I’ve recently noticed water in my colony, and I found that this water basin was leaking slowly. [Edit: The white tiles were built after the fact to stop the leakage. Before that the water was just contained by the natural tiles you see.]
I don’t think the game explains this at all, so I’m asking here: Which materials allow water to pass through them, and which don’t?
IIRC blocks you build just one layer, some poreus natural material like dirt at least require 2? Just build your own bricks around it if necessary