How to Get Rid of a Sag in a Mattress

If your sleep is suddenly less than satisfying, a saggy mattress could be the culprit. Over time, certain mattress types develop a sag, especially if they're not flipped regularly to spread out the stress that's exerted on the springs and padding. Mattress manufacturer Serta lists a few causes for sagging mattresses, such as an improperly sized bed frame; a bad center of support, which is where sagging tends to occur most often; or a damaged frame or box spring.

Mattress bladder
Memory foam
Scissors
Thin blankets

Instructions

- 1
  Purchase a mattress "bladder," which is an inflatable bubble that resembles a large, flat pillow. Pump up the bladder according to the manufacturer's instructions. The bladder pushes up against the sag, raising the valley to the mattress's level. The bladders are available in home goods stores.
- 2
  Buy a piece of memory foam -- available at department stores -- that's slightly larger than the size of the sag. Cut a piece of memory foam so it slightly overlaps the sagging area. Put the memory foam between the mattress and box spring to raise the sag.
- 3
  Flip the mattress over so the valley of the sag is now on top of the mattress. Fold two to three thin blankets in the approximate shape of the sag, and position them between the box spring and mattress. Test the bed for comfort, and refold or add more blankets as necessary until the sagging area is level.
- 4
  Inspect the box spring for signs of distress. What feels like a saggy mattress could be a box-spring problem. Add more supports, if necessary, or consider replacing a worn out or broken box spring.

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