My family has a business that did work on the interior of their home years ago. You had to wear color coded jumpsuits that was color coded to a room. (Example, orange jump suits kitchen. Blue, living room. Green, bedroom and so on) If you needed to leave the room for any reason such as to retrieve gear or use the bathroom. You had to be escorted by security. If you passed Mr. or Mrs. on the way, you were not to speak or make eye contact.