Factorio Forums

Can the bugs build nests on concrete? I've dug around in here and can't find an answer.
Any help would be great, thanks.

Yes they can. Their settlements can appear right on top of concrete.
I had the same question a while ago and did some tests which showed that result.

Cruddy, there goes one idea. Thanks for the reply.
Guess I'll just have to kill all of them, No?

If you want to keep a specific area clear, you almost have to wall it off.
A temporary measure is to leave one or more gun turrets at the spot where you cleared a nest. They have a tendency to pick the same spots.
But yea.. gear up and flame them to kingdom come!