Finding nails and staples all over yard after roof replacement
Unfortunately it is not uncommon for workers to be less than careful or less than thorough in clean up. (nor could i say it is common)
Is it &quot;normal&quot; ?  There is no way to answer that question.
If they were &quot;trying&quot; to do a clean up then it would seem that  there is a company policy in place to do it but maybe it was not executed properly.
Magnet sweeper