filsketeer

If you'd like the server files I can upload them somewhere for you? I just tried placing a new wall and the same issue, leaking roof.

What do you mean by a wall segment? The wall in the bottom right of the video is new to the building, however i can try adding another wall? I built a square building for testing in a different part of the map (Southern-most gas station parking lot in muldraugh) and had the same issue.

Updated server to 40.30, rain was passing through roof of entire building. Deleted the entire roof and replaced it, no more rain passing through. Extended the building but did not do the roof, and logged out for a bit, came back and now i cannot place "waterproof" roof anymore. Water passes through regardless of whether build cheat is used or not (i originally roofed a large portion of the new extension without cheat but when i saw it wasn't working went into experiment mode) Have tried restarting server, closing/reopening client, different admin account.