How close between screws on bargeboard sheets?

[tyomka]

Hello,
I am going to replace the bargeboard flashing on our roof and am therefore wondering how closely they should be screwed. The old ones are nailed with completely uneven intervals.
The new flashings are 2m long and 12cm wide.

 

[tyomka]

Maybe worth noting that the roof is a concrete tile roof and windskivsplptar should be screwed into the windskivsbrädor.

 

[Frerider]

I usually screw in about 80mm from the end and the joints, then I divide it into a suitable number with 400-500mm c/c.