Memory Foam Mattress Sagging and 4 Solutions

Memory Foam Mattress Sagging and 4 Solutions

Memory foam mattresses are very popular in the mattress and sleep industry and for a good reason. They’re comfortable, supportive, and provide a sleep surface like no other mattress!

But they’re not without issues, one of the most common being sagging. If you’ve noticed your memory foam mattress sagging, you’ve come to the right place.

We explain why your mattress might be sagging and introduce four easy ways to fix it.

Why does my memory foam mattress sag?

Due to the fact that memory foam mattresses don’t contain springs, sagging is a common issue. But it’s important to note the difference between sagging and body impressions. 

Remember, the job of a memory foam mattress is to adapt to the contours of your body. Once you lay down on your mattress, memory foam is very effective in contouring to the unique shape of your body. 

memory foam body countour

Sagging, however, is when the mattress dips and collapses in the center. This is caused because the memory foam softens in the areas where the most pressure is applied from your body weight, when you lay down on your mattress. A mattress that is sagging becomes uncomfortable and leads to a poor night sleep. 

Here are four ways you can deal with a sagging memory foam mattress.

1. Check your warranty

Almost every memory foam mattress that you can buy today comes with some form of warranty or guarantee. Within the warranty are terms and conditions that deal specifically with sagging. 

Many guarantees are good for 2, 5, or even 10 years, so your first port of call should be to check the terms of your warranty before doing anything else. While they don’t tend to cover minor sagging issues, if your mattress has become deformed, you will most likely be covered by the warranty.

For example, the Emma mattresses are covered by the product’s warranty if a sag more than 2.5cm is visible to the naked eye. On the other hand, Simba’s hybrid mattresses covers digs and sags which are greater than 4cm during the first 24-36months of their usage. 

2. Invest in a mattress pad or topper

The easiest way to rectify a sagging memory foam mattress is to invest in a mattress pad or topper. A topper is usually 3-6cm deep, so you’re sure to feel an improvement on your sleep surface when you first start using it. 

Toppers and pads are typically made of latex or foam, so they also align to the contours of your body. While a mattress topper isn’t a permanent fix to the issue of sagging, it will definitely improve your night’s sleep in the short term.

dorma mattress topper used with sagging mattress

Shopping Tip: One very popular and affordable mattress topper is the Dorma Tencel Blend Memory Foam Mattress Topper. It is 6.5 deep and and its made of memory foam, which moulds to the shape of your body.

Plus it comes with a Tencel blend cover, which is known to regulate body temperature. The topper itself comes with a 10 year guarantee and is priced at £139-£219 (single to super king size). 

3. Change your bed frame

For a memory foam mattress to be effective, it needs to be placed on an even, durable frame. There’s little point investing a significant amount of money in a brand-new mattress, only to place it on top of a damaged bed frame!

Ideally, you should be using sprung slats instead of solid slats, with a memory foam mattress. This is because they are slightly curved or arched upwards, and will add an additional “boost” or support to your sleep surface. 

Also, make sure that the distance between the slats (regardless if they are solid or slats), is not greater than 7.5cm or 3 inches. If you see that one or more slats are broken, make sure you replace them with a new one.

sprung slats for memory foam mattress

If your frame is damaged or old, consider investing in a new one. Alternatively, add more support to your mattress by filling the gaps in the slats where your mattress dips through.

4. Rotate your mattress

If you’ve had your mattress for a while and haven’t flipped or rotated it, make sure you begin doing this regularly. First make sure you check if your mattress is single sided or double sided. 

If your mattress is single sided, that means that you can sleep on only one side of it. You can only turn it clock or counterclockwise (don’t flip it over). On the other hand, double sided mattresses allow you to sleep on both top and bottom sides of the mattress. This means that you can turn it and flip it over. 

Some brands recommend that you rotate your mattress at least once every three months. If you haven’t done this until now, then make sure you do so regularly. Since mattresses are quite heavy, ask for a helping hand to make things easier. 

Again, this isn’t necessarily a permanent solution to the issue, but it will at least prevent the memory foam mattress from sagging in the same place every time.

Ultimately, a sagging memory foam mattress is far from ideal. But the four quick fixes above show that you can almost always do something about the issue, so you don’t have to sleep on a dipping and sagging mattress that will almost certainly cause you back and joint issues in the long run.

Invest in a new mattress

If ultimately you’ve tried all of these things, but there wasn’t that much improvement, you can consider buying a new mattress. However, this time look for a mattress that comes with a free trial.

In some cases the trial can be 100, 200 or even 365 days, which means that you have half or even one full year to sleep and test the mattress at the comfort of your own home. If you notice any problems with it you can return it for free and receive a full refund. 

Also, consider investing in a pocket spring or hybrid mattress next time, since it will have a layer of pocket springs inside. Some pocket springs are made of steel and are known to be very strong and supportive. Make sure you check the number of pocket springs, since their number can range around 400-2,500 depending on the model and size. 

For example, the Annison Pocket Sprung Mattress by Dreams has 667 pocket springs in the double size, plus a layer of memory foam on top (see picture above). It is one of their bestselling mattresses, with an excellent 4.8/5 star rating from over 3,700 customers.