Factorio Forums

Good day,

Does concrete stop alien buildings from spawning?

Thanks.

While an interesting question, it's mostly pointless as almost nothing stops them from migrating.

You can check it yourself through the debug options.

the best defence agains new biter bases are turrets

debug option! didn't think of that. Thanks

Gotta put down a bit more for a decent test, but concrete doesn't seem to turn the green circles to red.

-Edit-
Nope. Just had an entire alien village spawn on top of my concrete slab.
Dang.