What is Duct Sealing and Is It Worth It? A Florida Tech Answers

October 13, 2020

Your duct system is responsible for carrying air that has been heated or cooled throughout your home. If there are leaks in that duct system, however, you can lose a lot of conditioned air, which costs you money.

In fact, according to Energy Star, the average home can lose 20-30% of conditioned air to leaks in your ductwork.

Duct sealing is the process of plugging up those leaks so that your AC and heating system can run efficiency and doesn't leak conditioned air into unused areas of your home."

We know that answer doesn’t fully answer your questions, so below, we’ll talk in more detail about:

  • What duct sealing means
  • What the benefits of duct sealing are

But first, let’s look at a few signs that you may need your ducts sealed.

Want to jump straight to having your ducts sealed by a pro? We’re here to help. Learn more about the duct sealing services we offer or 

Signs you need your ducts sealed

You may need your ducts sealed if you notice:

  • Your energy bills are higher-than-normal
  • Uneven temperatures throughout your home
  • Your home is excessively dusty (no matter how much you clean)

When there are leaks in your ducts, you lose conditioned air to the spaces your ductwork travels through, like crawl spaces or the attic. This means your AC or furnace has to produce more cooled or heated air to meet the same demand, which will increase your energy bills.

Plus, depending on where the leaks are in your ductwork, unconditioned air and dirt/dust particles from unconditioned spaces (like crawlspaces and attics) can make its way into your ductwork. This is why you may notice uneven temperatures across your home and that your home may be dustier than usual. 

If you notice any of the above signs, you should reach out to a professional to test your ductwork for leaks. You could be spending significantly more on your cooling and/or heating bills than you need to because of leaks.

What is duct sealing?

Duct sealing is exactly what it sounds like: sealing up any small leaks or holes in your duct system. However, duct sealing is slightly different depending on the method used.

There are a variety of different methods for duct sealing, but a few of the most common include:

  • Foil tape (external sealing)
  • Masking (external sealing)
  • Aeroseal (internal sealing)

Let’s look at each of these methods in a little more detail.

Foil-backed tape- Foil-backed tape is exactly what it sounds like. It’s a type of tape that is backed by foil and is resistant to temperature changes, allowing it to do its job through the different seasons and fluctuating temperature of air flowing through your duct system. Foil-backed tape is a great option for small and visible leaks or cracks, like the seams between two pieces of ductwork. However, foil-backed tape isn’t as effective as other methods when it comes to really small holes that aren't immediately visible to the human eye.

Masking- Masking is a type of sticky, rubber cement that can be painted or pasted over cracks and small holes in your ductwork. Masking is a fairly messy type of sealant but is effective for smaller holes and joint racks. For larger holes, a mesh tape can be applied and then masking can be painted over it. Since masking is applied on the outside of your ductwork, it can only be applied over leaks and holes that are accessible and visible from the outside of your ductwork.

Aeroseal- Aeroseal is a aerosol sealant that is pumped into your duct system from the inside and seals leaks as it moves along your ducts. Aeroseal is probably the most effective duct sealing method because it can detect even the smallest holes (naked to the human eye) and fill them from the inside. Aeroseal is the most expensive duct sealing method but has an expected lifespan of 40 years, so it’s worth the investment.

Not sure which method is best for you? Our suggestion would be to have a professional assess your ducts to determine how extensive the leaks are and provide a recommendation on which type of duct sealing method would work best.

What are the benefits of duct sealing?What are the benefits of duct sealing?

Duct sealing provides a variety of benefits, including:

  • Increased comfort- Sealing duct leaks prevents conditioned air from leaking out of your ductwork and unconditioned air from entering your ductwork. Overall, this helps create a more-even temperature throughout your home.
  • Energy efficiency - The less leaks in your ductwork, the less conditioned air you lose to unused areas of your home (like crawl spaces or the attic). The less conditioned air that’s wasted, the less you’ll spend on energy bills.
  • Cleaner air- As we mentioned above, holes in your ductwork can also suck in debris and dust from uninsulated areas of your home. Sealing your ducts prevents that kind of debris from entering your home’s airflow.
  • Long-lasting results- If done correctly (and depending on the method used), duct sealing should last a long time, which equates to a significant amount of money in saved energy bills over time.

Need a team of experts to seal your ducts? Hire Advanced Air v

As we mentioned above, at Advanced Air, we use the most thorough kind of duct sealing, Aeroseal. So if you need your ducts cleaned and want a guarantee that it will be done correctly and completely (the first time around), Advanced Air is the best option for you.