Screws VS helical nails

[MisterBoy]

Been looking at super-8 and super-7 from https://www.ancon.co.uk/whats-new/staifix-super-8-headed-helical-nail-for-flat-warm-roofs

Sound cool but pricey ~50p a nail even buying a big box, rated 6.9/m2 I'd want ~500

Or regular screws e.g. https://www.screwfix.com/p/turbo-si...k-multipurpose-screws-6-x-180mm-50-pack/18160

27p and guess buying a few hundred trade could get them basically 1/2 price of S8. Saving £100

120mm insulation so looking at 170-190mm. Are helical much better? How about easiness to install. How would any experienced chap here do it?

 

[Diver Fred]

I'd go for Screws - esp. if you have a power screwdriver.

 

[sircerebus666]

Screws for the easy life unless you fancy building up some arm muscle....

 

[MisterBoy]

Same number per M2 would you say? Like 20-22 per OSB board