On 04/08/2020 11:17, Andy Burns wrote:
TimW wrote:

This is an ordinary timber garden shed 8' x 10' (2.4m x 3m),Â* the
soffit boards are totally rotted. what would be good? Onduline?

I fitted coroline on mine the first time the felt 'went' the boards were
in good condition, it's lasting very well, but not sure I'd go to the
trouble if the roof was rotten.

Depends what wood is rotten. As I remember it, replacing a rotten roof
panel was easier than the felt.