Best Insulation For Pests Control

Learn what types of insulation will help you keep bugs and insects away from your home

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Certainly, moving forward let's delve a little deeper into two of the most efficient and well-regarded insulation types used in pest control. Understanding these options will equip you with the knowledge to choose the best insulation for pest control tailored to your specific needs.

Cellulose Insulation: This is one of the best insulation for pest control due to its unique composition. It's primarily made from recycled paper products, making it eco-friendly. However, what sets it apart is the added boric acid, an effective insecticide. This addition discourages pests, particularly bugs, from nesting and breeding within the insulation.

Spray Foam Insulation: Spray foam has a two-fold benefit when it comes to pest control. First, it expands, filling up cracks and gaps in your walls and attic, effectively blocking entry points for pests. Second, the material is quite hard for pests to chew through, making it a deterrent for rodents looking to make your home their home.

National Pest Management Association

"The best way to prevent pests from entering your home is to seal up all cracks and gaps in your home's exterior. This includes around windows, doors, pipes, and electrical outlets. You can also use pest-resistant insulation to fill in any gaps and make it more difficult for pests to get inside."

Choosing the right insulation for your home is a crucial step, but remember to incorporate it with other pest control measures for the best results. With the right strategy, you'll create a home that's comfortable for you, but uninviting for pests.

Worker installs pest control insulation

Best Insulation For Rodent Control

Have you been noticing more bugs or rodents in your home lately? Then you definitely want to get rid of them. However, quite many homeowners get puzzled at this stage because they don’t know what type of insulation to use for this purpose. Moreover, not all people know that insulation can actually work as a protective shield against bugs, mice, and rats!

"Cellulose insulation is made from recycled paper and often contains boric acid, which is toxic to insects. This makes it a good choice for preventing pests from entering your home."

The Spruce

If you realize you need to use pest-resistant insulation in your home, you need to know that the following types of insulation will stop bugs and pests from both getting into your home and spreading around it:

  1. Cellulose
  2. Spray foam
  3. Polyurethane foam

Below, you can find a more detailed description of each insulation type. Like this, you will be able to understand how it works and whether it is what you need.

Cellulose Insulation

Certainly, I can incorporate some lists into the text to enhance its readability and effectiveness. Let's see how it goes:

Cellulose insulation, championed as the best insulation for pest control, is a remarkable product that stands out in the market. It is composed of:

  1. Up to 80 percent recycled plant materials, specifically post-consumer paper, aligning with environmental considerations.
  2. The remaining 20 percent contains a variety of chemicals designed to make the insulation fire-retardant.

This mix is crucial when dealing with bugs in insulation as it reduces potential fire risks.

One of these fire-retardant chemicals is boric acid, also known as hydrogen borate. Boric acid is a multipurpose substance, known for its ability to:

  1. Absorb neutrons.
  2. Increase flame retardancy.
  3. Function as an insecticide and antiseptic.

The presence of boric acid in cellulose insulation contributes significantly to its reputation as the best attic insulation for pest control.

When an insect consumes boric acid, the substance affects the insect's nervous system, leading to its rapid demise. However, cellulose insulation's pest control abilities aren't solely due to boric acid. The physical properties of sprayed cellulose insulation are equally important in this battle against pests. Sprayed cellulose can seal damaged areas or openings - the common entry points for critters and insects.

So, what makes cellulose insulation the best for pest control?

  1. Its chemical composition, including boric acid, that works as an insecticide.
  2. Its ability to form a physical barrier when sprayed, blocking potential pest entry points.

In conclusion, cellulose insulation offers an effective solution for insulation bugs. Whether you're dealing with an existing infestation or preventing one, cellulose insulation should be on your list of considerations for home insulation.

Spray Foam Insulation

Unlike the previous insulation type, spray foam is made of isocyanate and polyol resin. The former helps for bonding and can make spray foam rigid. Usually, spray foam insulation comes in two types:

  • Open-cell spray foam
  • Closed-cell spray foam

Open-cell spray foam is softer. In addition, it can take the shape of the area it’s being sprayed in! This feature makes it a great choice for very small and narrow or curved areas and corners, as well as odd-shaped parts of an attic or basement.

"Spray foam insulation is a good choice for preventing pests because it fills in all the cracks and gaps in your home's exterior, making it difficult for pests to find a way in."


Closed-cell spray foam can also close the gaps around your windows, doors, and other openings that let pests in, but unlike open-cell insualtion, this one is more rigid due to its lack of moisture. And even though closed-cell spray foam is durable, it can’t be used the same way you use open-cell spray foam, since it dries hard!

Some of you may say that critters are less attracted to spray foam insulation than to fiberglass. Well, it’s true. However, even though a bug or small rodent tries to chew its way through it, once it realizes that it can’t get past the insulation, the critter will usually go away. But anyway, closed-cell spray foam insulation is rigid enough so a hungry rodent wouldn’t eat its way through easily!

Polyurethane Foam Insulation

Absolutely, expanding on the insightful information about polyurethane insulation, let's briefly talk about how it fits into the larger context of insulation options for pest control, and why it's considered one of the best insulation for pest control.

"Polyurethane foam insulation is also a good choice for pest prevention because it is dense and difficult for pests to burrow through."

Bob Vila

Polyurethane foam is particularly impressive in its ability to fill gaps and openings. This creates a continuous layer of insulation, leaving no room for pesky insects or rodents to penetrate. Its rigid structure deters pests from nesting, making it an ideal solution for homeowners looking to insulate their homes and keep pests out simultaneously.

Furthermore, it is essential to remember that while insulation plays a crucial role in pest control, it is not a standalone solution. Therefore, here's a brief list of additional preventive measures that work excellently in tandem with insulation for pest control:

Regular Pest Control Treatments: Even with the best insulation for pest control, it's advisable to schedule regular pest control treatments to ensure your home stays free of pests.

Sealing of Cracks and Openings: Additional to the insulation, make sure all cracks and openings are sealed. Pests are crafty and can find the smallest openings.

Cleanliness: Regular cleaning discourages pests. A clean, clutter-free home gives fewer opportunities for pests to hide and breed.

By combining the right type of insulation with these additional steps, you're establishing a comprehensive strategy that will make your home an unappealing place for pests. Your efforts towards implementing the best insulation for pest control will significantly boost the comfort and safety of your living space.

What Pests Can Insulation Be Used Against?

You already know that pest-resistant insulation can be used against mice and rats, and also against some insects. However, the range of its use is pretty wide! You can learn what other types of pests the insulation we described can help you to get rid of.


No matter the type of cockroach, people don’t want any of them in their homes. Cockroaches not only cause inconvenience, they are also dangerous for your health! These pests, if they spread enough, can cause asthma attacks and trigger allergies!

A cockroach infestation usually requires you to call an exterminator, which can be costly and inconvenient. This is why if you use insulation in your home, it can deter cockroaches from getting in, which will help you save both money and health! 


There are around 2,500 different flea species! None of them can fly, but it doesn’t prevent them from spreading since fleas are great at jumping, especially from animal to animal. Besides, fleas can affect not only your dog but us people just as badly.

Fleas can also transmit diseases: 

  • A cat scratch disease
  • Typhus
  • Plague

This is why they should be treated very seriously! If you have foam insulation in your home, it creates a tight barrier that even such tiny insects as fleas shouldn’t be able to get through.  


Ants often become another concern for homeowners. There are up to 10,000 ant species that could be the culprit, including carpenter ants, banded sugar ants, yellow crazy ants, pharaoh ants, and fire ants.

If you have ever tried to get rid of ants in your kitchen, you know how hard they are to fight. But once insulation appears in your home, just like fleas can’t get into your attic or basement with this magic shield, ants should be unable to do it as well!


People often find mosquitoes irritatting. But you should take this flying pest seriously! As it sucks your blood, a mosquito could pass along diseases such as 

  • Malaria
  • Dengue
  • Chikungunya virus
  • West Nile virus
  • The zika virus

But with new insulation in your attic or basement, you can easily separate yourself from these flying bloodsuckers. 

Now you can see why you should consider installing one of the insulation types we told you about! But even with your house insulated, you should not forget about some basic routine things that can also help you keep pests away.

What You Can Do to Keep Pests Away From Your Home

Using insulation is a goof thing of course, but if your home is dirty, improperly maintained, or has plenty of small entry points like cracks, these creatures will come back again and again, and no insulation will be able to help! This is why we recommend you always keep in mind a few useful tips that will help you prevent any type of pest infestation.

Keep Your Home Clean

Tidy up dust, debris, food scraps, and other things like that regularly. It will help you make your home less attractive for bugs and critters. Combine your cleaning routine with your new insulation, and you will have far fewer pests around.

Treat Interior Gaps

Even if your basement and attic are sealed for openings, the rest of your home can still be wide open to welcome unwanted “guests”! This is why grab a caulk gun and check for any openings that allow bugs and even small animals in. Fix all the cracks and holes you can find and reach to! You might also want to upgrade damaged or old seals and weatherstripping.

Change Your Windows And Doors To Eco-Friendly

One of the most effective types is treated cellulose insulation, which contains boric acid, a compound unappealing to pests. If bugs come in contact with boric acid in the insulation, it wreaks havoc on their nervous system, leading to their demise. This trait makes it a smart choice for attic insulation to keep bugs in insulation at bay.

It is also worth highlighting that the effective pest deterrent nature of the best insulation for pest control contributes to the overall value of your property. It's not only about maintaining a comfortable temperature in your house but also about providing a bug-free, healthy environment.

To supplement this, here are a few practical steps you could take to make the insulation more effective:

Regular Inspection: Monitor your home regularly for signs of pests. Early detection can prevent a full-blown infestation.

Proper Installation: Ensure your insulation is correctly installed. Improper installation might leave gaps that could serve as entry points for pests.

Integrated Pest Management: Consider a pest management strategy that incorporates the best insulation for pest control, proper sanitation, and biological control.

By choosing the best insulation for pest control and following these practical steps, you will significantly minimize the risk of a pest infestation, ensuring a healthier and more comfortable home environment.

Frequently Asked Questions

How Long Does Insulation Last?

As a general rule, insulation should be replaced every 15 to 20 years. However, it may need replacing sooner depending on the type of insulation installed.

How Much Does It Cost To Insulate A House?

The average cost of home insulation is between $3,000 and $10,000 for a 2,000 square foot home or between $1.50 and $5.00 per square foot.

Can I Insulate My Home Myself?

It depends on the type of insulation. Installing fiberglass or mineral wool insulation are simple DIY projects. Spray foam insulation and some other types require the use of a professional.

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