Officials at West Kent College in Tonbridge, Kent, sent an email to all pupils warning that the behaviour was "totally unacceptable", and saying any students caught harassing contractors would face disciplinary action.
The email was sent after a demolition team started work on a £94 million, three-year building project at the campus.
The email read: "It has come to the attention of the college that some female students have been making comments to, or whistling at, the builders both whilst on site and as they walk around the campus.
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