Yes, it is easy to retrofit an existing curtain with an automatic curtain opener as it can be installed on an existing curtain. There is no need to replace an existing curtain. Somfy helps you achieve this goal with the help of curtain motors & tracks. Whether you have a traditional, wavy or pleated curtain, you can make use of a curtain motor & track, and it can be used for all 3: left, right & centre opening curtains.