Remove corrugated aluminum nail plastic roof

[Refotsirk]

Hi! I'm replacing my patio roof. The old fiberglass plastic is nailed with ribbed, thick aluminum nails. They're almost impossible to remove. With a crowbar, the head comes off immediately, and with pincers, it just scrapes the aluminum. Can't get enough leverage. I managed to remove one out of the six when I tested. Does anyone have any tips?
Best regards/Kristofer Johnsson

 

[Suvi5700]

If the old roof is to be removed, cut them with the angle grinder.