I used the same roofing stuff when I built the wood store, about 18months ago and set the batten centres at 500mm. As you can see with the summer sun on it and then the autumn winter debris it’s bowed to all hell. Just a heads up.
oh - i missed this - one of my inspo projects has battens at 450 which is what the onduline info says - but now I look closely you can see a bow on the underside. I may go 400.
I used the same roofing stuff when I built the wood store, about 18months ago and set the batten centres at 500mm. As you can see with the summer sun on it and then the autumn winter debris it’s bowed to all hell. Just a heads up.