You can only have a roof out to i believe 6 tiles from a wall otherwise it ll collapse.
Rimworld wall roof.
Be careful with 12x12 rooms if you re planning on replacing the walls like exposed mountain rock wall stone block walls.
Walls alone can fend off early game raids if enough repairmen can keep the walls standing while enemies start to starve and become tired.
Changing the zoning does not change.
Larger roofed areas can be built with the use of interior walls as pillars.
An impassable wall capable of holding up a roof.
Rimworld defenses come in all shapes and sizes and this can be customized to work with all of them.
This is especially important when mining.
That is what i found out for me i cant promisse you thats 100 true for every situation since i guess it is possible to support more tiles within a.
Roof tiles can be up to 6 tiles away from a wall thus 6 from each side is 12.
A roof collapses if there s no support rock wall within 6 squares of the tile.
They will remove it like any other roof.
The roof will not be builded or that tile will not be builded.
By default colonists only build roofs over enclosed spaces rooms.
If you removed 2 entire walls and the corner between those two sides last then that roof was too far away from any other supports.
Interior areas built larger than this will remain partially unroofed.
Note regardless what the build roof zoning says you can only build roofs a certain distance iirc 6 tile from a wall mountain.
But by explicitly marking a zone as a build roof zone your colonists will always construct a roof there.
It s an alternative defense that can also support your ma.
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Walls also protect from predator attacks and manhunter packs which cannot reach colonists safely inside unless a colonist is seen passing through doors at which point they will attempt to break them down.
You ll need to build a few supports when you start replacing walls to prevent roof collapses or cave ins.
This means that the largest square room you can have is 10x10 internal.
Forget to replace mined out rock with support walls and you ll have squashed pawns in short order.