How to Fix a Sunken Mattress

Instead of having a flat, firm surface, a sunken mattress has a noticeable sag, with a divot in the center or off to one side. This sunken quality is a sign that the mattress needs to be replaced, but if you do not have the money or the time to do so, make a quick fix. While you will still need to replace the mattress eventually, the fix helps you get more comfortable sleep until you do so.

Things You'll Need

• Measuring tape
• Plywood
• Saw

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Instructions

1. • 1

     Remove your mattress, leaving the box spring on the frame.

   • 2

     Measure the length and the width of the box spring, subtracting 1 inch from both measurements.

   • 3

     Cut a piece of plywood that is the same size as the mattress using a saw.

   • 4

     Place the plywood on top of the box spring.

   • 5

     Place the mattress on top of the plywood. This increases the amount of support for the mattress, evening out the sunkeness.