How To Make A Memory Foam Mattress Firmer? 4 Easy Steps 

If you’ve ever found yourself sinking too much into your bed, let’s check out my guide on how to make a memory foam mattress firmer! From adding a mattress topper to using plywood support, you’ll get all the tricks to transform a soft mattress into a firmer one.

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How To Make A Memory Foam Mattress Firmer?

Make A Mattress Firmer

I’ll show you four steps to make a firmer mattress of memory foam mattresses.

Step 1: Add a firm mattress topper

Consider adding firm mattress toppers as an option to increase the firmness of the mattress. Toppers come in various materials, including latex, high-density foam, or even a combination of both. I always look for one with a density of at least 2.5 lbs per cubic foot for more support. Then, place the topper on the mattress and cover it with a fitted sheet. 

Add A Topper

Step 2: Use plywood support

Get a sheet of plywood that is slightly smaller than your mattress. Then, place the plywood between your mattress and the frame, acting as a solid foundation to prevent the foam from sinking too much. Be sure to round the corners and sand the edges to avoid sharp corners that could damage your bed.

Step 3: Buy a new bed frame

Sometimes, the issue is not with the mattress itself but with the frame. If your current frame doesn’t provide adequate support for the foam, it could lead to a softer feel. In this case, consider investing in the best platform frame with sturdy slats or a solid foundation. These frame types not only distribute the weight but also provide better support for a memory foam mattress.

Step 4: Adjust room temperature

You might be surprised, but room temperature can also affect the firmness of your bed. The foam layers tend to soften in warmer conditions and firm up in colder temperatures. So I always keep my room slightly cooler during sleep time for a firmer feel. Besides, I recommend you do this because cooler temperatures are more conducive to quality sleep.

Why Should Make A Memory Foam Mattress Firmer?

This process will help your mattress provide better support for your body and increase its durability. When it’s too soft, you might sink too deeply into the foam, causing your spine to get out of alignment, leading to aches and pains. By making your bed firmer, you can alleviate these issues. The firmer surface helps keep your spine properly aligned, ensuring your muscles and joints are well-supported throughout the night.

Plus, firmer mattresses are suitable for those who suffer from back pain or have a heavier body weight. The additional support helps distribute weight more evenly and relieve pressure points. Another reason to make your bed firmer is its longevity. Over time, memory foam will wear down and lose some of its firmness. You can extend its lifespan and save more money by using simple tricks like rotating it or using a firmer topper.

Some Notes When Making A Memory Foam Mattress Firmer

Note When Making A Mattress Firmer

Based on my experience, performing this process often comes with the following considerations. Hopefully, they will make it easier for you to achieve your desired firmness:

  • Avoid over-firming: Don’t go overboard with making it super firm. Striking a balance between comfort and support is essential for good sleep.
  • Personal comfort: Remember, what feels firm to me might not be the same for you. Therefore, I recommend selecting options that align with your personal comfort preferences.
  • Test before investing: I always try different options in-store or check reviews before purchasing any accessories for my bed. 
  • Ask experts: When in doubt, I recommend consulting with experts or customer support to get advice on firmer options.


That concludes my guide on how to make a memory foam mattress firmer. You’ll have the best comfort and support by adding a firm topper, using plywood support, and adjusting the room temperature. Remember, a firm bed isn’t just about a good night’s sleep; it’s about caring for your body and overall well-being.