How to Fix a Sagging Mattress

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Written by: Alex Savy
Last updated on

Having a sagging mattress is pretty common, and anyone might face such a situation with their mattress. Sometimes you might have to buy a new mattress, and sometimes you can handle the situation yourself. No matter what the mattress is made of, you might easily be able to fix it. All you need is some information on your mattress and solutions. That is why in this article we have decided to address the possible ways on how to fix a sagging mattress

Key Takeaways 

  • The most common way to fix a sagging mattress is to flip it. 
  • Other methods include using mattress toppers, more pillows, and increasing the support to the bed frame.

Reasons Why a Mattress is Saggy

Before learning how to fix a sagging mattress, you should know the reasons why your mattress might become saggy, so you can prevent it from happening to some extent. First of all, older mattresses tend to become saggy due to the material inside them wearing out. The reason is the body pressure on them throughout a long period of time. You can also find more cases of saggy mattresses among memory foam or innerspring mattresses. So if you are planning to buy a new memory foam mattress, keep that in mind. 

Your mattresses will last six to eight years, depending on their quality. However, you still need to ensure proper maintenance. Adding a mattress topper and regularly flipping your mattress helps prevent premature sagging.

Early Signs of a Sagging Mattress

There are some regions where your mattress might be sagging [1]. To find those areas, simply place a flat object on your mattress and check the parts where there is more space between the object and your mattress. The parts where the body weight tends to fall on are more likely to be saggy. If you are experiencing discomfort with your sleep, you should check whether your mattress has become saggy on the pressure points, because sagging mattresses can cause back pain by being deformed on the area where your spine needs support. To help your back, your mattress needs to be able to provide a condition where it is aligned in a straight line. Therefore, it is important to address the issue promptly.

It is wrong to say that fixing a saggy mattress is impossible, but it might be difficult. In the case of memory foam mattresses, the ways to fix the mattress can be different from other types of mattresses. That is why we are going to address those first.

Also read: How to Store a Mattress

How to Fix a Sagging Memory Foam Mattress

To fix a sagging memory foam mattress, all you need to do and all you can do, really, is flipping the mattress over so the part that is sagging goes underneath. You can simply sleep on the unused side of the mattress. Needless to say that you cannot and don’t even need to do that with the best hybrid mattresses in Canada, since they are not only made of memory foam but also innerspring. Usually, cheap memory mattresses will lose their quality very soon, so try to avoid them. Anyhow, if rotating your memory foam mattress doesn’t work, some of the ways mentioned below for all types of mattresses might work for your memory foam mattress, as well.

General Solutions to Fix Any Sagging Mattress

Flip the Mattress

First of all, if your mattress is two-sided, try flipping it over every once in a while, not only to make use of the unused side, but also to keep your mattress fresh and maintained regularly. You can also rotate your mattress so the parts where your body pressures the most would rest for a while. For example, your hips and your shoulders put the most amount of pressure on your mattress, while your feet and your legs don’t cause much sagginess to the mattress. So, you can try sleeping on the side where your feet usually face, so the other parts can gain their original shape back. All of this depends on your own mattress though. Maybe the part where you lay your head is saggy on your mattress, so you can try to change it by rotating or flipping it.

Flipping isn't always possible. The bottom side isn't usable if you use an innerspring mattress (Euro-top or pillow-top). I recommend rotating these mattresses instead. So that you wear them out evenly.

Use a Mattress Topper

If flipping your mattress doesn't work, then you can try getting a mattress topper. That is if the part of the mattress that is saggy can hardly be noticed. This type of issue can easily be fixed with a mattress topper of your choice, depending on the thickness and firmness level. Make sure you get the best mattress topper, though, because low-quality ones might further continue the problem. So, make sure the firmness level of the mattress topper you are getting is compatible with the firmness level of your mattress.  

Remember, the mattress topper isn't going to magically fix your mattress. It only helps with a little sagging. The topper won't be good if your mattress feels very lumpy.

Add more Pillows

In some cases, it is possible to fill the gap or eliminate the feeling of the mattress being saggy by using pillows under your feet or other areas of the body where it feels natural and comfortable, especially if you are experiencing back pain. Make sure you do that in the correct way since specific postures might not be healthy for the spine.

Add more Support to the Bed Foundation

The last solution before you can officially give up on your mattress and get a better new one is adding support to the foundation of the bed. [2] If your bed frames are weak, you might be able to add two new legs in the middle section so it can support the parts where more pressure tends to build up. For the bed frames that are old, there might be other things you can do as well. The second way and a popular way is to fix a sagging mattress with plywood. Plywood is a strong sheet of wood that goes right beneath the mattress and might be able to fill the gaps or force the sagging parts to become straight. While fixing a sagging mattress with plywood might be great, in some cases the mattress might be sagging because the plywood is broken. In that case, simply replace the sheet. Depending on the type of bed you use, there might be different solutions to your problem.


Now you know how to fix a sagging mattress, and you know how serious of an issue it is, and that it needs to be addressed as soon as possible. Of course, you can prevent having a sagging mattress by paying attention to the characteristics of the mattress when you are buying a new one. Additionally, it is important to change one’s mattress after some time when it gets olds, and a sagging mattress might as well just be a sign of it. However, that depends on your budget, your warranty conditions, and your mattress.

Have you ever fixed a sagging mattress? Do you have one and have more questions regarding fixing it? Feel free to share your thoughts, questions, and opinions with us in the comments section.


  1. Natural Mattress Finder (February 9, 2019) Weird trick to find out if your mattress is sagging. Retrieved from
  2. Casper editorial team (March 10, 2021) How often should you replace your mattress. Retrieved from

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