Bunker Builder Australia, Prepper Add comments May 062018 Anyone in Australia ever built and back yard bunker with an air filtration system? One Response to “Bunker Builder” Prepper Down Under says: June 3, 2018 at 4:07 pm GDay BB, Kev from Canberra. Havent built a bunker but been thinking of putting one in a shed at my retreat for security as I am not there much. There is a crowd in WA who prefab them but it would cost a fortune to get one here. If I do it I’ll probably just pour on site myself – I can do most things if I think them through. Where are you? Cheers, Kev. [email protected] Log in to Reply Leave a Reply Cancel replyYou must be logged in to post a comment.