You are thinking of floors within a donjon or in the mural towers. Medieval architects were perfectly able to design and build upper floors of stone, but this always involved strong stone arches in the storey below (as in cathedral crypts and manor house undercrofts). Building these arches was a lengthy and complex process and meant the loss of valuable space in that lower storey.
By using supporting timbers that were simply set into niches in the stone walls, there was a much simpler building process and no space was lost below.
The castle was not a place that we think of today and the layouts of the castle were constructed to meet the needs for optimal fortification and defense. Usually constructed with a moat, an outer curtain, and a drum tower. These three points were vital and without them the castle was vulnerable for siege and attack. The interior of the castle differed from structure to structure often it depended on the wealth of the man who owned it. The upper floors were used for defense and the great hall is where most business took place. There could be outer apartments along the walls of the castle, but these were not inside.
Aegis cave has 3 Ice floors, 4 Rock floors and 5 steel floors, with a stone marker floor before each section, and a floor for each guardian fight below this. Then there are 6 deeper floors before Regigigas' Chamber.
No, most Roman houses were stone floors, however some could afford a mosaic floor, but not carpets.
the stone castle has a mote and stone walls
yes, Skipton castle is a stone keep castle
You can't clean wood floors with a steam cleaner, but natural stone floors should not be harmed by this method. Vinegar and water is the best way to clean stone floors.
The Bissell steam mop can be used to clean a vinyl floor. In fact it can also be used on marble, ceramic, stone, laminate, linoleum and sealed hardwood floors.
square stone keep castle
A stone castle
A stone or square keep castle is the extention of a motte and bailey castle.
A stone restorer is not needed to polish a travertine floor. However, the process is complex and time consuming and involves the use of a pressure washer and floor polisher with several different grits of sand paper and steel wool.
Floors are for walking on, supporting other structures, pretty basic stuff. Dirt is and was likely the first flooring material, probably stone(s) came next. Floor coverings do just that, they cover & modify the usefulness of a servicable basic floor. the Hides of the animals we killed & ate & wood, stones & even baked clay tiles that we found under the fire pit all came next. Today we use rugs, wood, Carpets, Ceramic, Stones & poured floors such as concrete as floors & floor covering.