What material for walls and floor ?

[Pa Lang Gi]

Hello!

I have a room entirely made of concrete. I'm planning to use it as an extra room for the family and therefore will be heating it. All the walls are above ground, but the back long side borders an unheated basement area. We will be heating it with radiators.

Now I'm wondering what would be best:

Should I just plaster and paint?
Should I frame and install drywall?
Frame with metal studs and use moisture-resistant drywall?
Lay tiles or just paint the floor? Use self-leveling compound since the floor is sloping and uneven?
The ceiling is low, about 1.87m and the space is approximately 12 sqm.
Ventilation, what type?

 

[ati]

With that ceiling height, I would do everything to keep every possible centimeter, i.e., plaster walls, smooth the ceiling, and paint the floors.

What does the ventilation look like in the rest of the house? Is the front door the only entrance to the room?

 

[Pa Lang Gi]

That there is no ventilation but it is not sealed around the windows and door. Thinking a vent with a fan would be good?

With that ceiling height, I would do everything to keep every possible centimeter, i.e., plaster the walls, spackle the ceiling, and paint the floor.

What does the ventilation look like in the rest of the house? Is the front door the only entrance to the room?