How Does Crawl Space Encapsulation Work?

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In comparison to the rest of your home, your crawl space might seem small. 

Even so, this little space can have a big impact on the rest of your house. If you don’t take care of your crawl space, it can turn your home into an unpleasant place to live. 

That’s why you need to encapsulate your crawl space.

Not sure what that means or why it’s important? We’ve put together this guide to help you learn how encapsulating a crawl space works and why it should be your next priority.

What Is Crawl Space Encapsulation?

Encapsulation completely seals a crawl space from the rest of your home and the outside world. This prevents moisture from leaking in and keeps the air in your crawl space out of the rest of your house. 

When you encapsulate your crawl space, you’re creating a healthier living environment for you and your family and saving money along the way. 

Here’s how the encapsulation process can benefit your home.

You Won’t Have to Run the HVAC System as Much

The air in your crawl space is often damp, and when this air rises into your living area, it takes longer to cool down or heat up. That means you have to run the HVAC system for longer periods of time. 

When you encapsulate your crawl space, you cut off this passage of air into your home. Because of this, you can turn off your HVAC system more often, meaning your monthly energy bill will get lower.

Makes the Home More Comfortable

If your crawl space isn’t encapsulated, the warm or cool air in your home (and all the money you spent on the energy to get it that way) can leak through the floor into the empty space below. This will make your home colder in the winter and warmer in the summer. In other words, your house will be a much less enjoyable place to be.

Encapsulating your crawl space helps control the temperature in your home, which keeps it more comfortable for you and your family. 

Keeps the Pests Out

A crawl space that’s full of water or not sealed properly makes the perfect home for unwanted pests, such as insects and rodents. And once these pests get into your crawl space, they can find their way into the rest of your home. 

This can put your health at risk and lead to expensive extermination costs. Encapsulating your crawl spaces blocks even the smallest entrances and keeps these pests out of the area. 

Encapsulation Prevents Mold

If your crawl space is damp and full of moisture, it becomes a breeding ground for mold. This mold can spread through the rest of your home and release spores into the air. 

Living in a home full of mold can cause several serious health conditions, including allergies, asthma, and other respiratory illnesses

Since encapsulating your crawl space creates a barrier between this space and your home, it also improves the indoor air quality. This keeps you and your family healthier in your home. 

The Steps of Encapsulating a Crawl Space

Depending on the condition of your crawl space, you might not be able to start the encapsulating process right away. You might need to make a few basic repairs or preparations first. 

Here’s a quick look at the different steps of encapsulating a crawl space. 


To start, you’ll need to get an inspection. This will let you know what work your crawl space needs before you can encapsulate it (if anything). If the inspector doesn’t find anything wrong with your crawl space, you can start encapsulating it right away. 

Make Any Necessary Repairs 

If the inspection does reveal some problems, you’ll have to take care of those first. For example, before you can encapsulate your crawl space, you’ll have to drain any standing water, remove mold growth, exterminate pests, etc. 

Seal the Crawl Space

Once you finish any necessary repairs, you can start on the actual encapsulating process. 

This involves covering the floor, walls, and (sometimes) the ceiling with a polyethylene vapor barrier. After this, any remaining openings, like vents, doors, and tiny gaps or cracks will be covered with sealing tape or spray foam. 

If there are any pipes, electrical wires, joists, etc. running through your crawl space, they will be sealed off as well to prevent any drafts or pests from finding a way in. 

Add a Dehumidifier 

Encapsulating your crawl space isn’t enough to keep the area dry—at least, not on its own. You’ll also need to install a dehumidifier to dry out any moisture that still manages to get inside the space. 

The size of the dehumidifier you’ll need depends on the size of your crawl space. However, you’ll also have a humidity monitor to keep track of the conditions in your crawl space. 

How to Get Started 

Encapsulating a crawl space is a big and difficult job. Because of this, it isn’t something you should try on your own. 

To get the best results, you’ll want to find a crawl space encapsulating professional in your area. This will save you both time and money and prevent any other moisture or pests problems from developing in the future. 

Not sure who to get in touch with?

We can help you encapsulate your crawl space or waterproof your basement, no matter how big or small.

Put our honest, high-quality service to work for you. Make sure you click here to check out our services or call 443-949-3180 to contact us today!