I think this doesn't work anymore. I tried this mod to make my thatched roof hut (nothing under the roof) recognized as a room by the game, and I verified with the "/debug room hi" command. All the block faces are red except the roof. It's winter on my game and I'm still freezing 😤

Edit : after several tries, I cancel my comment. This mod works very well and I thank the author. I was misled by the debug room command, you have to go out of the room to update the color and therefore know if your house is considered as a "room", which I had not done. I used the "Room indicator" mod to make sure, everything works fine. My thatched roof hut is now ready for winter!