Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
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After
Before
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Before
AfterHow Much Does Duct Repair & Sealing Cost in Winston-Salem?
Duct repair and sealing in Winston-Salem typically costs $350 to $2,400 for most homes. Small fixes like resealing a few leaky joints or patching one disconnected run land near the low end at $350 to $650, while replacing crushed flex runs or rebuilding damaged sections of a trunk line usually fall between $1,200 and $2,400. Whole-house sealing with duct cleaning can run higher, and a free written estimate sets the exact price before any work begins.
Winston-Salem’s housing stock shapes those numbers more than most homeowners expect. A lot of the city’s ranch homes and older two-story houses were built with flexible duct in attics that reach 130°F or more in July, and that heat cooks the outer jacket until it cracks and the inner liner tears loose. When that happens, you’re not paying to clean a duct. You’re paying to replace one. Our technicians have up to 13 years of experience reading exactly that kind of damage, and the numbers below show what each repair typically runs in this market.
- Typical full repair range: $350 to $2,400
- Simple sealing job: $350 to $650
- Rebuilt or replaced duct runs: $1,200 to $2,400
- What sets the final price: a free written estimate, per job
- How to start: call (844) 834-1338
Duct Repair & Sealing Cost Breakdown (2026)
Here’s how the work breaks down by line item for the Winston-Salem market this year. Treat every figure as a typical estimate, not a quote. The written estimate you get after we’ve seen your system is the number that counts.
| Repair or Sealing Item | Typical Price Range |
|---|---|
| Sealing accessible joints and seams (mastic and tape) | $350 – $650 |
| Reconnecting a detached or fallen duct run | $250 – $500 |
| Replacing a single damaged flex duct run | $300 – $700 |
| Repairing or replacing crushed rigid trunk line sections | $900 – $2,000 |
| Rebuilding damaged plenum connections at the air handler | $700 – $1,500 |
| Whole-house duct sealing (typical single-family home) | $1,400 – $2,400 |
| Sealing plus full mechanical duct cleaning | $1,600 – $2,800 |
| Rerouting a duct run around an obstruction | $500 – $1,200 |
Two things push those ranges up or hold them down. The first is access. A duct run you can reach by lifting a few attic deck boards or popping a ceiling panel takes far less labor than one crammed behind a finished basement ceiling or sealed inside a soffit. The second is material and scope. Sealing existing joints is quick work with tape and mastic. Rebuilding a trunk line means cutting, fitting, and sealing new sheet metal or insulated flex, and that labor adds up.
What most homeowners don’t realize is that the size of the leak matters less than where it is. A gap at an attic duct joint that feeds a bedroom costs you conditioned air all summer. A gap in a return that pulls attic air back into the system drags in superheated air, dust, and whatever else is floating around up there. Both are cheap to seal compared to the energy they waste over a Winston-Salem cooling season, which runs from May into September and regularly pushes past 90°F.
What Affects Duct Repair & Sealing Pricing in Winston-Salem
Six factors move the number on your estimate more than anything else.
- Attic and crawlspace conditions. Most Winston-Salem homes run their ductwork through the attic, and summer attic temperatures in this part of the Piedmont can exceed 140°F. Working in that heat takes time and care, and badly deteriorated duct jackets usually mean more replacement than a milder climate would require.
- Duct material. Flexible duct, which is common in homes built from the 1980s through the 2000s, is cheaper to replace per run. Rigid sheet metal, found in many older homes in neighborhoods like Ardmore and West Salem, takes more labor to repair but lasts longer.
- How many leaks and how scattered. A handful of joints in one area is a small job. Leaks spread across several runs and both supply and return sides take longer to find and seal, and the labor reflects that.
- Access and layout. A single-story ranch with an open attic is easier to work in than a two-story house with ducts sandwiched between floors or running through finished space. Access drives labor on almost every job.
- Whether cleaning is bundled in. Sealing dirty ducts makes little sense, and cleaning before sealing protects the repairs you just paid for. Combining both is usually less than booking two separate visits from two different contractors.
- Whether the system has other problems. Undersized returns, an aging air handler, or a disconnected plenum can surface during a repair. We flag what we find and price the fix, so there are no surprises after the work starts.
If you’re in a part of town where homes were built in the postwar decades, like the neighborhoods off Peters Creek Parkway or around Hanes Park, expect a higher chance of crushed or sagging flex duct. Those systems have been running for a long time, and duct that sags loses its shape and restricts airflow.
Why Repair and Seal Before You Replace the System
A leaking duct system wastes the cooling and heating you’re already paying for. Sealing and repairing the ducts is almost always the cheaper move before you consider replacing a unit that might be working harder than it needs to. When a system can’t keep up in August, the ducts are often the reason, not the equipment. Repairing them restores the airflow the manufacturer designed for and lets the system do its job.
This is where a specialist beats a generalist. Our team works with professional-grade Rotobrush and Nikro equipment, the same systems commercial HVAC contractors rely on, so we can clean, inspect, and repair in the same visit. Most duct cleaners stop at the cleaning. We carry the repair work through, including sealing the joints we just cleaned. That matters because a cleaning that leaves leaks in place is only half a job. For contamination-sensitive situations, we also use Abatement Technologies equipment with containment and controlled air pressure so the workspace stays clean while the work gets done.
If you’re also looking at indoor air quality long term, we work with Honeywell and Aprilaire products, which connect the cleaning and sealing work to filtration that keeps the system running clean after we leave. And when it’s time to think about the rest of the system, our Delmar Air Duct Cleaning overview lays out how cleaning, sealing, and repair fit together.
How to Save on Duct Repair & Sealing
There are real ways to keep this bill down without cutting corners.
- Seal and clean together. Booking sealing and mechanical cleaning in one visit saves you a second dispatch and usually a second trip’s worth of setup. It’s also the right order of work.
- Fix small leaks early. A $350 sealing job now can prevent the $1,200 to $2,000 rebuild later, once cracked flex has had another summer or two of attic heat.
- Get the whole system assessed. A free estimate that maps every leak and damaged run lets you prioritize. Sometimes sealing the worst five joints gets you most of the airflow gain for a fraction of a full rebuild.
- Ask about a written estimate up front. With Delmar, the price is set per job by the written estimate. There’s no mystery about what you’ll pay before work starts.
- Address dryer vent cleaning at the same time. A clogged dryer vent is a fire risk and a separate service we handle. It’s a low-cost add when we’re already in the home.
Free estimates make the decision easier: call (844) 834-1338 and we’ll come out, look at the system, and put real numbers on paper. No cost, no obligation.
Should You Repair or Replace Leaking Ducts?
Repair is almost always the right answer unless the duct system is so deteriorated that the insulation, vapor barrier, and structure are all compromised. For most homes, targeted repair and sealing restores the system and costs a fraction of replacing the ductwork. Replacing entire runs makes sense when flex duct has lost its inner liner across most of the system, when rigid duct is crushed beyond repair, or when a remodel requires rerouting. Those are exceptions, not the norm. The right call comes down to what we find on site, which is why the estimate comes first.
How Much Does Duct Cleaning and Sealing Together Cost in Winston-Salem?
Cleaning plus sealing typically runs $1,600 to $2,800 for a single-family home in Winston-Salem. The combined price reflects one visit, one setup, and the right order of work: mechanically clean first with our Rotobrush and Nikro equipment, then seal the joints and seams we can reach so the clean air stays where it belongs. A standalone sealing job without cleaning sits lower, at $350 to $650 for accessible joints. Call (844) 834-1338 for an exact quote on your home; estimates are free.
Do You Repair Ducts or Only Clean Them?
We repair ducts, not just clean them. That’s a smaller club than it sounds. A lot of duct cleaners offer cleaning only and hand you off to a separate contractor for repairs. Delmar keeps the repair work in house, so a single call handles the diagnosis, the cleaning, the sealing, and the damaged-run replacement. You’re not coordinating two contractors or waiting for a handoff. That full-service arc, clean it, repair it, protect it, is what we do.
FAQs – Duct Repair & Sealing Cost
How much does duct repair cost in Winston-Salem?
Most duct repair jobs in Winston-Salem fall between $350 and $2,400. Simple sealing runs $350 to $650, while replacing damaged flex runs or rebuilding trunk sections lands between $1,200 and $2,400. Sealing plus cleaning together is typically $1,600 to $2,800. Call (844) 834-1338 for an exact quote; estimates are free.
How much does duct sealing cost on its own?
Duct sealing on its own typically costs $350 to $650 for accessible joints and seams, and $1,400 to $2,400 for full whole-house sealing. The difference comes down to how many joints and seams we can reach and how much of the system needs tape and mastic. Call (844) 834-1338 and we’ll price it from a free estimate.
Is it cheaper to repair ducts or replace them?
Repair is cheaper than replacement in almost every case, often by a wide margin. Replacing a full duct system costs far more than repairing and sealing the sections that are actually damaged. Replacement makes sense only when the flex lining is shot across most of the system or rigid duct is crushed beyond repair. Get the estimate first; call (844) 834-1338, free of charge.
Why do my ducts leak so much in Winston-Salem’s climate?
Attic heat is the main reason. Winston-Salem summers push attic temperatures high enough to cook flex duct jackets over time, and cracked jackets and torn liners let conditioned air escape. Temperature swings between winter and summer also flex the joints. Sealing and repairing that damage typically costs $350 to $2,400 depending on scope. Call (844) 834-1338 for a free estimate.
Can I get a free estimate for duct repair in Winston-Salem?
Yes. Every Delmar estimate is free. We come out, inspect the system, find the leaks and damage, and put the price in writing before any work starts. There’s no cost and no obligation. Call (844) 834-1338, or start with our Winston-Salem page to learn more about the area we serve.
Contact Delmar Air Duct Cleaning
Whether you’ve spotted visible debris at the vents, noticed a musty smell, or just finished a renovation and want the ducts checked, duct repair and sealing in Winston-Salem runs from $350 to $2,400 for most homes. Our technicians have up to 13 years of experience diagnosing and fixing the whole system, not just vacuuming the surface. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday, closed Saturday. Call (844) 834-1338 for a free estimate.
Pricing reflects the Winston-Salem market as of 2026. Delmar Air Duct Cleaning offers free estimates. Call (844) 834-1338.
Written by the team at Delmar Air Duct Cleaning.
What Our Customers Say
"Ran a negative air machine on the whole system rather than the shop vac on a stick that the cheap outfit down the road uses. Showed me the before and after photos from inside the trunk line and it was genuinely disgusting."
- Matt Pruitt"Found a disconnected run in the crawlspace while they were in there and told me about it rather than cleaning around it."
- Dustin Bennett"My wife's allergies had been bad in this house since we moved in. It's been two months since they did the ducts and it's noticeably better. Not a miracle, but real."
- Neil Mercer