What's the best way to reattach a piece of siding?

Question

I just noticed I have a piece of HardiePlank® that is coming off the side of my house. What would be the best way to reattach it? I have no experience with the stuff, but it seems like a simple diy fix.

It's just my luck that the piece that's starting to come off is also at one of the highest points on the house.

Answer 1

From the installation instructions

Face nail with a 2" 6d or siding nail.

For good measure you could put a dab of matching color caulk behind the nail head before you nail it all the way down.