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Does Memory Foam Sag with Time?

Does memory foam sag with time

We all love to soak into our bed with a memory foam mattress and can’t also deny the warm marshmallow feeling during winter. But as time passes, you start to notice your beloved mattress isn’t going back to its standard shape. You must be wondering if it’s normal or if there is something wrong with your mattress. Well, let’s find out the reason behind this problem,

Does memory foam sag with time?

The answer is, “Yes, they do.” Memory foams are made of memory foams and springs. Now, memory foam is an incredible thing. It can mold into your body shape, which gives a feeling of soaking into your mattress peacefully.

Memory foams are dear to people who sleep turning on their side as they can work as a big pain reliever because it nullifies any pressure points. Memory foam can also trap heat, making them even more desirable during winter. It can also reduce motion sensation, which is best for people who sleep together. So no more waking up from sleep just because your partner moved to scratch his butt!

All these comforts, but not for so long as memory foams, are known to have less duration. Memory foam remembers your shape and will come back to the average level. But by that time, it will take longer to come back to its actual shape, known as sagging. As the foam is bearing your weight, it’s only normal; the elasticity will fade over time.

What makes memory foam sag with time

You must have guessed the main reason behind this, but did you know there are other factors? Take a look at what more reasons can there be for the sagging of your memory foam mattress:

Improper base: Your memory foam mattress won’t be able to perform its best unless you use a proper foundation with it. The mattress can dip before it’s time if you don’t get a base that supports memory foam the best. A slatted foundation or solid base foundation is best for supporting memory foam mattresses.

Box springs are not a good choice for a memory foam mattress. Memory foam mattresses need to be placed on top of a close-set slats platform. If your platform is not closely slatted, you should consider buying extra slats to improve your base for memory foam mattresses.

Remember that your slats can’t be far from more than 3 inches from each other. You can also use modern platform beds for extra decoration and built-in drawers, but keep the 3-inch rule before choosing.

Low-quality support: Memory foam mattresses are not made of only memory foam; there are comfort and support layers that are the thickest. Also, there is a transition layer in between the comfort and support layers.

All these layers play a role in holding and balancing the memory foam layer. These additional layers are the indications that the mattress is firm and durable. So, check if your mattress contains multiple layers. If not, then add a mattress topper to prevent premature sagging.

Lack of care: Your mattress needs care as well. Vacuum it regularly and thoroughly to get rid of dead skin cells, debris, or dust.

Body pressure: Your body weight creates constant pressure on almost the same spot every day. Eventually, a few mattress spots will look dipped, which is known as sagging. If you are putting more weight on yourself or with your partner, you need to consider the thickness of the mattress. If you are using a thin layered mattress but putting more pressure, your mattress will sag in no time.

Poor weight distribution: Your mattress can sag at one spot just because you sleep in the same spot daily. It would help if you considered changing your position to avoid sagging at a single spot. This will also help to put pressure evenly throughout the mattress.

Don’t miss out on the warranty!

Don’t just buy a mattress and forget about everything else about it. Check if it contains any warranty because it can save you money from changing your mattress. There is no need to use a sagged mattress when you have a warranty.

If your mattress starts sagging before the warranty is over, go ahead and demand a free replacement from the shop you bought it!

How to stop memory foam from sagging with time

Good quality memory foam can last up to 7 to 8 years. After that time, they will eventually start to sag because nothing is permanent. But we can at least try to make it last till its effectiveness expires. Let’s take a look at some tips:

Time to flip the foam: One of the primary ways is to flip or rotate your mattress simply. In this way, you will put pressure on a different mattress area that hasn’t sagged yet without changing your sleeping spot.

Add an extra layer on top: Adding a support layer on top can lessen the pressure created on the mattress. It can increase the durability of your mattress.

Check your bed frame: Follow the 3-inch rule and invest in getting a good bed frame with proper slat difference for the longevity of your memory foam mattress.

Change your spot: If you find it hard flipping or rotating your mattress, simply change your spot. Sleep in different spots alternatively.

A more extended warranty is a wiser choice: Needless to say, you should look for a brand warranty no matter what you buy. The more extended the warranty, the better safety you get because you wouldn’t need to buy a new one if your mattress starts sagging while your warranty is still valid. You can quickly get a free replacement.

Caring is the key: Take care of your sleeping buddy, too. We all adore the soft feeling of our memory mattress, but to keep this luster for a little longer; you need to keep it clean for excellent performance.


When we buy a memory foam mattress, it feels like the bed is the most peaceful thing ever, but the charm starts to fade with time. It could be because of the mattress’s quality itself or simply because you aren’t aware of a few tips. The longevity and firmness of a memory foam mattress will be protected if combined with some good habits, ideas, and care. Give it a try at any of our suggestions and see the difference!