How to repair a sagging sofa

Written by jennifer painter
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How to repair a sagging sofa
(sofa image by Greg Carpenter from

Has your ageing sofa started to sag? Do you sink a little bit too close to the floor when you lounge in your living room? If you do not have room in your budget for new furniture, don't worry: You can repair your sagging sofa. Follow these steps to find the reason for the sag and bring new life to your sofa.

Skill level:

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Things you need

  • Plywood
  • Firm foam padding

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  1. 1

    Remove all cushions from the sofa.

  2. 2

    Inspect the frame of the sofa. If there is broken or rotten wood in the frame, it must be reinforced or replaced with new wood and screws.

  3. 3

    Examine the areas where the seat cushions sit. If there is sag due to compressed springs or a broken platform, cut a piece of sturdy plywood to fit the area. This new platform will support the seat cushions and prevent sag.

  4. 4

    Test the suppression of the fill in each cushion. If the cushion is too soft, or if you can significantly pull the upholstery from the fill, then fill needs to be added to the cushion. Unzip the cushion and add a piece of firm foam padding to the top and bottom sides of the cushion.

  5. 5

    Replace the sofa cushions.

  6. 6

    Sit on your revived sofa and test for remaining sag. Repeat steps 1-5 if sag still exists.

Tips and warnings

  • When adding foam padding to the cushion fill, cut one piece to fit the entire seat surface of the cushion, to smooth the appearance of the seat and prevent lumps.
  • If the sofa cushions are lumpy or the cushion fill is significantly deteriorated, consider removing the old fill and refilling with layers of firm foam padding.
  • If the sofa cushions do not have zipper access to the fill, you can cut a slit in the rear of the cushion upholstery, add the new fill and then sew the cushion closed.

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