Removing a single tile of roof/floor?

Game Talk The Bunker
1

Basically I’m trying to remove a single roof tile on a building to let a sliver of light come through the ceiling.

I have access to the roof, and I have a pickaxe/jackhammer. I’ve read around online about people able to destroy floors, but I can’t find any way to. Activating the pickaxe does nothing, and neither does smashing with it.

2

Have you tried ‘dig downstairs’ from the construction menu?

3

For what you describe and intend to do, no. There’s currently no in game way to add a poor man’s skylight to a house.