Apparently there was an experiment on spiders spinning webs without gravity. Basically they failed to spin it correctly in space, so the researchers think that gravity may have something to do with it, or that the spiders just freaked out and weren't able to do their thing.
Then again, maybe "buildings" in space are equivalent to spacecrafts! And that is not exactly my department of study. Building in "different" environments fascinates me.. but maybe this is slightly extreme!