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Mattress rolls away from middle on sprung slatted base

Mike letford asked
22nd November 2018

We bought a bed from Dunelm Mill (I know they are not bed specialists), it’s has sprung slats.
We put a memory foam mattress on it (thin and cheap mattress), we have replaced the bed once and the mattress twice ( so three of the same mattresses and two of the same bed )the same problem has been there from the start till now.
The bed is raised up at the middle and we don’t have a clue why. Is this mattress may be just too thin and cheap, if we go for a high-end heavy mattress would this solve the problem, don’t want to replace the actual bed because of the furniture in the bedroom matches … any help or info would be great, thanks very much, Mike Letford

1 Answer
Guy Blundell
answered 5 years ago

Hi Mike Letford

Thanks for your question,

There are many anecdotes on this site and throughout the internet where the mattress develops a central dip known as ‘The Hump Back Bridge Effect’ and this can easily be attributed to the use of a slatted bed frame where the pressure of the slats (the arches) are too firm to ‘give’ under the weight of mattress and user and, therefore, the mattress is prone to settling on the central support bar.

There are of course associated reasons why this happens. The mattress itself can be so unsubstantial and lightweight that the arches on the slats are pushing the internal spring unit out of shape. The underside wadding of the mattress (one-sided no turn) has such an inadequate level of support upholstery that the springs are practically forming on to the slats.


I would advise boarding over the slats with a thin layer of MDF/PLY as shown above. This should hopefully assist with your persistent base issues.

I hope this helps, if you have any further questions please don’t hesitate to contact the office on 0161 437 4419

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