How to Replace Coil Springs in a Chair

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Replacing the coil springs on a chair is harder than many people realize. To prevent the springs from bouncing out of place and causing damage to the sofa, it is necessary to tie the springs into place using a complicated series of knots and ties. However, this is the hardest part of the replacement. The rest of the process is fairly simple. This procedure should take about one day to complete.

Things You'll Need

  • Scissors
  • Flathead screwdriver
  • Wire cutters
  • Replacement figure 8-shaped coil springs
  • Pencil
  • Thread
  • Needle
  • String tying cord
  • Measuring tape
  • Edge wire
  • Fabric
  • Remove the old springs from the chair. This may involve cutting away old fabric and batting to expose the springs under the chair with scissors or a flathead screwdriver. Remove the old springs with wire cutters, but leave the main metal frame on the chair. Remove all threads, batting, fabric strings and metal attached to the chair frame.

  • Assemble the appropriate number of springs. Most chairs use between three and 12 springs for the bottom of the chair. Count the original springs to tell how many new springs you will need, or you can eyeball it. Place the springs in straight rows across the bottom of the chair, filling up the majority of the frame. The springs should sit at the same height as the top part of the metal frame.

  • Line up the springs like you want them to sit inside the frame. Mark the placement of each spring with a pencil. Remove all springs but one. Sew the springs to the bottom webbing, one at a time with thick thread. Sew the springs to the webbing on the four outside edges for greatest stability.

  • Measure the length of the strings across the bottom of the chair. Cut a piece of string to equal four times this measurement. Tie each spring to the edge of the frame and each spring next to it.

  • Use a pretzel knot to tie the string from top to bottom, from side to side and diagonally from left to right and right to left. Place the end of the string on top of the spring. Loop the string up under the spring and back around the top side. Repeat once more to make a pretzel-shaped knot. Pull tight, then move the string to the other side of the spring. When all sides of the spring are tied in place, continue the string to the spring next in line.

  • Tie the edges of the springs touching the metal chair frame to the frame with edging wire. Use at least 10 wraps of wire per spring edge for greater stability. Cover the springs with fabric and staple into place.

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