walls in the airlock

Hi Guys Designing the airlock between the control room and live room and would welcome some input on the wall design . . I am wondering if i need to build the airlock as another room within a room to maintain isolation? In other words is the blue wall necessary in the attached pic or can I simply cover the fibreglass insulation inside the airlock with fabric . . comments most welcome . .Thanks

Why do you need an airlock like that? Unless you plan to use it as a room (eg: iso-booth), then there is no need. Far better to save space and just put the two doors back to back. And if you do want to use it as an iso booth, then you need four doors, not just two... - Stuart -