Known issueFixUpdated · 3 replies on Steam
Fallout 76: Having an Issue with Flooring/interaction with an "Existing Item" (Workarounds)
Short answer
Suggested fix (unconfirmed): Place a troublesome section somewhere it will place, blueprint it, and then scrap or store the template. Alternatively, use free camera mode from far away to find a sweet spot, or snap floors to existing ones to bypass placement issues.
The problem
trying to place a floor (second story) into a corner of and near a rocky area. granted it goes through the rocky area but not by much. the thing is when I do a normal floor tile it gives me a "existing item" error. though when I put down .5 x 1 and I do two of them no error happens. from what I understand the game will just place the 1x1 item and allows the extension through the wall to make up…
What players suggest
It's a POV problem. try moving around in free mode to find the sweet spot that lets you drop a full floor down. Most of the time it's you in the way tbh. Move your char way away from the targeted build area and use free mode to place it. It's almost always that I'm too close to the item that I'm trying to place.
Did this work for you?
Source: original Steam Community discussion. Quotes are shortened; all credit goes to the posters.