Prison Architect Padded Cells -

You do not "apply" padding to a normal cell through an object menu. Instead, you must use specific Room designations. Padded Cell | Prison Architect Wiki | Fandom

Criminally Insane inmates cannot be assigned to normal cells. If you lack padded housing, they will simply stand in your delivery area or hallways, creating a security risk. prison architect padded cells

are specialized housing units introduced in the Psych Ward DLC (and its expanded PC version, Psych Ward: Warden’s Edition ). Unlike standard concrete blocks, these rooms are designed specifically to handle the unpredictable and often violent nature of Criminally Insane (CI) inmates. You do not "apply" padding to a normal

Standard cells are for punishment and containment; padded cells are for stabilization. padded cells are for stabilization.