How to add onto a building?

[Chilled Legumes]

I'm having some difficulties with adding onto a building. Lets say i have an existing building that I want to add another room on the side to. If i create just walls, its not considered "inside". I try to lay down flooring, but the tile selection is red.

The only option it seems is to lay down foundation. However, this destroys walls that already exist, and then i have to rebuild them. This is a pain normally, but especially if i am expanding a cell block, i dont want the walls to cells containing prisoners to be destroyed, lets we have a break out!

Is there a proper way to do what I'm trying to do, or do i just have to contend with the walls being demolished?

[Jet City Gambler]

It won't demolish the walls if you place the new foundation next to your existing building, it will only demolish the walls if you place the edge of the new foundation over the existing wall.

[SeikakuOtosan]

as was posted above, also if at some point down the road you want to demolish those interior walls

dont use the bulldoze tool, as that removes the foundation, and will make those squares exterior squares, use the remove walls tool.

[Trixi]

just drag the new building to the next tile of the existing building.

if you drag over the wall, the wall will be destroy (useful if you want to increase size of your canteen or sth like that

if you drag only to the next field, the new part of the building will be build, without removing the wall.

[ KARR™]

I made a guide for this - its on the last section.

http://steamcommunity.com/sharedfiles/filedetails/?id=533324411

Placing it next to the wall will keep the walls up, overlapping will extend the current room destroying the walls.

[JokerAce]

wasnt like this before i bloody hate it all i want to do is pick a floor build wall around and when room is sealed with door should automatic become a room instead of the foundation crap its really a pain in the ass!

[Docsprock]

Originally posted by ¬Robotron¬:

wasnt like this before i bloody hate it all i want to do is pick a floor build wall around and when room is sealed with door should automatic become a room instead of the foundation crap its really a pain in the ass!

It has always been this way. Well, for 3+ years it has.