Concrete and spawns?

[patfly]

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.

[Bushdoctor]

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.

[patfly]

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

[Bushdoctor]

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!