second floor of a stone structure, wood or stone?

[morganPotPie]

Hi All,

I've just recently started again on a map i've been making.
This is for Dungeons and Dragons campaign, so more of a medieval England feel.

The map itself is a stone structure (an abbey) with stone walls and stone floors. Stairways are also stone as of now.
Now that i am moving onto the second floor, I question:

Should the floors be made of wood or stone as well?

I've read that structures have wooden second floors for ease of support, manpower, and i'm sure some other reasons
however, i know going to castles and such, the second floors are almost always stone, unless i am incorrect?

The abbey itself I had planned on having in a remote mountain forest, so both resources are available.

If anyone could provide some insight, or could point me to somewhere to where i can do some research on similar matters, i would much appreciate it.

and here is the map thus far, in case it is helpful?


Thank you!