How to Air Out a Crawl Space

Do you have a crawl space that’s in need of some fresh air? This area is often the catch-all for all those odd items we can’t seem to part with, like old furniture, boxes of trinkets, and holiday decorations. They may be tucked away from most eyesight, but it doesn’t make them any less of an important feature when it comes to proper ventilation indoors.

How to Air Out a Crawl Space

Ensuring your crawl space has enough airflow not only freshens up the air inside your home but also protects your foundation from moisture buildup, which could lead to mold growth and even cause structural damage if neglected!

In this blog post, we’ll discuss how to air out a crawl space and tips for keeping things dry down there in the future. Don’t let an overly wet area of your home cause long-term damage – get familiar with these useful tips and start ventilating that crawl space today!

What Will You Need?

To air out your crawl space, you’ll need a few tools and supplies:

  1. A vacuum cleaner
  2. Rubber gloves
  3. An extended-length broom or mop handle
  4. A garden hose with a sprayer attachment (optional)
  5. A fan (optional)

Once you have these items, you’re ready to get started!

10 Easy Steps on How to Air Out a Crawl Space

Step 1: Remove Any Clutter

The first step is to clear out any clutter or items that don’t belong in your crawl space. This might include old furniture, boxes of trinkets, holiday decorations, etc. Don’t forget to wear rubber gloves for safety and protection.

Step 2: Vacuum the Space

Once all the items are removed, it’s time to vacuum the area. Be sure to get into all corners and crevices with a vacuum cleaner to remove dust and debris. Wear rubber gloves when vacuuming to protect your hands from dirt and grime.

It is Time to Vacuum the Area

Step 3: Move Any Wet Spots

If you find any wet spots in your crawl space due to moisture buildup, use an extended-length broom handle or mop handle to move them around to dry out faster. There may be some residual moisture, but moving the wet spots around is important if possible. Don’t forget to wear rubber gloves for protection!

Step 4: Spray Water

If needed, use a garden hose with a sprayer attachment to spread water around the space for further moisture control. Be careful not to oversaturate the area, as this can cause more damage than good. Otherwise, just lightly spray the area to help with the airflow.

Step 5: Install Ventilation Fans

Having proper ventilation in your crawl space is key to keeping it dry and airy. Installing fans can help keep air moving and prevent moisture buildup. Make sure the fans are properly sealed to prevent any drafts or leaks.

Step 6: Place Dehumidifiers

Dehumidifiers are great tools when it comes to controlling how much moisture is in the air. This is a good option if you have an extra-moist crawl space. Additionally, it’s a great way to keep the air circulating, which helps with airflow and comfort levels.

Step 7: Add Plastic Sheet Vents

Adding a few plastic sheet vents can help airflow from the outside move through your crawl space. This will create a healthier atmosphere for your home! If you’re unsure how to install the vents, make sure you consult with a professional.

Step 8: Insulate Your Pipes

Ensure properly insulating any pipes in your crawl space to prevent moisture buildup. This can also help keep the area at an even temperature throughout the seasons. You can find pre-cut pipe insulation at most home improvement stores.

Ensure Properly Insulating Any Pipes

Step 9: Check for Leaks or Cracks

Make sure you check all around your crawl space for any leaks or cracks that could be causing extra moisture in the area. If there are any, seal them up with caulk or weatherproofing tape to keep things dry. Be careful not to block any ventilation fans during this process.

Step 10: Monitor the Humidity Level

Finally, you’ll want to monitor the humidity level of your crawl space with a hygrometer to make sure it doesn’t get too high or too low. This is important for keeping your home safe and healthy! Remember, if you ever feel uncomfortable with how your crawl space looks or smells, consult a professional for help.

By following these steps on how to air out a crawl space, you can ensure that this area of your home stays fresh and dry all year round. With proper ventilation, insulation, and monitoring, your crawl space will never be damp again!

6 Additional Tips and Tricks

  1. If you have a lot of boxes or other items stored in your crawl space, make sure to check them periodically for any signs of mold or mildew.
  2. Always keep vents and fans clear of debris to ensure proper airflow.
  3. Consider adding a dehumidifier in your crawl space to help keep the air dry and comfortable.
  4. Use weather stripping around any windows or doorframes to prevent drafts that could lead to moisture buildup.
  5. If you see any signs of water damage or mold growth, contact a professional right away to address the issue.
  6. Ensure that the drainage system around your home is working properly to help keep moisture levels low.
Drainage System Around Your Home

By following these tips and tricks, you’ll have peace of mind knowing how to air out your crawl space properly and keep it dry all year round! With just a few simple steps, you can drastically improve the ventilation and quality of your home’s crawl space. Good luck with taking care of yours!

5 Things You Should Avoid

  1. Avoid using plastic sheeting to cover the ground, as this can trap moisture, leading to mold and mildew.
  2. Resist the urge to add insulation, as this can create a humid environment, again leading to mold and mildew.
  3. Don’t seal the walls or floor with plastic sheeting or other material; this will not allow the crawl space to breathe.
  4. Do not use vent covers that prevent air from flowing freely through the crawl space.
  5. Be sure to avoid using a fan to blow air into the crawl space, as this can cause humidity levels to rise, creating condensation and water damage.

With these five tips in mind, you should be able to air out your crawl space and keep it well-ventilated successfully. Keep an eye on the humidity levels and ensure that they remain at a safe level so that your home stays healthy and free of mold or mildew buildup. Proper ventilation is key when it comes to maintaining the health of your crawl space!

Will a Crawl Space Dry Out on Its Own?

The short answer is no. A crawl space will not dry out on its own; it’s important to ensure proper airflow and ventilation for the area to stay dry and free of moisture. Without proper airflow, condensation can form, leading to mold or mildew growth in your crawl space.

In addition, make sure that any pipes or ductwork are properly insulated so that they don’t cause moisture buildup. Finally, monitor the humidity level with a hygrometer, and if needed, have a professional come out to inspect the area.

Monitor the Humidity Level With a Hygrometer

With these simple steps, you can make sure that your crawl space stays dry and healthy!

Is It Normal to Have Water in Crawl Space After Heavy Rain?

Yes, it is normal to have water in a crawl space after heavy rain. It’s important to ensure that the area is well ventilated and properly drained so that any excess water can be easily removed from the crawl space.

You should also consider using a sump pump if your home has a basement or crawlspace since this can help with removing standing water quickly. Also, inspect gutters and downspouts for clogs or blockages, as these could cause water buildup in your crawl space. Finally, install a dehumidifier or use fans to circulate air around the area and keep humidity levels low.

Overall, it is normal to have water in the crawl space after heavy rain. However, taking steps to ensure proper ventilation and drainage can help keep the area dry and free of moisture.


In conclusion, there are many things to keep in mind when dealing with the unique challenge of how to air out a crawl space. It’s important to maintain moisture levels to ensure healthy air quality and to put in place preventative steps to avoid high-moisture issues before they occur.

Additionally, using fans or dehumidifiers can help with ventilation and make your crawl space easier to enjoy for longer periods. Overall, by taking into account these considerations and tips, you can be sure you’re making the best decisions for your home and its occupants. 

Bridging the gap between confusion and having a fully ventilated crawl space has never been easier! Hopefully, the article has been informative and helpful. If you found it useful, feel free to share it with your friends and family.

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