How to Prevent Moisture Under Mattress

Do you often feel like you’re sleeping on top of a wet sponge instead of your mattress? Do all-night tossing and turning lead to sleepless nights riddled with discomfort from excess moisture underneath? If so, there’s likely too much humidity beneath your bedding.

How to Prevent Moisture Under Mattress

Fortunately, in today’s post, we’ll be exploring the causes of troublesome moisture under mattresses and various strategies that can help prevent it.

There’s no need to endure any more restful nights! Keep reading to discover everything you need to know about how to prevent moisture under mattress to minimize dampness below your mattress once and for all.

Causes of Moisture Under Mattress

Before we dive into the solutions, it’s essential to first understand the root causes of moisture buildup under your mattress. Here are some of the most common culprits:

High Humidity Levels:

Humidity refers to the amount of water vapor in the air. When there’s excess moisture in your bedroom, it can easily penetrate through your bedding and cause dampness underneath.

Poor Ventilation:

If your bedroom is poorly ventilated, it means that there’s not enough air circulation. This can lead to moisture buildup, especially in areas where your mattress is in direct contact with the floor.

Accumulation of Sweat and Body Oils:

As you sleep, your body releases sweat and oils, which can easily seep into your mattress if it’s not adequately protected. Over time, this accumulation can lead to an unpleasant, damp environment underneath.

Now that we understand why moisture buildup happens let’s discuss some practical ways to prevent it from occurring in the first place.

Needed Materials

Given below is a checklist of items you’ll need to get started:

  • Mattress Cover
  • Waterproof Mattress Pad/protector
  • Dehumidifier
  • Moisture-absorbing Materials (Such as Baking Soda or Silica Gel Packets)
  • Air Conditioning Unit/fan

10 Step-by-step Guidelines on How to Prevent Moisture Under Mattress

Step 1: Prepare Your Mattress

Before placing your mattress on the bed frame, ensure that the area is clean and dry. Wipe off any dust or spills with a damp cloth and let it air dry completely. It is important to do this regularly, at least every time you change your sheets.

You can also use a mild disinfectant to sanitize your mattress. You can also sprinkle some baking soda on your mattress and let it sit for a few hours before vacuuming it off to absorb any unwanted odors.

Sprinkle Some Baking Soda on Your Mattress

Step 2: Invest in a Mattress Cover

A good quality mattress cover is the first line of defense against moisture buildup. It will protect your mattress from any spills, sweat, or oils that may seep through your sheets. Make sure to choose a cover that is waterproof and breathable to allow proper air circulation.

Otherwise, you might end up trapping moisture instead of preventing it. If you already have a mattress cover, make sure to regularly wash and dry it according to the manufacturer’s instructions.

Step 3: Use a Waterproof Mattress Pad/Protector

If you live in an area with high humidity levels, consider adding a waterproof mattress pad or protector on top of your mattress cover. This extra layer will provide additional protection against any moisture that may seep through.

Ensure to wash and replace it regularly to maintain its waterproofing properties. But, it is important to note that using a waterproof pad/protector will not allow your mattress to breathe as much as just the cover alone. It’s best to find a balance between protection and breathability.

Step 4: Optimize Air Circulation

As mentioned earlier, poor ventilation can lead to moisture buildup. Make sure that your bedroom has proper air circulation by opening windows or using an air conditioning unit/fan. This will help reduce excess humidity and prevent moisture from accumulating under your mattress.

But, if you live in an area with high humidity levels, it’s best to keep your bedroom door closed at night to avoid letting in more moisture. You can also use a dehumidifier to regulate humidity levels in your bedroom.

Step 5: Invest in a Dehumidifier

If you live in a particularly humid area, investing in a dehumidifier can be an effective solution to prevent moisture buildup under your mattress. It will help remove excess moisture from the air, keeping your bedroom at optimal humidity levels. However, make sure to regularly clean and maintain your dehumidifier to prevent mold growth.

Dehumidifier Can Be an Effective Solution

Step 6: Use Moisture-absorbing Materials

Another way to absorb excess moisture in your bedroom is by using moisture-absorbing materials such as baking soda or silica gel packets. You can place these near the legs of your bed or under your mattress to help prevent any dampness from forming.

It’s important to replace these materials regularly to ensure maximum effectiveness. You can also use natural materials such as activated charcoal to absorb moisture.

Step 7: Keep Your Mattress Elevated

If possible, try to elevate your mattress a few inches off the ground. This will allow for better air circulation and prevent moisture from accumulating underneath. You can use bed risers or blocks to achieve this.

You can also place a piece of plywood between the mattress and bed frame to provide additional support. Just make sure that the gap is not too large for your mattress to prevent it from sinking in. It’s also essential to regularly clean and vacuum under your bed to prevent dust buildup.

Step 8: Avoid Eating/Drinking on the Bed

Eating or drinking on your bed can lead to spills, which can cause moisture buildup under your mattress. It’s best to avoid these activities in the bedroom altogether to keep your sleeping environment clean and dry. But, if it’s unavoidable, make sure to clean any spills immediately and thoroughly dry the area. It’s also a good idea to use a waterproof protective sheet or towel while eating/drinking on the bed.

Step 9: Check for Leaks

If your bedroom is above a basement or crawl space, it’s crucial to check for any leaks in the ceiling. These can cause moisture buildup and eventually lead to mold growth under your mattress. Make sure to fix any leaks as soon as possible.

It’s also a good idea to regularly check for any cracks or gaps in your bedroom walls and floors that may allow moisture to seep in. But, if you do discover any leaks, make sure to call a professional for proper repairs. This will help prevent any future moisture buildup.

Any Cracks or Gaps in Your Bedroom Walls

Step 10: Regularly Clean Under Your Mattress

Last but not least, it’s essential to regularly clean under your mattress. This will help prevent any buildup of dust, sweat, or oils that can lead to dampness. Vacuuming and wiping the area with a mild disinfectant every few months should do the trick.

It’s also a good idea to rotate your mattress every few months to help prevent any sagging or dips from forming, which can also cause moisture buildup.

With these steps on how to prevent moisture under mattress in mind, you can now take proactive measures to prevent moisture from building up under your mattress. Remember, regular maintenance is key to keeping your mattress clean and dry. So make sure to follow these guidelines regularly to enjoy a comfortable and healthy sleeping environment.

Frequently Asked Questions

Q1. How Often Should I Clean Under My Mattress?

It’s recommended to clean under your mattress at least every three to four months. However, you can do it more frequently if you notice any signs of moisture buildup. It’s also a good idea to clean under your mattress every time you change your sheets.

Q2. Can Moisture Under My Mattress Cause Health Problems?

Yes, moisture buildup under your mattress can lead to mold and mildew growth, which can cause respiratory problems and allergies. It’s essential to address any dampness as soon as possible to avoid potential health hazards.

Q3. Can I Use a Tarp to Protect My Mattress from Moisture?

While a tarp can help protect your mattress from moisture, it’s not recommended as it can also trap heat and cause further moisture buildup. It’s best to invest in a waterproof mattress pad/protector for more effective protection.

Q4. Can I Use a Fan to Help Dry Out Moisture Under My Mattress?

Yes, using a fan can help circulate air and dry out any moisture under your mattress. Make sure to direct the airflow towards the area under your bed for best results. It’s also a good idea to use a dehumidifier in conjunction with a fan for optimal results.

Using a Fan Can Help Circulate Air


In conclusion, preventing moisture from forming under your mattress can help you create a healthier sleep environment and also get more out of your mattress investment. These simple strategies can help you reduce humidity and protect the condition of your mattress.

Keep in mind that regular airing or rotating the mattress, using breathable fabrics, and investing in a mattress protector are all helpful methods on how to prevent moisture under mattress to prevent moisture buildup. Additionally, be sure to invest in a high-quality dehumidifier for your room if you live in an especially moist climate.

Taking the time to ensure your sleeping environment is free from pooling water will guarantee an uninterrupted night’s sleep and increase the longevity of your current mattress. So what are you waiting for? Start preventing moisture by taking the right steps today!

Photo of author

Adrian Green

Adrian is a woodworking hobbyist and has loved Woodworking since he was 10 years old. Back then in childhood, his father used to have a furniture shop. He used to help his dad and learned a lot from him about how to fix woodworking furniture, basic carpentry knowledge and also about how to work hard and take care of business. He enjoys woodworking as a hobby. He loves the feeling of creating something with his own hands, and the satisfaction that comes from seeing his finished products used by others.

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