Why do mattresses sag?

A mattress sagging or sinking over time is a common problem faced by many people. Mattress sagging can have a significant impact on the quality of sleep and the overall lifespan of the mattress. There are many causes of mattress sinking, such as the weight of the sleeper, the type of mattress and the age of the mattress.

Causes and remedies

The most common cause of mattress sagging is lack of support. Over time, mattresses that are not supported can sag, especially in areas where the body presses down the most. This is especially true for mattresses that are positioned on the floor, as they lack the proper support system to keep them in good condition.

Another cause of sagging is improper maintenance. Poor cleaning techniques and occasional flipping can lead to a mattress to sag.

Fortunately, it is possible to address sagging mattresses and restore them to their former glory.

  • The first step is to ensure the mattress is supported. If the mattress is positioned on the floor, you should place it on a supportive foundation or box spring. This will help to disperse the weight of the mattress and prevent it from sagging.
  • It is also important to flip the mattress to prevent it from sinking in one area.
  • Finally, follow the manufacturer’s instructions for cleaning and maintaining the mattress in order to keep it in good condition.

By taking the proper steps to support, flip, and clean your mattress, you can help to prevent or even reverse sagging and ensure your mattress stays in the best condition possible.

How to Avoid Sagging

Even the highest quality mattress can sag. To ensure that you avoid this issue, it is important to choose the right mattress when making a purchase. Here’s what you need to consider:

Consider the size of your bed frame and the size of mattress that you will need. Pay attention to the height of the mattress as this can impact how long it lasts. The thicker the mattress, the more support it will provide, and the longer it will last without sagging.

Consider the type of mattress you will be picking up. Innerspring mattresses are the most common type, and they provide excellent support. However, they sag. Quality memory foam and latex mattresses provide better support and are less likely to sag.

Think about the materials used in the mattress. Look for mattresses that use high-density foam or latex for support and durability. Look for mattresses that have multiple layers of different materials, such as latex, memory foam, and coils. This helps to provide increased support and minimize sagging.

Read reviews from customers who have purchased the mattress you are considering. Find out what other people have experienced and how satisfied they have been with the mattress. This will give you a good idea of the quality and durability of the mattress.

Pay attention to the warranty offered with the mattress. Many companies offer long-term warranties that provide coverage for sagging, which can be a great way to protect your investment.


Mattresses sag because of a variety of factors, such as natural wear and tear, sleeping habits, and the type of material used. The weight of the person or people sleeping on them also affects mattresses, as heavier sleepers may cause the mattress to sag more quickly. To prevent mattresses from sagging, it is important to rotate them every few months, use a proper mattress for your body weight, and replace them every 8-10 years. Taking these preventive measures can help prolong the life of your mattress and prevent it from sagging.