How To Fix A Sagging Memory Foam Mattress

Last Updated June 30, 2023

Is your memory foam mattress starting to sag? If you’ve had your memory foam mattress for 10 or so years, it’s probably nearing the end of its lifespan. You might need to invest in a new mattress, or you could buy a mattress topper as a cheaper option to keep it going for a little while longer. However, perhaps your memory mattress is only a couple of years old and starting to sag – then what? If it’s still under warranty, you might be able to get it replaced, but sometimes the warranty doesn’t cover sagging. Don’t worry – the sleep experts here at have a few tricks up their sleeves to fix a sagging memory foam mattress in no time.

Why is My Memory Foam Mattress Sagging?

Some of the reasons why your memory foam mattress is sagging could be due to:

  • Frequent use
  • Placing the mattress on an uneven surface
  • When the inner component disintegrates due to the aging of the foam
  • High moisture content
  • Inadequate care
  • No proper mattress foundation
  • Too much weight

Preventing Sagging of Your Memory Foam Mattress

If you want to prevent your memory foam mattress from sagging, you need to look after it properly (sorry, we probably sound like a pestering parent!) Avoid excessive liquid, moisture and spills getting on the mattress by using a waterproof protector.

Another way to prevent your memory foam mattress from sagging is to rotate it often. Memory foam mattresses morph and shape your body, so you must keep changing the position of the mattress, so it doesn’t get stuck and sag in one position.

Also, if you’re worried about sagging, always choose a firmer foam mattress. High-density foam mattresses won’t sag as easily, and they provide more support. And remember: a memory foam mattress made of quality materials, that comes with a sleep trial and a generous warranty will rarely sag on you.

How to Fix a Sagging Memory Foam Mattress

1. Rotate and Flip Your Memory Foam Mattress

Rotating or flipping your memory foam mattress is one of the oldest tricks in the book but it works! We recommend flipping the foam mattress once a month to achieve evenness throughout while preventing sagging in a specific area.

Rotating the mattress is also another option to maintain proper wear all around the mattress. All it involves is rotating the head and foot of the mattress.

2. Invest in a Foam Mattress Topper

A mattress topper is probably the best way to fix a sagging mattress and will offer the most comfortable results. While the topper won’t fix the sagging permanently, it will help make the sagging less noticeable. Here’s our guide to the best mattress toppers.

3. Buy a Firmer Foam Mattress

This option is, of course, a more expensive option, but if you invest in the right mattress it should last you at least a decade. With a firmer foam mattress, you are less likely to experience sagging or dipping since it’s high-density foam. A firmer foam mattress of 10-12 inches or more can withstand considerable weight or pressure for a longer time, which will lead to a lot less sagging over time.

4. Buy a Better Bed Frame

Your bed frame could be the reason for your sagging memory foam mattress. You need a support base to prevent sinking in the middle of your memory foam mattress. You can also use a cardboard or plywood base to fix the problem. While it may not be a long term solution, it helps fix the issue in the meantime and prevent further sagging. Patch the overall area experiencing the sinking.

Final Thoughts

We hope these tips have helped you make your sagging memory foam mattress firm again. If you have any additional questions, please get in touch. We’re more than happy to help!

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Ally Burnie
Head Dreamer Ally Burnie
Journalist, presenter and host based in Sydney with a passion for cooking, outdoor adventures, hiking, humanitarianism, and travel.
Ally Burnie Head Dreamer Ally Burnie
Journalist, presenter and host based in Sydney with a passion for cooking, outdoor adventures, hiking, humanitarianism, and travel.


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