How to Restore a Memory Foam Mattress

Romeo Vitelli
Romeo Vitelli
Expert Writer
Received his doctorate in Psychology in 1987, spent fifteen years as a staff psychologist in Millbrook Correctional Centre. In 2003 went into full-time private practice. read more
Reviewed By
Medical Advisory Team
Medical Advisory Team
Includes well-known professionals, who together provide decades of sleep medicine experience that enables Talk About Sleep to fulfill its mission of creating access to high- read more
Last updated: August 16, 2023
TalkAboutSleep is reader-supported. We may earn a commission through products purchased using links on this page. Learn more about our process here

It’s quite normal that memory foam mattresses can lose their shape and support after many years of use. This is why it’s essential to know how to restore memory foam mattress, as it’ll only get more uncomfortable until it starts causing issues.

There are many negative effects to sleeping on a terrible mattress. Physically it can start to cause back and neck issues. This, in turn, will cause poor quality sleep. There are also the issues caused by the build-up of bacteria and bed bugs.

The good news is there’s a remedy for an old and sagging mattress, so you won’t have to end up  buying a new one Trusted Source How to buy a mattress that is perfect for you - The Washington Post The only thing more exhausting than sleeping on a bad mattress is shopping for a new one. . Here we look at the steps you can take to restore a memory foam mattress. We’ll look at the causes, solutions and clear up any queries with our FAQs. Let’s get started!

Steps to fix mattress sagging

To restore a memory foam mattress to its original shape and purpose, you must install a mattress topper, increase mattress support, turn your mattress and get a sturdy foundation. It also helps to consider its lifespan and ensure that the bed frame is well-supported.

In this article, you will learn about restoring memory foam mattresses and some possible reasons why the mattress sags. At the same time, we’ll also discuss how to prevent memory foam mattresses from sagging and the effects of a sagging mattress for you.

Use a mattress topper or pad

How to Restore a Memory Foam MattressA mattress topper or a mattress pad is the most effective way to fix a sagging mattress because it can add an extra layer to your bed. This increases the level of protection and support to the mattress. The best mattress toppers, such as the Linenspa 2-Inch Gel-Infused model, are thicker than mattress pads, yet whichever you’ll use, it can enhance the comfort of your bed.

Adding mattress toppers or pads can minimize some of your physical problems, such as back pain, neck pain, and headache. For better quality sleep, you must look for a mattress topper made of foam or latex mattress material, while the mattress pad such be made of wool, polyester, or cotton.

Improve mattress support

Sometimes a mattress will sag because of the weak support, such as an issue with the frame. A high-quality bed frame can add more support to the mattress. With sufficient support, you are not going to experience some unfortunate problems of having your mattress dipping down between the slats or bowing in the middle.

You’ll have to fill in any gaps where it’s easy for the memory foam to sneak through. If you have a frame with slats, they may need additional support or fixing securely into place to prevent a memory foam mattress sinking middle. If you have a different type of bed frame, inspect it to see if there are any places where it’s uneven.

Turn your mattress

How to Restore a Memory Foam MattressIf adding a mattress topper/pad and a supportive bed frame is still not effective, then another memory foam mattress sagging fix is rotating it, as this will prevent it from further wear and tear. Sometimes, the lack of rotation is the main reason why the mattress sags, as some people sleep on the same spot over and over again. That’s why there’s a large dip created when they wake up. Whether the mattress is newly-bought or an old one, and if you are sleeping in the same position every day, then the sag is most likely created by your sleeping habit.

Although rotating the mattress doesn’t guarantee a total fix on your problem, it’s still worth a try. There are some situations where completely flipping the mattress can be a good idea, only if the mattress is dual-sided. Turning your mattress upside down may seem like a good idea, but most models are only designed to be used one way, as they have layers.

If your mattress can be flipped over, then give that a try. If not, then rotate it, so you’re sleeping on a spot of the mattress that you’ve not used before.

Add additional support

To bring back the comfort, another idea is to place something under the mattress where the sagging is happening. This will lift up the mattress and bring the sagging part back to the level of the rest of the mattress. It’s the right solution if you have a memory foam mattress not returning shape issue.

While there are products available that can help with this, you can experiment at home. Thin pillows can be a way to go or any foam if you have it. Even the likes of a piece of plywood can offer additional support.

Check your warranty

The product’s warranty is one of the most important things that you have to remember. Most high-quality memory foam mattresses have generous warranties of more than a year, compared to other types of products.

If you’ve not had your mattress for a long time, then see what rights you have can check your warranty. It could be that you’ve got a defective mattress that needs replacing. Mattresses should last for a long time, and if yours has an issue, then it may not be your fault.

Reasons for mattress sagging

All mattresses will get worse over time, but some much more quickly than others. Here are some reasons that caused the mattress to sag.

Extra weight

It’s better to buy a thicker mattress because it’s more durable than the thinner ones. Most memory foam mattresses are more than 10 inches thick. If you’ll choose less than 10 inches thick, then it has more tendency to sag, and it won’t last as long. It’s okay if you’re alone in bed. However, if you have a partner, there’s an added extra weight that the mattress cannot cope with over time.

To prevent the mattress from sagging, you’ll have to add more support to the bed’s base. It would also help if you’ll use a mattress topper to slow down the sag’s progression. As your body’s weight creates pressure, then it’s no wonder that the mattress will sag over time, even if you’re a healthy weight.

Poor support

As mentioned above, you need strong support to ensure that the mattress can survive for many years. What’s good about having excellent mattress support is that it prevents you from sinking into the bed and keeps the mattress in shape. If you have a memory foam with poor support, then sagging will be experienced faster.

Improvisation is needed when you’re already experiencing these things. Mattress helpers can be very useful during this situation as they can create a stronger support base. A great mattress needs great support otherwise, it will struggle to cope with the pressure and daily use.

Improper foundation

How to Restore a Memory Foam MattressWhat people often overlooked is the foundation, which is pretty fundamental to keep the mattress in good health. It would also help if you’ll consider reading through the product’s manual, instructions, and guidelines so you can cope with the mattress’s specifications and needs. The manual should provide you all the information, such as the type of foundation the bed frame needs.

Generally, you have to know that a 3-inch space in between the slats is too much. Weight will automatically push the mattress into space, which is why it’s advised space should never be more than 2.8 inches.


Mattresses are just like any products that get worse over time. Consider that the lifespan of the best memory foam mattresses is only up to 10-15 years. Over time the foam will become compressed and change shape. It could just be that your mattress is old and tired.

Lack of care

How to Restore a Memory Foam MattressYou need to take care of your mattress from the day you get it. This includes not putting too much pressure on one area and taking the steps that we’ve looked at here. You may also have other things to worry about, such as your kids jumping up and down on it! However you use your mattress, look after it. Regular cleaning will also help to prevent other issues.

How to prevent a memory foam mattress from sagging

There’s nothing more uncomfortable than a sagging foam because it will not let your body rest properly. Prevention is always better than trying to cure an issue. Here are some ways where you can prevent the memory foam mattress from sagging.

Ensure the mattress has a solid base

Most mattresses nowadays come with either slats or box springs. Whichever one you have, make sure it’s providing a solid enough base for your mattress. Your mattress should be level over the top of it. If it’s not, then there will be parts of your mattress that are working harder than others.

Flip or rotate your mattress

Flipping and rotating your mattress are two different things that you have to do regularly. It’s a way of repositioning your mattress, so you’ll prevent it from sagging. All of the mattresses can be swapped from head to foot. For flipping, you’ll have to check on the type of mattress you have. By repositioning your mattress, you’ll spread around the pressure rather than just using one small area.

Change sleeping position

How to Restore a Memory Foam MattressIt can also be a good idea to change your sleeping position from time to time. If you sleep on your own, then you can switch between different sides of the mattress. It can also be worth it to try and sleep on different sides of your body.

This can be hard for many people as they either have a preferred way of sleeping or move around a lot while they sleep. If you’re aware that you’re putting a lot of pressure on one particular area, try and avoid it to see if it helps.


How many years can a regular memory foam mattress survive?

As mentioned, the longevity of a normal high-quality mattress is around 10-15 years, depending on how you take care of it. If you’re following all the instructions that the manual had provided, the mattress would most likely survive for more than that. Fortunately, most mattress manufacturers can offer a 10-year warranty that can cover valid reasons for defects. Low-quality and cheaper mattresses can start to sag after just a year or so.

How thick should a memory foam mattress be?

Memory foam mattresses generally range from 6″-14″ in size. Most manufacturers would suggest that the thicker the mattress is, the longer it would last. The downsides to a thicker mattress are that they are often heavier, harder to move, and are more expensive. Often it’s worth it to spend the extra money and effort to get what you need.

How often should you reposition the mattress?

This has to depend on which type of mattress you are using and how you sleep. Around every 3 to 6 months would be a good figure. The repositioning will allow you to get better comfort, even if you’re sleeping in different positions and parts of the mattress. As mentioned before, it’s best to move the mattress before there is an issue, not after.

When should I get a new mattress?

If you’ve tried all of the above and it’s still not working, then it may be time to get a new mattress. If it’s no longer providing the comfort you need, then it’s time to make a change. When  choosing a new mattress Trusted Source Softly does it: how to choose the perfect mattress | Sleep | The Guardian It’s important to find a mattress that soothes as well as supports you. Two experts give their advice and test out John Lewis’s selection to find the best bed for a silent night , it’s worth thinking about the thickness you need, the support it has and its firmness. Once you have a new mattress, make sure you’re taking care of it and be proactive.

If you feel like getting a new memory foam mattress will be a better idea, you can stick to our experts’ recommendations. According to the latest reviews, the Layla Sleep model is one of the highly-rated picks among users due to provided comfort.

Final thoughts

Hopefully, by now, you should know all the fundamental rules on how to prevent the memory foam mattress from sagging. If you’re careful enough to take care of your mattress, then you can rest more comfortably than ever. Just like any household object, it should be looked after to keep them in good shape.

It’s only inevitable that memory foam mattresses can’t return to their original shape after many years of use. There are methods you can do to help, such as rotating, using a mattress topper, and using a more solid base. All of these can help to extend the life of your mattress.

You should now be armed with all the tools you need to know how to restore memory foam mattress and will soon be having a much better sleep.


How to buy a mattress that is perfect for you - The Washington Post
The only thing more exhausting than sleeping on a bad mattress is shopping for a new one.
Softly does it: how to choose the perfect mattress | Sleep | The Guardian
It’s important to find a mattress that soothes as well as supports you. Two experts give their advice and test out John Lewis’s selection to find the best bed for a silent night
Leave a comment

Your email address will not be published. Required fields are marked *