I get how it works. You start off with all wooden barrier's then when you have the steel bars perk, you yourself barrier up with the steel barriers, so you would really need them to be all ripped down and put up by yourself to have all steel barriers. It work's on everything that can be barricaded.
Originally posted by D.C.A
It works on anything that can be boarded up, even the bus. the real question is: what happens if the person with this perma perk gets a carpenter? does it board up everything with wood or metal?
It depends if you have the perk it will board up with steel, if not wood.