Has anyone got any views on using aluminium nails for a slate roof. My roofer says they are better that copper as they `give ` a bit and have bigger heads.
My own experience of aluminium on bikes is that it can go brittle with age.

Thanks

One of the worst mistakes is to use 40mm nails which puncture the sarking! Use 30mm ones !

I'd use copper every time, esp in a coastal project. Copper are prob 50% more expensive, but in the grand scheme of things, I would use copper. As to the nail length, the slate thickness needs to be considered, as well as the slate length and head lap, which will alter the angle of the slate and so the nail shank length above timber.

Good decision