About Extrusion
The extrusion is the plastic track your curtains glide on. It is clipped into the routed grove in the melamine board the tracks come built into. In some circumstances after well over 10 years of use, the extrusion can become more vulnerable to cracking if excessive force is used on the curtain. If your extrusion is cracked and your curtains keep falling out, below are the instructions to replace it yourself, this procedure can be done with the tracks still on the wall.