I've been trying to find out the regulations for making stained glass internal doors.? I want to design and make my own leaded stained glass french door window panels.? Each pane will measure 16" x 14" (406mm x 356 mm) there are 4 windows in each door (two doors).? I am obviously concerned about the safety aspects as I do have a young son.? Most stained glass that I have worked with is? 2-3mm thick.? Is this going to be a problem?? Your advice would be most welcome. Thank you.? :