How to Fix a Sagging Couch

Sagging Cushions

• 1

  Measure the length, width and depth of the couch cushions, making sure to account for the extended L-shaped portion on the front of each side cushion.

• 2

  Unzip the cushion covers. If the cushion does not have a zipper, carefully open the seam at the back of the cushion with a seam ripper.

• 3

  Stuff the cushions with additional pieces of foam or cotton batting to increase the firmness of the existing foam, and then zip or stitch the cushion cover closed; add the stuffing to the bottom side of the cushion to reduce visible lumps. If the existing foam is extremely worn or sagging, then the best option is to replace the cushion entirely.

• 4

  Pull the old foam out of the cushion cover if total replacement is the preferred option. Try to keep the foam in one piece.

• 5

  Place the old foam stuffing on top of a new piece of foam in the desired density and thickness. Trace the outline onto the new foam with a marker or, if you prefer, draw the shape based on the measurements of the cushion.

• 6

  Cut the new foam at a 90-degree angle with a knife or electric knife.

• 7

  Pull the cushion cover over the new piece of foam, zip or stitch it closed, and then put it back in place on the couch. Test the newly stuffed cushions to confirm that you've solved the problem.

Sagging Springs

• 8

  Remove all cushions from the couch, and then pull up the thin cloth covering over the springs. Inspect the springs for any that are overly compressed or bent out of shape.

• 9

  Remove compressed or bent springs from the couch with a pair of pliers. The coils may be bent into place on the frame or installed with a clip.

• 10

  Bend or stretch the springs back into place with the pliers. Use a second pair of pliers, if necessary, to hold and manipulate the metal.

• 11

  Replace the springs and test the couch to see if that fixed the problem. If more than a few of the springs have damage, it may be best to reinforce the couch above the springs, as in the next steps.

• 12

  Measure the area of the couch where the cushions rest -- the space between the arms and the back of the couch.

• 13

  Cut a piece of 3/4-inch plywood to fit the measurement. Round the corners of the plywood when cutting to avoid leaving sharp corners that may rip the couch fabric.

• 14

  Sand the edges of the plywood to create a slightly rounded edge that decreases the risk of tearing the fabric.

• 15

  Staple cotton batting and fabric over the plywood, if desired. This provides a bit of extra padding and allows you to choose a fabric that blends with the couch fabric.

• 16

  Slip the plywood into place on the couch, and then cover with the couch cushions. Sit on the couch to ensure that it no longer sags.