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We're commonly asked how often should you change your mattress. We recommend replacing a mattress once every 8 years to get the best and most hygienic night's sleep. However, this can vary depending on the comfort and support offered by your mattress.

Our Replace Every 8 campaign runs through the science behind your mattress' life span and how to spot when it's ready for a new one.

Why do you need to replace your mattress every 8 years?

In total you spend about one third of your life on your mattress, so it plays a big part in your general health and well‐being, not to mention your day‐to‐day energy levels, alertness and mood. Both the mattress industry and the Sleep Council strongly recommend that you replace a mattress every eight years, because by this time it will have lost much of its original comfort and support.

Old and worn mattresses can also provide welcome accommodation for allergens, dead skin cells, dust mites, germs and even bedbugs. This can happen even if you wash your sheets regularly. For example, a mattress that is 10 years old could be housing up to 10 million dust mites, so it might be time to change your mattress before it gets to this point.

To learn more about the science behind your mattress, we've created this infographic: What Happens to Your Mattress Over Time.

How do you know if you need a new mattress?

If you wake up in the morning with stiffness, or aches and pains it could be that your mattress isn't providing the level of support and comfort it needs to. If this is the case, it might be time to replace your mattress regardless of how old it is. Also, if you're sneezing more than you're snoozing this may be because of the allergens collected in your mattress, this might be time to consider changing your mattress.

Is your mattress showing signs of wear and tear?

Another tell‐tale sign is if you can see a visible dip in the middle of your mattress, or if you can feel the springs through it. This is definitely time to change your mattress. The same goes for a noisy mattress too. If it's creaking, groaning and pinging all night long, then it's obviously not in a sound condition.

Is your mattress coping with changes in your body?

If you're a couple of stone heavier, or even lighter, than you were a few years ago, it's possible that your body could have changed to the extent where your existing mattress is no longer comfortable. This also applies to children's mattresses, which can't adapt by themselves to the growing demands of kids.

Is your mattress keeping your partner awake?

An ageing mattress doesn't reduce motion transfer like it should. This can cause big problems in a shared bed by waking someone up each time the other person moves. A good mattress needs to support both sleepers in equal comfort with minimal motion transfer.

How often should you get a new bed?

Another thing we're commonly asked is how often should you buy a new bed. This is not as pressing an issue as your mattress, as it does not directly affect your comfort overnight. Bed frames also don't have an expiration date and can be used up until a slat breaks or you fancy a design change.

How often should you change your bedding?

Finally, it's important to look at how often you wash your bed sheets. Leaving dirty bedding on your mattress for a long time can result in more dirt and dust getting through to your mattress, which significantly reduces its lifespan. Therefore it's best to wash your bedding once every 1‐2 weeks.