The same as a house floor tile (as far as I remember) Requires 1 board to put down, this would be excellent to make luxurious areas.
loftar: The inner chaos of the Jorbian mind is hard to conceal. jorb: It's called creative license. You know, that thing you seem to want to apply to logic, grammar and coherence?
Stone flooring, too. I'm sure it would show up when Architecture is finished, but eh.
While on the subject of furnishings, I had a thought for tables; have them act like inventory spaces when used, so you can stack a bunch of raw resources on them and then use them for crafting without shuffling from basket to basket.