Duct Repair & Sealing Cost - Leakage Measured, Then Priced in Writing

How Much Does Duct Repair & Sealing Cost in West Palm Beach?

Duct repair and sealing in West Palm Beach typically costs between $275 and $900 for most single-system homes, with the average job landing around $450 to $550. Larger homes with multiple air handlers or extensively damaged ductwork can push that number to $1,400 or more. These are 2026 numbers for the West Palm Beach market, shaped by local humidity, older housing stock, and the simple fact that so many ducts here run through sweltering attics where damage compounds fast.

If you’re looking for a firm number before you commit to anything: expect to pay roughly $375 to $650 to seal the accessible leaks in a typical 1,800-square-foot West Palm Beach home, and $180 to $500 for a targeted repair on a damaged section of flex duct or a failed connection joint.

Key Takeaways

• Typical total job cost: $275 to $900 for most West Palm Beach homes
• Average homeowner spend: $450 to $550
• Sealing only (accesssible ductwork): $375 to $650
• Targeted repair (one damaged section): $180 to $500
• Full duct replacement (worst-case scenario): $2,500 to $6,000+ depending on home size and crawlspace or attic access
• What drives cost: accessibility, leak count, duct material, and whether the problem is in the attic or a crawlspace

Duct Repair & Sealing Cost Breakdown (2026)

Here’s what our technicians actually see on West Palm Beach jobs. These numbers reflect current market rates, not national averages pulled from an online calculator. Labor costs in Palm Beach County run higher than the state average, and ductwork here takes a beating from salt air, mold pressure, and attic temperatures that regularly hit 130°F between May and October.

Service	Typical Price Range	What It Covers
Duct inspection & diagnostic	$99 to $250	Access point evaluation, visual inspection, leak testing where accessible. Often credited toward repair if you proceed.
Single duct connection reseal	$180 to $350	One failed joint or boot reconnected and sealed with mastic or foil-backed tape. Includes cleanup.
Patching a punctured flex duct	$150 to $300 per section	Replacing a torn or collapsed length of flexible duct up to 10 feet.
Air duct sealing (whole system, accessible)	$375 to $650	Sealing all accessible seams, joints, and boots with professional-grade mastic. Typical 1,500 to 2,200 sq ft home.
Air duct sealing (whole system, hard-to-access attic/crawl)	$650 to $1,100	Same work as above but requiring confined-space access, longer runs, or multiple attic zones.
Replacing a 10-foot section of flex duct	$250 to $450 per section	Removing old, damaged duct and installing new insulated flex. Includes sealing at both ends.
Plenum repair (supply or return)	$350 to $800	Repairing or replacing the metal box where ducts connect to the air handler. Common on older West Palm Beach homes.
Full duct system replacement (1,800 sq ft home)	$2,800 to $5,500	Complete removal and replacement of all ductwork. Includes new boots, connections, and sealing.

What drives the price up or down

Access is the single biggest variable. In West Palm Beach, most ductwork runs through attics, and some of those attics are tight, hot, and filled with blown-in insulation that makes working conditions genuinely difficult. A simple leak in an easily accessible return boot might cost $180 to fix. The same type of leak in the far corner of a low-clearance attic could run $400 because the technician is working on their back in 120-plus-degree heat with limited movement.

Duct material matters too. Older homes in neighborhoods like Flamingo Park, El Cid, and Northwood frequently have original metal ducts from the 1950s and 1960s that require custom fabrication to repair. Newer construction in communities like Ibis, RiverWalk, and The Acreage tends to use flex duct, which is cheaper to replace per linear foot but more vulnerable to pest damage and crushing.

What Affects Duct Repair & Sealing Pricing in West Palm Beach

• Attic accessibility and ceiling height. Low-slope roofs and tight attic clearances are common throughout older West Palm Beach neighborhoods. When a tech can’t stand or kneel comfortably, the job takes longer and costs more.
• The number of leaks, not just the size. Most homes we inspect have multiple small leaks at boots and connection points rather than one obvious tear. Sealing 12 small joints costs more than patching one big hole because each joint requires the same prep work: cleaning, mastic application, and cure time.
• Mold and moisture damage. The humidity in West Palm Beach means duct interiors are prime real estate for mold growth. If we find microbial contamination during a repair, the affected duct sections often need replacement rather than patching, which raises the cost.
• Pest damage. Rats and squirrels nesting in attic ductwork are a year-round issue here, especially in homes near canals, the Intracoastal, or heavily wooded areas like Pine Air and Sunshine Park. Chewed flex ducts can’t be repaired, only replaced.
• Age and code compliance. Palm Beach County enforces Florida Building Code requirements for duct insulation values and sealing standards. Older systems often need upgrading to meet current code when significant repairs are made, which adds cost but also improves efficiency.
• Urgency of the repair. Same-day and weekend service costs more in any trade. A ruptured duct in August, when your AC is running nonstop, is an emergency. A slow leak you catch in January gives you scheduling flexibility and often a better rate.

Signs You Need Duct Repair or Sealing in West Palm Beach

Most homeowners call us after noticing one of three things: a spike in the FPL bill, a room that never cools properly, or visible dust collecting on furniture within days of cleaning. Here’s what those symptoms usually mean.

Rooms that never reach the thermostat setting

If your living room hits 74 but the back bedroom sits at 79, you likely have a disconnected or crushed duct serving that zone. We see this constantly in ranch-style homes where duct runs stretch 30 to 40 feet from the air handler, and in two-story homes where the upstairs runs are crimped or poorly sealed at the riser.

A sudden jump in your electric bill without a change in usage

Leaky ducts can account for 20 to 30 percent of total conditioned air loss. In West Palm Beach, where air conditioning runs 10 to 11 months a year, that percentage adds up fast. A homeowner with a $450 summer electric bill might be spending $90 to $135 of that each month cooling their attic. Sealing those leaks usually pays for itself within 12 to 18 months.

Dust accumulating within a day or two of cleaning

Return ducts that leak on the negative-pressure side pull dirty attic air into the system. That air, loaded with insulation fibers, rat droppings, and dust, gets dumped into your living space through the supply vents. This is a repair issue, not a cleaning issue. No amount of duct cleaning will fix it until the leak is sealed.

Whistling or hissing sounds near vents

That noise is air escaping through a gap it shouldn’t be escaping through. It most often appears at the boot, where the duct connects to the ceiling or floor register. Sometimes it’s a simple reseal. Sometimes the boot itself has separated from the drywall and needs refastening.

Repair vs. Replacement: How to Decide

The honest answer: if your ductwork is less than 15 years old and the damage is localized, repair is almost always the way to go. A $300 patch job can extend the useful life of your system by a decade. If your ducts are over 20 years old and leaking in multiple zones, replacement starts to make more financial sense than chasing every leak one at a time.

Here’s a practical rule of thumb we give our own customers: add up the cost of all the repairs you’d need to fix every known problem. If that total exceeds 50 percent of the cost of a full replacement, replace. If it’s under 50 percent, repair. We’ll walk through those numbers with you on site, in writing, before any work is scheduled.

One West Palm Beach-specific factor: homes built before 1990 often have uninsulated or minimally insulated ducts. If you’re repairing anyway, it’s usually worth upgrading to R-8 insulated flex or sealing and wrapping the existing metal runs. Your cooling system works less, your electric bill drops, and you’re not paying to condition your attic. The state’s building code has required R-8 insulation on new ducts for years, and there’s a reason for that: it works in this climate.

How to Save on Duct Repair & Sealing

There’s a real difference between cutting costs and cutting corners. Here’s what actually saves you money without compromising the job.

Bundle the work. If you’re already having ducts repaired, ask about having the system cleaned and inspected at the same time. The labor and trip costs overlap, and you’ll often pay less than you would booking the services separately. At Linden Air Duct West Palm Beach, our technicians handle both cleaning and repair on the same visit, using Rotobrush and Nikro equipment for the cleaning side of the job.

Schedule for the shoulder season. September through February is the slowest period for HVAC work in West Palm Beach. It’s still hot, but the panic calls taper off. You’ll have more scheduling flexibility and avoid same-day service premiums.

Get the diagnostic done properly the first time. A $200 inspection that identifies every leak is cheaper than a $99 inspection that misses two. We quote the diagnostic upfront and credit it toward the repair if you proceed. No surprise invoices.

Ask about the written guarantee. Every air duct repair we do at Linden Air Duct West Palm Beach includes a written guarantee, covering the work for 365 days. If a covered repair doesn’t hold, we come back at no charge. That’s not a discount, but it prevents paying twice for the same problem, which is one of the quietest ways homeowners overspend on duct work.

Call for a free estimate first. You’ll get a written price before any work starts. Not a loose verbal range, not a “we’ll see how it goes.” A number on paper. Call (728) 231-8154 and we’ll schedule the estimate.

FAQs – Duct Repair & Sealing Cost

How much does it cost to seal ductwork in West Palm Beach?

Whole-system duct sealing typically costs $375 to $650 for a standard single-story home with accessible attic ductwork. Hard-to-access attics or crawlspaces push the range to $650 to $1,100. Targeted sealing of a single leak starts around $180. Call (728) 231-8154 for a precise quote, and we’ll put it in writing before any work begins.

Is duct sealing worth the cost?

For most West Palm Beach homes, yes. Leaky ducts waste 20 to 30 percent of conditioned air, which means $90 to $135 of a $450 summer electric bill is cooling your attic. A $500 sealing job often pays for itself within 12 to 18 months. The math makes sense even before you factor in the comfort improvement and dust reduction.

How much does it cost to replace a section of ductwork?

Replacing a standard 10-foot section of flex duct runs $250 to $450, including removal, new insulated duct, and sealing at both connection points. If the damaged section is in a difficult area, like a low-clearance attic corner, expect to pay toward the top of that range.

Can you come out the same day?

In most cases, yes. We keep same-day and next-day appointments open for urgent repairs, especially during the summer when a ruptured duct means a room that won’t cool below 80 degrees. Calling (728) 231-8154 gets you a live person, 24 hours a day, who can schedule the visit. The tech’s name and photo arrive before we show up.

Does homeowners insurance cover duct repair?

It depends on the cause. If a covered peril, like a fire or a fallen tree, damaged your ducts, your policy may pay for repair. If the damage is from normal wear, age, rust, or pest activity, it’s typically not covered. We recommend photographing the damage before any work is done and speaking with your adjuster first.

Duct Repair & Sealing Cost: How We Arrive at the Numbers

You’ve probably noticed that duct repair prices online vary wildly. National cost guides give ranges so broad they’re barely useful. Here’s how our numbers are built, so you can trust them.

Each quote starts with the diagnostic. The technician accesses the attic or crawlspace, inspects every accessible run, and tests connections at the supply plenum, return plenum, and all boots. That diagnosis gives us a leak count and a severity assessment for each one. From there, we quote per-leak or per-section work at a flat rate that includes labor, materials, and cleanup.

We don’t charge by the hour, because hourly billing punishes you when an attic is hard to work in. Flat-rate quoting means you know the total before we touch a single tool. That written price is the price. If we find something unexpected mid-job that changes the scope, you get a revised written proposal before any additional work proceeds. There’s no version of this where you open the door to a technician and then open your wallet to surprises at the end.

This is also where our difference from most duct companies shows. Every Linden Air Duct West Palm Beach technician is background-checked and identity-verified under the Threshold Standard. Before the visit, you’ll get the tech’s name and photo. At your door, they’ll show a photo ID badge. When you let someone into your attic, you should know exactly who they are and who sent them. Since 2004, as part of the Threshold Group family, we’ve built our work on that specific kind of clarity.

What’s Included in a Typical West Palm Beach Duct Sealing Job

Here’s what a $500 to $600 whole-system sealing job actually includes when we perform it.

The technician accesses the attic or crawlspace and works through every accessible connection point: supply plenum, return plenum, every boot, every joint where two duct sections meet. Each connection gets inspected, cleaned, and sealed with mastic, applied by brush or gloved hand to a minimum 1/16-inch thickness. We don’t use duct tape, which fails in attic heat within a few years. We use mastic rated for HVAC applications, the same material spec’d by the Florida Building Code.

After sealing, the tech inspects for any additional damage: crushed flex runs, disconnected boots, insulation that has been pulled away. Those items get flagged. If they’re within the scope of what you already approved, they get fixed. If they require additional work, you’ll get a separate written price before anything else happens.

The job wraps with a written summary of what was sealed, where, and the materials used. Every repair includes the 365-Day Done Right Promise in writing: if the work isn’t right, we make it right. If a covered repair doesn’t hold, the second visit is free.

We also make sure the tech respects your home while working: drop cloths in the areas below attic access, boot covers, and a full cleanup when the work is done. If the employee entering your house isn’t someone you feel comfortable with, that’s a problem no amount of technical skill can fix. We hire and verify accordingly.

What Duct Sealing Won’t Fix

Honesty about limits matters. Sealing ducts stops air loss at joints, seams, and boots. It does not fix a clogged evap coil. It does not clean a system that is full of years of debris. It does not fix a failing AC compressor or a mismatched air handler.

In West Palm Beach, the most common situation is a home that needs both duct sealing and duct cleaning. The dirt and debris inside the ducts get pulled in through the same leaks that bleeding your conditioned air out. Once the leaks are sealed, it’s the right moment to clean the now-isolated system. That’s why we structure our Duct Repair & Sealing in West Palm Beach service to work alongside our cleaning work, not against it.

If you’re not sure what you need, start with a diagnostic. It costs less than a month of wasted electricity in most cases, and it tells you exactly what’s wrong. From there, the decisions are straightforward because you’re working from information, not guessing.

West Palm Beach Specific Pricing Notes

Palm Beach County labor rates for HVAC-related trades run about 10 to 15 percent higher than the national average. West Palm Beach sits at the center of that market, with costs comparable to Boca Raton and slightly lower than Palm Beach island. If you’re getting quotes well below the ranges on this page, ask what’s being left out: labor, materials, permit fees, cleanup. A $99 whole-house duct sealing special is either not going to happen for $99 or it’s not actually sealing your ducts.

Salt air is another local factor. Homes within a mile or two of the Intracoastal or the Atlantic, in neighborhoods like Southland Park, Poinciana Park, and the South End, see accelerated corrosion on metal duct components. Galvanized steel plenums rust faster here. We account for that in our repairs, which sometimes means replacing a rusted plenum that would simply be patched in a drier, less corrosive climate.

And then there’s the attic heat itself. The single biggest variable in every West Palm Beach duct quote is how long a tech can safely work in a confined hot space before needing to come down, hydrate, and cool off. No reputable company should let a tech work in a 140-degree attic for hours without breaks. That heat factor is real in the number we give you. If a competing quote seems dramatically lower, ask if they’re accounting for actual working conditions or just spitballing from an online estimator.

Hiring the Right Company for Duct Repair in West Palm Beach

This is the practical check list we’d give a friend. Every point here exists because homeowners have told us about a bad experience with another company, or because we’ve seen what happens when a cut-rate repair fails six months later.

Ask for a written price before the work starts. Not an estimate, not a ballpark. A number on a document. If a company won’t write it down, don’t open the door. We provide a written price on every job, from a $180 single-joint seal to a full system replacement. No exceptions.

Ask who’s coming. A company should be able to tell you the name of the person who will be in your home before that person arrives. Linden Air Duct West Palm Beach sends the tech’s name and photo ahead of every visit. The tech shows a photo ID badge at the door. This is the Threshold Standard, and it’s how we’ve worked since 2004.

Ask what happens if the repair fails. A legitimate repair, done right, should hold. But if it doesn’t, you shouldn’t pay to fix the same problem twice. Our repairs carry a written guarantee for 365 days, with a free second visit if a covered repair fails. That’s in writing, on every repair job, no fine print about what counts and what doesn’t.

Ask about the equipment. Trade-trusted brands like Rotobrush and Nikro exist because they perform in the field, not just in a brochure. When we work on your system, we’re using equipment designed for professional duct work, paired with air-quality products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman where the job calls for them. It matters, and it shows in the result.

And if you call outside business hours, a live person should answer. Not a voicemail box, not an automated tree. At (728) 231-8154, you’ll speak to a person. 24/7. That’s been our standard for as long as we’ve been answering phones in West Palm Beach.

Get a Written Price for Your Duct Repair or Sealing Job

You don’t have to guess what your duct repair will cost. You don’t have to rely on national averages that don’t reflect West Palm Beach attic conditions, local labor rates, or the salt air working on your metal components. You can get a specific, written price for your exact situation.

Call (728) 231-8154 to schedule your estimate. A live person answers, any hour, any day. We’ll send a background-checked, identity-verified technician to inspect your ductwork, identify every issue, and hand you a written quote before any work is scheduled. You decide from there. No pressure, no surprises, no work you didn’t approve.

If you’re still gathering information, start with our home page or read more about our Duct Repair & Sealing in West Palm Beach service to see how the whole process works, from first call to final walkthrough.

Written by Marcus Veale, Owner at Linden Air Duct West Palm Beach, serving West Palm Beach homeowners since 2004.

Pricing reflects the West Palm Beach market as of 2026. Linden Air Duct West Palm Beach offers free estimates – call (728) 231-8154.