Fast, Reliable Duct Repair & Sealing Across North Fort Myers
Most homeowners in North Fort Myers don’t realize their ducts are leaking until their energy bill spikes or a room never reaches the set temperature. Duct repair and sealing in North Fort Myers typically costs $180–$650 depending on whether we’re sealing accessible joints with mastic or replacing collapsed flex runs beneath a manufactured home, and our Duct Repair & Sealing team can usually diagnose and quote the work same-day. We work across ZIPs 33903, 33917, and 33918 — from the manufactured-home parks off Pine Island Road to the site-built neighborhoods along US-41 — and we understand the sub-floor duct systems that dominate this side of the Caloosahatchee. If you’re noticing uneven cooling, musty airflow, or your AC running nonstop, call (833) 345-6820. Brian handles every job personally.
Why Keystone Air Duct Cleaning Service Fort Myers Is North Fort Myers’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in North Fort Myers one manufactured-home park at a time. Brian Rivera, our owner and lead technician, brings 17 years of duct work to every job — not a rotating crew, not a franchise hire. That matters when you’re crawling beneath a 1980s home in Holiday Park trying to trace a collapsed flex run without damaging brittle vinyl.
Our 91 verified reviews average 4.9 stars, and a significant share come from North Fort Myers customers who found us after bad experiences with generalist HVAC contractors who treated their sub-floor ducts as an afterthought. We respond to North Fort Myers calls within hours, not days, because we know that ground-level humidity here doesn’t wait. The Caloosahatchee floodplain creates conditions technicians in Cape Coral’s slab subdivisions rarely encounter — and we’ve spent years learning how to fix them correctly.
Professional-grade equipment backs the expertise: Rotobrush contact-vacuum systems for agitating mold and debris from flexible duct liners, Nikro HEPA-rated units for containing the mess, and Abatement Technologies air-scrubbing equipment when we’re working in tight sub-floor spaces. Clean, seal, and sanitize in one visit.
Our Duct Repair & Sealing Services in North Fort Myers
Flex Duct Repair
Flex duct repair is the backbone of our North Fort Myers work. The manufactured-home communities here — Holiday Park, Lazy River Village, and dozens of smaller parks packed into ZIPs 33917 and 33918 — rely on flexible vinyl or foil duct runs routed beneath the chassis rather than through a sealed attic. That sub-floor placement, combined with Lee County’s ground-level moisture, creates failure modes we simply don’t see across the river in Fort Myers proper. We repair partial collapses, reconnect separated joints, and replace damaged sections without tearing out entire runs when possible. Brian handles every job personally, and he’ll tell you straight when repair makes sense versus full replacement.
Mastic Sealant Application
Mastic sealant outperforms foil tape for North Fort Myers’s sub-floor ducts, and it’s not close. The constant humidity rising from the Caloosahatchee floodplain degrades adhesive-backed tapes within a season or two; mastic remains flexible and bonded for years. We apply it by hand at every joint, collar, and penetration, then verify with pressure testing where accessible. For manufactured homes with vinyl duct jackets, we use mastic rated for the temperature cycling these systems experience. This is precision work — messy, physical, and impossible to rush. We recently re-sealed flex duct runs under a 1980s manufactured home in Holiday Park, North Fort Myers, where a snowbird owner returned in November to find black mold established in the duct liner after months of 85°F thermostat settings. Using Rotobrush agitation and mastic sealant, we restored airflow and sealed multiple raccoon-damaged joints without replacing the entire run.
Air Leak Repair
Air leaks in North Fort Myers ducts waste money and draw contaminated air into your system. Under manufactured homes, leaks often occur where flex duct pulls away from the main trunk, at corroded metal collars, or where rodents have gnawed through vinyl jackets. We pressure-test where possible, locate leaks with smoke pencils or thermal imaging, and repair with permanent methods — not temporary patches. For site-built homes along US-41 and Pine Island Road, leaks more commonly develop at attic plenums or where decades of vibration have loosened metal seams. Same problem, different anatomy. We know both.
Duct Insulation Replacement
Insulation on sub-floor flex ducts in North Fort Myers absorbs ground moisture like a sponge. Once the fiberglass jacket becomes waterlogged, it loses R-value and becomes a mold substrate. We strip compromised insulation, treat the duct liner for microbial growth with Guardsman products, and re-wrap with vapor-barrier insulation rated for below-grade exposure. This work is grueling — crawling through mud, working overhead on your back — but it’s the difference between a three-year fix and a fifteen-year fix.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in North Fort Myers
We stock parts and materials for the systems we encounter most in North Fort Myers: Rotobrush agitation tools for cleaning mold from flexible duct liners before sealing, Nikro HEPA containment equipment to protect your home during sub-floor work, and Guardsman antimicrobial treatments for post-repair sanitizing. For customers ready to upgrade their indoor air quality, we carry Honeywell and Aprilaire filtration and purification products — installed during the same visit, not scheduled for a future callback. That matters when you’re already dealing with a duct emergency and don’t want to coordinate multiple contractors.
Common Duct Repair & Sealing Problems We See in North Fort Myers Homes
- Flex duct collapse from moisture-weakened insulation under manufactured homes in flood-prone ZIP 33917. The Caloosahatchee River floodplain keeps soil moisture exceptionally high May through October, and sub-floor duct systems absorb that humidity directly. Insulation sags, separates from the inner liner, and eventually the duct collapses under its own weight — usually discovered when a bedroom stops getting airflow entirely.
- Rodent nesting and urine accumulation in disconnected sub-floor joints, common in Lazy River Village. Raccoons, opossums, and rats exploit gaps where flex duct meets the main trunk. They nest in the insulation, contaminate the liner with waste, and often chew through the vinyl jacket. The smell hits when the AC kicks on. We encounter this weekly in North Fort Myers’s older manufactured-home parks.
- Mastic sealant failure on vinyl ducts due to constant ground humidity from the Caloosahatchee floodplain. Even previous repairs degrade if the wrong materials were used. Standard HVAC tape turns to powder; cheap mastic cracks. We remove failed repairs entirely and reapply products rated for the persistent dampness beneath these homes.
- Black mold colonization in snowbird-vacant homes returned to full cooling. North Fort Myers’s snowbird owners routinely leave thermostats at 82–85°F for five to six months; when they return in October and November, technicians consistently find visible black mold established throughout flexible duct runs. The AC runs just enough to circulate spores, but not enough to dehumidify. It’s a predictable fall wave of emergency cleanings that doesn’t occur at the same scale in year-round-occupied neighborhoods just south of the river.
Pricing for Duct Repair & Sealing in North Fort Myers, FL
Here’s what duct repair and sealing costs in the North Fort Myers market:
- Mastic sealant touch-up at accessible joints: $180–$280
- Flex duct section replacement (manufactured home sub-floor, single run): $240–$420
- Full flex duct run replacement with insulation: $380–$650
- Metal duct seam sealing and collar repair: $200–$350
- Duct insulation stripping and re-wrap: $320–$480
What moves you within these ranges? Accessibility — some homes in Holiday Park have 18-inch crawl spaces, others have 30 inches. Extent of mold contamination — light surface treatment versus full liner replacement. And whether we’re working around active rodent damage that requires exclusion repairs before sealing. We don’t quote over the phone for sub-floor work; we need to see the layout. Estimates are free. Call (833) 345-6820 to schedule Brian’s visit.
We Also Serve Cities Near North Fort Myers
Our service radius covers the full Lee County duct-repair market: Fort Myers Shores to the east, Cape Coral across the bridge, Villas for the residential subdivisions, and Fort Myers proper for site-built homes with attic duct systems. Each area has distinct housing stock and distinct duct problems — we adjust our approach accordingly.
Serving North Fort Myers, FL — Our Local Coverage Area
We’re based in the North Fort Myers 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 — Duct Repair & Sealing in North Fort Myers
Moisture that entered your sub-floor ducts during the May–October wet season doesn’t evaporate on its own in North Fort Myers’s clay-heavy floodplain soils. By November, that dampness has colonized mold inside flex duct liners and weakened insulation adhesion, meaning a small leak becomes a collapsed run by spring. Call (833) 345-6820 for a free post-wet-season inspection — we catch this before it becomes a full replacement.
Yes, partial repair is often possible if the inner vinyl liner is intact and the damage is limited to disconnected joints, localized rodent holes, or sagging insulation. We reattach, patch with mastic, and re-insulate specific sections rather than pulling entire runs. Brian will assess whether your 1980s-era ductwork qualifies — some have simply exceeded their service life.
We can seal raccoon-damaged sections after proper cleaning and antimicrobial treatment, but we don’t seal over active contamination. We remove the affected insulation, treat the liner with Guardsman products, verify no active pest entry points remain, then seal with mastic. In ZIP 33918’s park communities, we recommend concurrent exclusion work — otherwise you’re sealing in future access points.
Mastic sealant is significantly better than tape for North Fort Myers’s sub-floor ducts because the constant ground humidity from the Caloosahatchee floodplain degrades adhesive tapes within 12–24 months. Mastic remains flexible and bonded for 10+ years when properly applied. We use it exclusively for permanent repairs beneath manufactured homes.
Yes, we repair duct leaks in the 1980s–1990s site-built homes along US-41 and Pine Island Road, though the problems differ from manufactured-home parks. These homes typically have metal ductwork in slab-attic spaces or chase walls, with leaks at plenum connections and rusted collars rather than sub-floor moisture damage. Same expertise, different anatomy — Brian handles every job personally.
Ready to fix the leaks, mold, and airflow problems beneath your North Fort Myers home? Call Keystone Air Duct Cleaning Service Fort Myers at (833) 345-6820 for a free estimate. Brian handles every job personally — you’ll get 17 years of duct work expertise, professional-grade Rotobrush and Nikro equipment, and a repair that lasts through the next wet season. Estimates are free, and we can often diagnose and quote same-day.
Written by Brian Rivera, Owner at Keystone Air Duct Cleaning Service Fort Myers, serving North Fort Myers since 2007.