Alternative suggestions to composite cladding, where walls won't be seen

[Drummer Boy]

Hi all.
I'm planning a garden room/office which will be situated towards the corner of the outdoor space. It's a SIPs build with HouseWrap and battens as you'd expect. The front and right side elevations will be visible and clad with composite interlocked cladding, but the left and back won't be visible at all. It seems pointless to be spaffing an extra £600 on the same nice composite cladding as the front/right walls when they will never be seen. But of course I need to protect them - what would you suggest please? Bitumen painted OSB? Some form of vinyl sheeting like is sometime used in bathrooms (or would that degrade outside too quickly)...? You get the gist.

Thanks so much for your help and suggestions.

 

[freddiemercurystwin]

Cheap Cladding for a shed

What would be the very cheapest cladding for a outdoor garden shed ?

www.diynot.com

 

[freddiemercurystwin]

Or consider plastic coated corrugated sheets.