I live in a flat and have become close friends with the lady in the adjoining flat. We share the freehold on the property. We'd like to put a door in the studwork wall that separates our two flats. I understand this needs to be up to building reg standards with regards fireproofing. Where can I find the correct specifications/materials/thicknesses so that I can construct the door and frame in compliance with the building regs? A drawing with thicknesses indicated would be most ideal.
Thank you.
Rich