How to rotate a mattress, how often, and whether to flip it

A mattress wears where you sleep. Rotating it spreads that wear across the whole surface, which is the difference between a dip in year four and a level mattress in year eight. It takes two people and five minutes, and almost nobody does it. Here is how, how often, and when not to.

Rotate versus flip

Rotate means turning the mattress 180 degrees, so the head end is now at the foot, and the same side stays up. Every mattress can be rotated.

Flip means turning it over so the underside becomes the sleeping surface. Only two-sided mattresses can be flipped: traditional builds with the same comfort layers on both faces. Most modern mattresses are one-sided, with the comfort layers on top and a base foam underneath, and flipping one puts you on the base. Check the label: "no-turn", "one-sided" or "rotate only" means do not flip.

How often

The first year matters most, because that is when the comfort layers settle and the body impression forms. Four rotations in year one is the whole job.

Why it matters

A couple who each sleep on their own side compress two patches of the comfort layer every night. Rotating swaps the patches, so each is loaded half the time and the middle gets a turn. For a single sleeper it is the same principle with one patch. Without it, a memory foam or fibre comfort layer takes a permanent impression where the hips lie, the rest of the mattress stays firm, and by year four you are sleeping in a shallow dish surrounded by a ridge. Rotated, the same mattress is level.

It also spreads edge wear: the side you sit on to get up becomes the other side.

How to do it

1. Two people. A king mattress weighs 35 to 60 kg and is floppy; one person can do it but should not.
2. Strip the bed.
3. Lift one end and slide the mattress a third of the way off the foot of the bed.
4. Pivot it 90 degrees on the base so it lies across the bed.
5. Pivot another 90 degrees, so the old head end is now at the foot.
6. Slide it back square on the base. Check it sits inside the frame all round.

Do not fold it, do not stand it on a corner, do not drag a pillow-top by the top layer (lift by the border or the handles).

Make it happen

The reason people do not rotate is that there is no trigger. Put it in the phone calendar for the first four quarters, or stick a card inside the wardrobe door with the four dates. We send a rotate-reminder sticker with every mattress and an email at each of the four dates in the first year, because it is the single cheapest thing that makes a mattress last.

What rotating will not fix

A dip that is already there. Rotation moves the dip to the foot of the bed, where you will feel it under your calves. Nor will it fix a soft edge or a failing base. If the mattress has a hollow over 2.5 cm, that is a guarantee claim or a replacement, not a rotation. See six signs a mattress is done.

How ours work

Every Chapter mattress is one-sided: rotate head to toe, never flip. The Hotel Bed's pillow-top is stitched separately and rotates with the mattress. The rotate sticker is in the pack and the reminders come by email at three, six, nine and twelve months.

The short version

• Rotate every three months in the first year, then every six.
• Flip only if the mattress is two-sided; most are not.
• Two people, pivot in two quarter turns, lift by the border.
• Put the dates somewhere you will see them.