Some were thicker than others. It also depended on how protected you want your castle to be. Also if you had enough money.
The safest part of the castle is the keep because it is the highest point in the castle. Also, it is made of thick walls.
Moats and thick and high walls
Well I'm no expert on the subject, but castles usually had thick walls to try prevent enemies from breaking the wall down to intrude the castle.
The walls of the castle are 18ft thick. So arrows can't break through the castle. I got this answer from http://www.pennyparker2.com/blarney.html. But its very scary walking round the top as the building is very high and all the inside has collapsed.
Murder holes, tall towers, arrow holes, and thick walls.
Castles were usually made of stone or brick and the walls were very thick to stop attackers from getting in.
Yes, the word 'castle' is a noun; a word for large building with high, thick walls and towers that was built in the past to protect against attack; a very large, expensive house; a piece in the game of Chess; a word for a thing."I am going to the castle." (a place)"The castle does not have many windows." (a thing)
Yeaah It Does The Features Of The Shell Keep Castle Are That Non Thick Walls Made It Easy Too Be Burnt Done And It Was Very Good For Living Space...
The type of castle that has two walls around it is called a concentric castle. ferocious
The walls were 5 feet thick!
the splendor falls on castle walls and snowy summits in old story; ....Its "the Splendor Falls On Castle Walls" by Alfred, Lord Tennyson
Saprophytes have thick walls called endspores?