Lib research
Master mason- A skilled architect who would desgin the castle.
Peasants would to the very hard work.
A castle was like a big stone sandwich. there was the outer layer of stone and the inner layer was filled with rubble and mortar.
Typically a castle wall would only grow ten feet per year.
floor and roof tiles were made out of clay.
Info from: Everything Castles NG, by Chrispin Boyier
Stone masons had many different tools like a stone axe, chisels, a hammer, a wooden mallet.
info from: Medieval Lives Stone Mason, by Robert Hull.