Do I have to be a registered installer of glass to fire doors
There is currently no legal or statutory requirement to be certified to glaze fire-resisting doors.
However, it is recommended that anyone undertaking this type of work attends an appropriate training course specifically on glazing, or at the very least a general course that outlines the construction of these performance products.
Attendance will also help provide evidence that the installer is competent. (Suitable third-party certification can be obtained from a UKAS-accredited certification body).