On 10/05/2021 21:47, Rod Speed wrote:


"newshound" wrote in message


Metal sheet comes in a range of thicknesses and geometries. The
thinnest (eBay) lasts pretty well, it is light and pretty easy to cut
and fix. If in a windy area you need to make sure the edges are well
fixed down.

imo metal decking works much better. Happy with a very low slope
and since the clips are attached to the rafters first, well retained after
you button punch the decking onto the retaining clips. Lasts much
longer than anything else except stuff like copper or zinc sheet.

Not sure how the proper farming/industrial stuff over here is fixed
down. The cheap stuff that I have used is just screwed through the high
spots with a sort of domed plastic cap over the screws. I agree, it
doesn't need much slope for water but of course here we also need to
cater for snow.