How to Firm Up a Mattress

Mattresses can lose their firmness and sag in places over time. A mattress that is broken-down may not provide you with an adequate amount of support and can keep you up at night as you won’t be able to find a comfortable sleeping position.

This will not only impact the quality of your sleep but your health as well. If buying a new mattress is not an option for you, then you will need to find a way to firm up your existing mattress so it can provide you with the right amount of comfort and support needed for a comfortable and pain-free night’s sleep.

In this article, we are going to provide solutions that could help you firm up your mattress. Last updated Jul 28, 2020 @ 2:00 pm

Tips on How to Firm Up a Mattress

There are many things that you can do to improve the condition of your sleeping surface and make it feel a little firmer and here are some of them:

Use a Mattress Topper

If your soft mattress is preventing you from getting enough of a quality night’s sleep, perhaps adding a firm mattress topper to the top of your mattress may help.

There are various types of mattress toppers and while most of them are usually designed to make your bed softer, there are a few of them that are created with the purpose of improving the support you’re getting from your mattress.

You can get a mattress topper made of a dense memory foam or a latex mattress topper, or even polyurethane one, but you should avoid getting pads as they tend to be thinner and are usually filled with polyester or some other materials that may not provide you with the firmness and support that you need.

Replace the Damaged or Worn Out Layers

Most mattresses are usually made from several layers held in place by a mattress cover. Sometimes the reason why you may not be getting enough support is that some of these layers is damaged or simply worn out.

Inspect your mattress in detail and if this is the case, you can try to flip the layers or get the new ones to replace those that are damaged. This is also a more affordable way to firm up your mattress.

Use Plywood Boards

If your mattress is too soft, you can try to slip plywood boards between the mattress and box spring or bed frame if you don’t have a box spring.

This will help prevent your mattress from sagging and sinking too much and will prolong its lifetime. It will also give your mattress added support so you can sleep better.

However, some manufacturers don’t recommend using plywood boards underneath their bed because the materials used in its construction may need to breathe from the bottom in order to stop mold from growing. This is particularly true with memory foam mattresses.

Change Your Box Spring

If you are using a box spring, you should know that the coils used in its construction may loosen after some time due to wear and tear. When the coils loose their strength, they provide less support for your mattress than they should which in turn makes your mattress feel a lot softer.

Replacing a box spring will help you solve this problem and buying a new box spring will cost you less than buying a new mattress.

Place Your Mattress on the Floor

Another way to make your mattress feel firmer is to put it on the floor directly. However, before you do this, you should consider all dust, dirt and even bed bugs that may be on the floor and that can get to your bed.

Also, this may prevent the air from circulating freely through your mattress and may cause the appearance of mold.

Watch the Temperature in Your Room

Some types of mattresses, like memory foam and other all foam mattresses can be affected by the temperature in your room. If your room is too warm, they may become softer.

Try to adjust the thermostat in your bedroom to a lower temperature, or you can even leave a window open or get the fan going and see whether your mattress will firm up a bit. Lower temperatures should cause the foams in your mattress to harden and feel firmer.

Flip Your Mattress

If you have a flippable mattress that can be used on both sides, you should consider flipping it over from time to time.

This will even out the wear and tear on your mattress and it will remain firm longer. You should do this at least every 6 months depending on how old is your bed.


As the time passes, many mattresses, especially all foam ones can lose their firmness and become a lot softer. While some people like softer mattresses, this can be a problem for others.

If you are one of those who prefer firmer mattresses, you should know that there are ways to firm up your existing mattress instead of buying an entirely new one.

In this article we have mentioned some of the most effective ways that could help you solve your problem and make your sleep more comfortable.


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