Hi @parcz10 , I am very glad to hear that you have tried the script. Instead of writing areas of materials, the script was designed to write a simple room schedule with materials. Whether using this script or not, I don’t think a room schedule is able to allow us writing wall materials (or other multiple materials) on multiple lines for each room. You may want to try Roombook Extension for Revit. For further information you can check the link below: Roombook Extension for Revit | Revit 2021 | Autodesk Knowledge Network
Best wishes