Barbs

does anyone know when are barbs using their resources to grow?....is it a specific time or will they upgrade a house whenever they have the specific resource for building a house? and is it like normal players queueing buildings or they are building instant like at MoL case?(sorry for my grammar mistakes, english is not my first langauge)
 
nobody really knows how barbs work. If i had to guess... might upgrade on an hourly schedule. and most speculation points to res not affecting growth.
 
of course this is entirely speculation inno won't tell you how the game works (they probably don't even know themselves)