I am at the stage of planning my new dark room. I will be dividing up my garage to give me a 8x10ft space. I plan to stud partition, insulate then dry line. with plenty of power. It is a standard UK garage and the question I have is. I plan to only have 1 entry into the space. (the current internal garage door. Access to the rest of the garage will be through the main up and over door) Do I need to build a second door as an escape route ?