How Much Does It Cost to Repair Ductwork?

Average range: $200 - $800
Average Cost
(Fixing and sealing a leaky section of ductwork)

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Reviewed by Irene Pomares. Written by

Ducts are an essential part of every HVAC system, controlling the airflow through the home and making it easy to heat or cool rooms and spaces. Without ducts, air cannot travel consistently around your house, and it is important to keep them in good condition to ensure the airflow is not interrupted or obstructed. If issues arise with your ductwork, repairs can be made by licensed contractors and HVAC professionals.

The national cost average for ductwork repair is $200 to $800, with most homeowners paying $500 to repair a leaky section and apply a sealant to prevent future leaks. This project’s low cost is $100 to fix a damaged vent. The high cost for this project is $6,000 to professionally remove mold from a large duct system.

Cost to Repair Ductwork

Air Duct Repair Cost
National average cost$500
Average range$200-$800
Minimum cost$100
Maximum cost$6,000

Ductwork Repair Cost by Project Range

Basic repairs for a damaged vent
Average Cost
Fixing and sealing a leaky section of ductwork
Mold remediation for a large duct system

Cost to Repair Ductwork by Type

There are various types of ductwork, each with advantages and features. The type can directly impact the overall price of your repairs because some materials and forms are easier and cheaper than others. The table below shows average costs for several common types.

Cost to Repair Flexible Non-Metallic, Flexible Aluminum, Fiberglass Duct Board, or Sheet Metal Ductwork

Cost to Repair Flexible Non-Metallic, Flexible Aluminum, Fiberglass Duct Board, or Sheet Metal Ductwork

TypeAverage Costs (Labor Included)
Flexible Non-Metallic$150 - $700
Flexible Aluminum$150 - $750
Fiberglass Duct Board$200 - $800
Sheet Metal$200 - $900

Flexible Non-Metallic Ductwork Repair Price

The average cost for flexible non-metallic ductwork repairs is between $150 and $700. Flexible non-metallic ducts are some of the cheapest ducts a home can have. They can be made from different materials, and they are ideal for helping air move through tight spaces or around corners because they are flexible. However, they can suffer cracks, holes, and other damages because they are cheaper and weaker than metal alternatives.

Aluminum Flexible Duct Repair Price

Expect to pay from $150 to $750 to repair aluminum flexible ducts. Aluminum flexible ducts are ideal for branches, tight spaces, and exposed areas, and aluminum is commonly used for ductwork. It is relatively tough and resistant, but there is still a risk of aluminum ducts cracking, collapsing, or having condensation problems from lack of insulation.

Fiberglass Duct Board Repair Price

Fixing a fiberglass 1 duct board ranges from $200 to $800. Fiberglass duct boards are a popular alternative to sheet metal ducts because they are significantly cheaper to install. They also have good insulation, so they do not usually suffer from leaks or condensation issues. However, issues may arise with these ducts, such as cracks, gaps, and holes.

Sheet Metal Ductwork Repair Price

Sheet metal ductwork repairs average $200 to $900. Sheet metal is the most expensive material to have installed and repaired. However, it is one of the strongest materials, with decent insulation and durability. This type might need patching if holes appear or reattaching if it becomes loose or collapses.

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Cost to Repair Ductwork by Location

The location of your ducts also influences the cost. Ducts can be found under the home, in the attic or basement, and several other areas. Some areas are more accessible and easier to fix than others, impacting the costs. The table below shows common locations and the average repair costs for each.

Cost to Repair Ductwork by Location: Mobile Home, Basement, Attic, Crawl Space, or Under the House

Cost to Repair Ductwork by Location: Mobile Home, Basement, Attic, Crawl Space, or Under the House

LocationAverage Costs (Labor Included)
Mobile Home$150 - $600
Basement$200 - $750
Attic$200 - $800
Crawl Space$200 - $850
Under the House$250 - $900

Mobile Home Ductwork Repair Price

Homeowners pay $150 to $600 to fix mobile home ductwork. Fixing ducts in a mobile home is cheaper than fixing ducts in a regular house. This is because the duct system is usually smaller, and the ducts are more easily accessible, reducing the amount of time and labor required to do the repairs.

Basement Ductwork Repair Price

The average cost for basement ductwork repairs is between $200 and $750. The price depends on the problem and how easy it is to access your basement ducts. In most homes, basements are relatively easy to access, and contractors should not have many issues getting to the ducts, but extra labor may be needed if your basement is cluttered.

Attic Ductwork Repair Price

Fixing attic ductwork ranges from $200 to $800. It all depends on how easily accessible the attic and attic ducts are. If the attic is easily accessible and well-organized, contractors should not have problems getting there to carry out the repairs. They may take longer and cost more if the attic is hard to access or has other issues like uneven flooring.

Crawl Space Duct Repair Price

Homeowners pay between $200 to $850 to fix crawl space ductwork. This is more expensive than average because crawl spaces can be difficult to access, and it might be harder for a contractor to work in cramped conditions. Clearing out the crawlspace before the contractor arrives makes their work easier.

Repairing Ductwork Under a House Price

It costs between $250 and $900 to fix ductwork underneath the house. The price depends on how accessible the ducts are. It is almost always more expensive to repair ducts in hard-to-access areas, and under the house can be one of the trickiest places.

Cost to Repair Ductwork by Type of Repair

Various issues can arise with a home’s duct system, from holes and loose sections to rust problems, leaks, clogs, and condensation. The repair method varies depending on the problem. Costs range from high to low, depending on how much work must be done. The table below shows common repairs and the average costs for each.

Cost to Repair Ductwork by Type of Repair: Vent, Hole, Rust, Clog, Condensation, Leak, Collapsed...

Cost to Repair Ductwork by Type of Repair: Vent, Hole, Rust, Clog, Condensation, Leak, Collapsed...

Type of RepairAverage Costs (Labor Included)
Vent$100 - $250
Hole$150 - $300
Rust$150 - $350
Loose$150 - $450
Clog$150 - $500
Condensation$150 - $1,000
Leak$350 - $600
Collapsed$500 - $2,000

Duct Vent Repair Price

The average cost for duct vent repairs is between $100 and $250. Vents are situated on the ends of your ducts and can get damaged, dented, or degrade. They might need patching, cleaning, or refreshing, depending on the damage. It is usually cheaper to mend vents than replace them.

Repair a Hole in Ductwork Price

Homeowners pay between $150 and $300 to fix a hole in a duct. Holes occur for various reasons, such as impacts or gradual damage. They can cause big problems because air escapes through the hole, increasing utility bills and making the ducts less efficient. The hole must be patched to fix this.

Repair Rusted HVAC Duct Price

Repairing rust in air ducts ranges from $150 to $350. It is important to inspect for rust regularly, especially in homes where it is relatively old, because this problem must be addressed quickly. If the rust is spotted early, it can be scraped away with simple tools like steel wool and sandpaper. However, the rusted section may need to be replaced if left too long and allowed to spread, increasing costs.

Loose Ductwork Repair

Homeowners pay between $150 and $450 to deal with loose sections of ductwork. Loose sections of ducts can cause problems if left unattended because gaps and weaknesses in the structure may begin to appear, causing leaks and other issues. Mastic sealant or aluminum tape may fix loose sections or joints, or the loose parts might need to be refastened and secured.

Clogged Air Duct Repair

Expect to pay between $150 and $500 to fix a clogged air duct. The price depends on the clog’s location, how accessible it is, and how much work is needed to remove it. There are a few potential causes of clogged ducts, from dirty and clogged filters to physical blockages like pieces of insulation. The source of the problem must be found and removed.

Repair Condensation in Air Ducts

Fixing condensation in air ducts averages $150 to $1,000. There are several causes of condensation in air ducts, including clogs and blockages, a lack of insulation, and dirty filters. A contractor might need to clean the filters, remove clogs, or install new insulation, with varying costs depending on the repair type that must be done.

Air Duct Leak Repair Price

The average cost for air duct leak repairs is between $350 and $600. Leaks commonly occur due to cracks or gaps in the ducts, allowing air to escape and making the entire system less efficient. Contractors inspect the ducts to find the leak’s source and seal the area to stop air from escaping.

Repairing a Collapsed Air Duct Cost

If there is a collapsed section of ductwork, it costs between $500 and $2,000 to have it fixed. As time goes by, sections of the ducts may weaken and collapse from old age and general degradation. This issue needs to be fixed as quickly as possible because it interferes with the entire airflow. A contractor must reattach collapsed sections and secure them, possibly adding sealant and insulation.​

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Cost to Repair Ductwork by Solution

Professionals and contractors use a wide range of repair methods or solutions to fix problems. For example, they may need to patch holes or install insulation to prevent leaks or condensation issues. Costs vary depending on the solution. The table below shows common methods and the average prices for each.

Cost to Repair Ductwork by Solution: Patch, Sealing, Insulation, Rodent Proof, or Mold Removal

Cost to Repair Ductwork by Solution: Patch, Sealing, Insulation, Rodent Proof, or Mold Removal

SolutionAverage Costs (Labor Included)
Patch$150 - $300
Sealing$200 - $400
Insulation$200 - $1,000
Rodent Proof$250 - $500
Mold Removal$2,000 - $6,000

Patching Ductwork Price

Patching ductwork costs between $150 and $300. Patching is a good method to cover holes and gaps, and it can be more cost-effective to patch a damaged piece than have it replaced. To patch a hole, a piece of duct material is screwed or taped over the hole and sealed with caulk to prevent air from escaping.

Cost to Seal Ductwork

The cost to seal air ducts is between $200 and $400. Sealing is the preferred method when dealing with leaking ducts losing air from cracks and gaps. This method makes the system more efficient and lowers utility bills.

Cost to Insulate Ductwork

Insulating ductwork averages $200 to $1,000. The price depends on the insulation and the amount of insulation needed to cover the ducts. There are various types, such as fiberglass insulation, preformed duct insulation, and blown-in insulation. Good-quality insulation can reduce the risks of condensation heat loss in the ducts.

Rodent-Proof Ductwork

Homeowners pay between $250 and $500 to remove rodents and make the ducts rodent-proof to prevent future infestations. That fee covers removing mice or rats from ducts with traps and installing a sealant or cover to prevent rodents from getting into the ducts.

Ductwork Mold Removal

If there is mold in a home’s duct that must be removed, this mold removal service costs between $2,000 and $6,000. The first step is to do a mold test, with each test costing around $50. If mold is detected in the ducts, a mold remediation specialist must come to the house, find the source, and remove it. It is very important to deal with mold because spores can be released into the air and threaten a person’s health.

Labor Costs to Repair Ductwork

Homeowners have to pay between $75 and $150 per hour for the services of ductwork contractors and HVAC repair professionals. Some contractors may also have set fees for jobs rather than charging per hour. They might also have minimum fees of around $100 or call-out fees of $75 to $100, which may be waived if you hire them. Contractors can provide the necessary tools and materials to mend the ducts and charge accordingly, but you may also speak with them and arrange to purchase some or all the materials yourself.

Air Duct Inspection Cost

Air duct inspections cost between $75 and $125. Inspections are an essential part of general duct and HVAC maintenance, and they can be really useful for identifying issues before they grow into bigger problems. During an inspection, an HVAC professional can tell if and when your ducts need cleaning.

Professional Removing Bathroom Air Duct Cover from Ceiling

Air Duct Maintenance

To reduce the risk of repairs and replacements, it is a good idea to look after your home’s ducts as well as you can. You can do this in several ways. One of the most important aspects of duct maintenance is cleaning. Professional cleaners can remove dust and dirt from your ducts, or homeowners can do some or all the cleaning with a vacuum cleaner, brushes, and other basic tools. It is also a good idea to clean and change the air filters regularly to reduce the risk of the ducts getting dirty or dusty. Homeowners are encouraged to have professional ductwork inspections regularly to look for signs of damage or problems.

Repair vs Replace Ductwork

Depending on the damage, you may hesitate between repairing or replacing your duct system. Consider several factors if you are unsure, starting with the price. The national average cost of installing new ducts is between $1,900 and $6,000. You may have to pay extra fees to remove and dispose of your existing ducts. So, you may want to go ahead with the repair if it costs significantly less. However, replacing it might be the best option if your contractor gives you a high repair quote.

You should also think about your ducts age and condition. It usually lasts around 10 to 15 years in most homes, and as it gets older, it can be at a much greater risk of rust, pest infestations, gaps, cracks, and leaks. So, it might be a good idea to replace your ducts if they are old and regularly cause problems.

Comparison of the Cost to Repair or Replace Ductwork

Comparison of the Cost to Repair or Replace Ductwork

ProjectAverage Costs (Labor Included)
Repair$200 - $800
Replacement$3,000 - $6,000

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Enhancement and Improvement Costs

Air Duct Cleaning Cost

Homeowners pay between $350 and $1,000 for professional air duct cleaning. It can be significantly lower or higher, depending on your duct system’s type and size. Cleaning is important if the ducts have become dusty or dirty because dirty ducts do not function well and are at a greater risk of degrading, attracting pests, and causing problems.

Additional Considerations and Costs

  • Permit. Permits may sometimes be needed for air duct repairs and installations, especially if new sections must be installed. Check with your local building authority to learn more before doing repairs.
  • License. Ensure you work with licensed contractors and professionals when seeking repairs. Licensed pros are the most trustworthy and reliable people to work with.
  • Lifespan. It lasts between 10 and 15 years. It can last longer with good maintenance but is more likely to break and degrade as time passes.
  • Insurance. Your homeowner’s insurance should cover HVAC and duct repairs caused by named perils in your policy, but they do not usually cover repairs for wear and tear.
  • Higher bills. If you notice your energy bills have increased for no apparent reason, you may have a leak in your air ducts. If hot or cold air escapes from the ducts, utility bills increase.
  • Location. The location of the ducts can affect the costs. Ducts in hard-to-reach places are more expensive to fix because the contractor must work harder and spend more time to get to them.
  • DIY. You can do basic duct cleaning and repair work with the correct tools, experience, and guides. Contact the professionals if you are unsure about anything.


  • How much does it cost to repair air ducts?

The national average for air duct repair is between $200 and $800, but prices vary depending on the duct location and type, problem type, and level of work.

  • How do I know if my ducts are leaking?

You can tell your ducts are leaking in several ways. You might notice higher utility bills, uneven heating or cooling, or certain rooms feeling stuffier.

  • How do I fix leaky ductwork?

Gaps or cracks may need to be patched and the damaged section sealed to prevent air from escaping.

  • Why is water dripping from my ductwork?

This could be because condensation has developed inside your ducts. You may need to fit insulation to prevent this from happening.

  • What is the best way to seal ductwork?

A water-based mastic sealant is usually the best option for contractors and companies to seal ducts.

  • How do you fix a hole in a flex duct?

Foil tape can patch holes in flexible ducts. The correct tape size must be cut and applied over the hole. Mastic sealant may also be needed to seal the area.

  • How do you check airflow in ductwork?

A special instrument called an anemometer measures the airflow in your ducts.

  • Does ductwork need to be insulated?

It is unnecessary for all of it to be insulated in every home and may be considered optional in milder climates. However, insulation is recommended in many homes because it prevents condensation and other issues.

  • Should ductwork be replaced after 20 years?

It usually does not last much longer than 10 to 15 years, so this is the time when you should consider replacing it. But you may be able to keep it for a few extra years if it is in good condition.

Remodeling Terms Cheat Sheet

Definitions in laymen's terms, cost considerations, pictures and things you need to know.
See full cheat sheet.
glossary term picture Fiberglass 1 Fiberglass: Plastic that is reinforced with glass fibers. The fibers may be mixed randomly throughout the plastic, or come in the form of a flat sheet, or be woven into a fabric

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