I'm not really sure if the "safe" part will last long...unless there is a zombie with muscles and a little part of brain left to try to open the doors...or they wil start eating the door...or Ivan will do something stupid like...opening the door...
GET A BICYCLE AND A CROWBAR AND GO TO THE NEAREST PORT!!
Fluffe from youtube already predicted...the best stuff you can have in a zombie apocalypse...a bicycle...and crowbar
WE ARE ALL CRAZY, EVEN IF THINK YOU AREN'T THAT MEANS YOU ARE!