collars faster than inland Fort Myers homes experience, so sealing here is as much about stopping salt-driven corrosion at the joints as it is about stopping air loss.
A typical whole-home HVAC duct sealing job in Cypress Lake runs $400 – $900, depending on system size, accessibility, and how much of the original ductwork needs attention. We inspect first, price in writing, then perform the work – no per-vent add-ons, no surprise charges once the van is in your driveway.
What the Inspection Covers
Our technician pressurizes the duct system and measures airflow loss at the air handler, then inspects the attic trunk lines, branch connections, and register boots with a camera where access allows. In Cypress Lake, we pay particular attention to the return side and the air handler plenum, because those are the points where humid attic air gets pulled into the system when joints fail.
Materials That Hold Up Here
Standard duct tape fails within a season in this humidity. We use UL-181 rated mastic and foil-backed tape, plus mechanical reinforcement at corroded collars. On 20 – 40-year-old metal ducts whose surfaces have been etched by salt air, we prep the metal before sealing so the bond actually holds through near-year-round HVAC cycling.
Duct Repair in Cypress Lake
Duct Repair in Cypress Lake addresses the damage that comes after years of salt corrosion, hurricane-driven debris, and the kind of water infiltration that follows heavy summer rains or named storms. When seams corrode through, joints disconnect, or insulation deteriorates to the point of falling off the trunk line, sealing alone won’t fix it – the damaged section needs to be replaced or rebuilt, then sealed properly.
Most duct repairs in Cypress Lake fall in the $300 – $700 range for isolated section replacement, with full trunk line rebuilds running higher depending on linear footage and attic accessibility. We give you the written price before any cutting or removal starts, and we photograph the damage so you see why the repair is necessary.
Storm Damage and Water Infiltration
After a named storm or even a heavy summer downpour, technicians in Cypress Lake routinely find that attic ductwork has been infiltrated by wind-driven rain and attic insulation debris. We remove the contaminated material, repair or replace the damaged sections, and seal the system so it doesn’t happen again the next time a storm blows through.
Disconnected Joints and Collar Replacement
The most common failure we see in Cypress Lake’s older ranch homes is the collar connection at the air handler plenum working loose after decades of vibration and salt corrosion. We replace the corroded collar, reconnect with a mechanical seal, and wrap with fresh insulation so the joint doesn’t become a moisture entry point again.
Trusted Brands We Service in Cypress Lake
Our equipment roster includes Nikro negative-air machines for controlled debris removal, plus filtration and sealing products from Honeywell and Aprilaire. We stock the fittings, collars, and mastic compounds that Cypress Lake’s older duct systems need, so we’re not ordering parts and making you wait. When a 1980s ranch on the west side of Cypress Lake needs a collar size that newer construction doesn’t use, we typically have it on the truck. That local parts readiness is part of The Garrison Standard – arrive prepared, price in writing, finish the job without a return trip for missing materials.
Common Duct Sealing Problems We See in Cypress Lake Homes
- Fogging “sanitiser” upsells that mask the real problem. A fogging treatment sprays chemical into the ducts but does nothing to fix the salt-corroded seams and disconnected joints that are pulling humid attic air into the system. The smell comes back within weeks because the moisture source is still there.
- Sealing only the visible supply registers while leaving the return side open. This is the half-measure that lets salt air and attic moisture keep entering through the unsealed return plenum and air handler connections, undermining any benefit from the supply-side work.
- Standard mastic or tape applied to salt-etched metal without surface prep. On 20 – 40-year-old metal ducts whose surfaces have been corroded by Gulf air, the seal fails within a season of near-year-round HVAC cycling because the adhesive can’t bond to oxidized metal.
- Ignoring the insulation wrap after sealing the joint. Even a properly sealed metal joint will sweat in Cypress Lake’s humidity if the insulation is missing or deteriorated, creating condensation that breeds microbial growth and re-corrodes the repair.
Pricing for Duct Sealing in Cypress Lake, FL
Whole-home duct sealing in Cypress Lake typically costs $400 – $900. Isolated duct repairs run $300 – $700. What moves the number: system size (a 2-ton system has less ductwork than a 5-ton), attic accessibility (tight truss spaces take longer), and how much of the original 20 – 40-year-old ductwork needs attention versus replacement.
We do not quote per-vent prices. That structure invites bait-and-switch: a low teaser rate per register that balloons once the technician is inside and “discovers” additional problems. Our price is one flat price per system, agreed in writing before work starts, based on what we find during the initial inspection. If we find something unexpected, we stop and show you – we do not proceed and invoice later.
Every estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Cypress Lake
Our crews travel throughout South and Central Florida for Duct Sealing work. We regularly serve Jacksonville, Miami, Tampa, and Orlando with the same written pricing and 365-Day Done Right Promise that Cypress Lake customers receive. Scheduling and dispatch are coordinated from our Miami office, with local crews deployed to each market.
Serving Cypress Lake, FL - Our Local Coverage Area
We’re based in the Cypress Lake 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 Cypress Lake
Yes, genuine duct sealing helps with mold smell when the odor is caused by humid outside air entering through leaks and condensing inside the duct system. The fogging “sanitiser” treatments that some companies sell only mask the smell temporarily; sealing the actual leaks stops the moisture source that feeds microbial growth. Call (361) 326-5060 and we’ll inspect whether your smell is coming from leaky joints or something else entirely – estimates are free.
1980s ranch homes in Cypress Lake have original or early-replacement duct systems that are now 35 – 40 years old, and the salt-laden Gulf air has been corroding the seams and collars that entire time. A newer home inland has less salt exposure and typically newer flex duct or sealed metal systems that don’t have the same corrosion pattern. Sealing matters more here because the joints are actively failing from salt etching, not just age. Call (361) 326-5060 for an inspection – we’ll show you the corrosion with a camera.
We typically find wind-driven rain has entered attic ductwork through damaged roof vents or compromised chase openings, and we perform full duct cleaning with source removal under negative pressure before sealing the new leaks and replacing any water-damaged insulation. The sealing work focuses on the entry points where storm water and debris got in, plus any joints that failed from the humidity spike. Call (361) 326-5060 after any storm – we prioritize calls where water infiltration is suspected.
If certain rooms are consistently hotter or cooler than others, your energy bills are rising without rate increases, or you feel weak airflow at registers despite a running blower, you likely have leaks that cleaning won’t fix. Cleaning removes debris; sealing restores the pressure boundary that forces conditioned air to the rooms that need it. We test system pressure during our free inspection and show you the numbers. Call (361) 326-5060 to schedule.
Yes – a typical Cypress Lake home loses 20 – 30% of conditioned air through duct leaks before it reaches the rooms, which means the HVAC runs longer to hit thermostat setpoints. Sealing those leaks reduces runtime, which cuts wear on the equipment and lowers electric bills. In a climate where cooling runs ten or eleven months a year, that efficiency gain compounds. Call (361) 326-5060 for a written estimate on your system.
Ready to stop throwing conditioned air into your attic? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free duct sealing estimate in Cypress Lake. We’ll inspect your system, show you what we find, and give you a written price before any work begins – backed by our 365-Day Done Right Promise.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Cypress Lake and the greater Lee County area.




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