How do you firm up a soft mattress?

5 Answers

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  • 3 weeks ago
    Favorite Answer

    Put plywood under it

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  • 4 weeks ago

    REPLACE it with a firm mattress.

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  • 4 weeks ago

    place a sheet of plywood between the mattress and box spring

    • STEVEN F
      Lv 7
      4 weeks agoReport

      You won't even NOTICE plywood UNDER the mattress.

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  • 4 weeks ago

    get a mattress toper

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  • 4 weeks ago

    Putting a sheet of plywood may help; or else buy a new mattress.

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