I know this isn't aus.d-i-y but as there's no such group I'll ask here. I gave away all my tools before emigrating as I didn't think I'd need them in a new high rise, but now have to do a little work to a rental property.
Main job is replacing the roofing on a very long covered way, about 25m long x 1.5m as the existing fibreglass is covered in moss and algae and has clouded over, some sheets cracked. I will be using corrugated polycarbonate (not twinwall) fixed with these self drilling screws (several hundred in total)
Any other hints - have done lots of more complicated jobs in the past, but never this. I assume the screws will have to be set by eye as the torque setting on the drill won't help with corrugated plastic.