My memory foam mattress is sagging

Hi David.

Many thanks for not naming and shaming, whilst we provide honest advice we certainly don’t like to throw stones at others.

What I can say is that the mattress you have described is a very cheap low quality mattress, which is what you would expect for the amount you paid for it.

2.5cm of memory foam is too low to recover from what we call compression.

Compression will happen to all mattresses and upholstery, its when the fillings settle over time. This means that over time the foam will compress, you can’t avoid this. However, you can even out this wear by rotating the mattress and ensuring you’re using the entire sleep surface, especially with superkingsize mattresses where a ridge can occur in the middle.

With cheaper memory foam in thin layers it means once its compressed your left with pretty much nothing to work with for your comfort layer.

For the price though I’m not sure how you could get more as its pretty much on the money for that amount, I’m afraid.

Given your weight, I would always advise a deeper mattress to accommodate this.

You’ve also mentioned it now feels like porridge.

There’s a big white elephant when it comes to memory foam, that all foams are equal.

They are not.

At the cheaper end of the market, and sometimes even at the higher end, you will find memory foams are being imported from the far east which are not of the same quality as the UK made foams.

They don’t meet the same criteria, sometimes they dont meet fire regulations and the batches I’ve seen certainly don’t resemble quality memory foam.

British Vita for example are one of the UK’s best foam manufacturers and their products are of the highest quality and completely compliant.

The density and resilience of the foam is also incredibly important.

Cheaper imported foams simply are not as durable.

In terms of the guarantee I’d get in touch with the shop you bought it from online if you want to follow that route.

Usually bed retailers use a proportional guarantee, ie if found to have failed you get a proportion of what’s left of the beds life, ie if you’ve had it 2 years and its guaranteed for 5 you get 3 years proportional cost back.

We, however, don’t like this approach, our guarantee is much more simple.

If the bed fails we will either repair or replace, no mathematical equations or proportions.

Then I would buy a separate foam topper so you can replace this over time rather than the entire bed.

I know its an old adage but sometimes you really do get what you pay for.

I understand you don’t want to pay a lot for your mattress, but you need to balance this budget against comfort, maybe realising that buying cheap will lead to buying twice or putting up with the discomfort I’m afraid!

Please see our article here on the questions you should ask yourself when thinking of buying a new mattress or bed.

Hope that helps – Gary