Grounding Antennas - Lightning protection

We are planning on putting our rotator on the roof at school, and I have been looking into different forums on grounding the antennas for lightning. I have seen many contradictory comments about putting ground radials in. Any suggestions for what to do or where to look for reliable resources?

Hey, @planetsofa has written this Lightning protection / grounding.

For a setup at an official location i strongly recommend a qualified electrician. Surely there already exists some extend of lightning protection in which your system needs to integrate. I would not use a “make” approach here.