Barbamaus wrote:if I build a brick wall just inside a palisade, without gaps, what happens when someone tries to demolish the palisade? Does the damage spread to the wall too?
Damage only spreads through wall sections connected to each other. It'll spread along the palisade, but not into the brick wall. If you have two palisades and they are not connected anywhere, damage won't spread.
A lot of people leave the palisade to protect the brick wall while it is being built, if that's what you're planning.
Catapults are the preferred method for making holes in walls in sieges, so if the walls are close enough together, all walls in the hit area are going to take damage, anyway, and there is a possibility of both walls breaking at the same time. During regular periods, wrecking balls are used; or if people think the wrecking ball won't or can't get destroyed.
I'll note that this is my understanding of the mechanic. The devs don't share much on this with us, so specifics sometimes don't get shared when they're discovered, and I'm going on what I've last read on the forums.
Opinions expressed in this statement are the authors alone and in no way reflect on the game development values of the actual developers.