I've just removed an in-built wardrobe in our new-build apartment and have realised that they only used sealant to secure it to the walls and ceiling.
This was an L-shaped wardrobe in an L-shaped nook. The wardrobe was a hybrid between a front frame and carcass, i.e. it had its own walls, floating shelves, floor, but no ceiling, no back and nothing was screwed into the room's actual walls.
The shelves and floor of the wardrobe held the walls of the wardobe together, giving it some structure. My question is if I were to install a new in-built wardrobe (using the remenants of my old wardrobe), would attaching it to the room's walls and ceiling solely using silicone or sealant be adaquate? I would have a shelf and a floor to give the walls rigidity but no ceiling and no back.