According to the royal order of adjectives, 'old' should be put after 'crumbling' and 'torn'.
Not a teacher.
Student or Learner
Which sentences would you say?
1a) That crumbling old house is a disaster waiting to happen.
1b) That old crumbling house is a disaster waiting to happen.
2a) She always wears those torn old jeans.
2b) She always wears those old torn jeans.
***NOT A TEACHER***
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I would say 1a) and 2a)