This seems irrelevant because of the fact that copper is very SOFT in real life, reason why it is so valuable in the real world, so Zombies could break the door but I do agree on the fact that copper doors should not make a wood door breaking sound.
This seems irrelevant because of the fact that copper is very SOFT in real life, reason why it is so valuable in the real world, so Zombies could break the door but I do agree on the fact that copper doors should not make a wood door breaking sound.