made a 2 story base and getting cold while on the second story

[MonkeyNBananas]

I made the base out of basalt, walnut planks, and walnut logs. The bases I've made single story with basements keep me warm. Did I use the wrong materials?

[little_creature]

Rooms have a max interior size of 14x14x14, so if it's any larger than that then it won't count as a room. You can use the command /debug rooms hi to check if it counts as a valid room (it will highlight green if it does)

[HalfAxd]

The Status HUD mod is really useful for telling you if you're in a cellar or room.  It's visually appealing

[Nathan Flaminio]

If it's too big, you may need to wall part off and put in a door/trapdoor. 

Chiseling too much of the wrong thing will also cause it to not count as a room without a mod to mitigate that.