How To Fix A Saggy Mattress? – 4 Easy Tricks

Are you wondering what you should do with a saggy mattress? 

Aren’t you aware of the causes that increase the sagging rate of a mattress? 

If it’s a yes to the above questions, then you have landed yourself at the right place! 

Even though a mattress bought feels amazing to sleep on, the same can’t be said when it comes to a year old mattress. Just like your age, the mattresses also get old and suffer from both external and internal damages. One such damage is the sagging of the mattress, where the mattress surface is depressed below the actual level. 

Sagging is irreversible, but it can be fixed if you know the correct way to do it. As mattresses are quite costly, it is completely absurd to buy a new product when your existing mattress has sagged. So, the ultimate option that you are left with is fixing a sagging mattress which we have described further in this article. 

What causes sagging in a mattress? 

Most people are unaware of the exact reasons for the sagging of a mattress. And that’s why they don’t take any measures for preventing the damage in the very first place. Hence, this section will discuss the major reasons a mattress suffers from sagging over time. 

  • Constant pressure from the above at specific places speeds up the softening process of the underlying foam layer. And as a result, those particular areas sag more than the surrounding ones. 
  • Due to body heat, foam materials can easily soften, which further increases the sagging rate of the mattress. 
  • Sudden impacts on the surface of a spring mattress are another reason the spring mattresses suffer from this damage. 
  • Sleeping at the centre for days causes this particular portion to sink compared to the edges, creating a slope on the mattress’s surface.

How to identify a sagging mattress? 

Sagging is internal damage, and most people cannot identify it until it’s too late to fix the damage. So, you need to know the proper way of identifying whether your mattress has sagged or not. And if it has sagged, then you should measure by how much because a sagged mattress can be fixed only when sagging is present to a certain extent. 

  • First of all, remove any bed sheet, mattress cover, protectors, pads, and other such coverings. 
  • Take a long stick and make sure that the stick’s surface is plain and smooth. You can ensure it by placing the stick on the ground and checking for gaps. 
  • Once you are certain, place the stick along one edge of the mattress slowly and allow it to rest in that place only. 
  • After you are done, check whether there is any gap between the mattress surface and the stick. 
  • If a gap is present, it means your mattress has suffered from local sagging. However, if the entire mattress surface is below the stick level, it is a centralized sagging. 

How is the sagging rate related to different materials used in mattress manufacturing? 

The sagging rate of a mattress varies from one product to the other, and it is mainly dependent on the material type used in the core layer. For example, a PU foam layer suffered maximum sagging as compared to other foam types. This is because a PU foam is extremely soft and cannot resist the impacts much. Similarly, latex, HD foam, and spring coil layers are the best materials with the lowest sagging rate. 

In what ways can a sagging mattress be fixed? 

You can easily fix a sagging mattress only if you follow certain rules properly. Unless you follow the rule, it will become quite difficult for you to fix the mattress and repair the damage. This section will explain the best ways by which fixing a saggy mattress will become much easier for you. 

1. Flipping the mattress 

Suppose you have a double-sided or dual comfort mattress. In that case, you can easily reduce the sagging rate by flipping the bedding now and then. Usually, in such mattresses, one side is firmer as compared to the other. This is why you can easily flip the mattress to ensure that the mattress surface on the top has the right firmness, which your body needs for comfortable sleeping. 

2. Rotating the mattress 

Another major way of fixing a saggy mattress is by rotating it to distribute the pressure applied on the surface evenly. This will reduce the sagging rate and ensure that your weight is spread out evenly on the mattress. You can implement this trick for mattresses that do not come with dual surfaces.

3. Using a mattress pad

One of the amazing ways by which you can easily reduce the sagging rate and prevent any further damage is by using the mattress pad. A mattress pad is a top protective layer that will help absorb the impact forces and reduce the sagging of the mattress layers. In addition, you can add more comfort to the bedding and alter the firmness as per your need. 

3. Placing a plywood 

If the bed’s frame is not flat and properly levelled, the sagging rate of the mattress will be more. This is why you can place plywood between the mattress’s lower surface and the bed frame. The plywood will help reduce the sagging rate and provide a flat surface on which you can sleep comfortably without worrying about damage to the internal layers. 

4. What to do if It can’t fix a sagged mattress? 

If your mattress has sagged too much beyond the limit, you need to replace it with a new one. Sleeping on a sagged mattress is quite detrimental to your health because the softened foam layers will not support your body properly. Hence, you will suffer from back pain, sore muscles, and discomfort. If you do not want to buy a new mattress, you can use a thick mattress topper that will act as an extra bedding layer. 


In this article, we have explained everything you need to know about a sagging mattress. If your mattress has started sagging, you can implement any of the ideas we have explained above to adjust the firmness and reduce further damage to the internal foam or spring layers. 

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