Are the outer buildings treated before delivery?
All our buildings are pressure treated for woodworm and dry rot before manufacturing. Although this is a good starting point, all timber will require a treatment paint in order to make it water proof.
Ace Sheds recommend Protek as a good quality proven treatment. There are obviously many alternatives on the market available from your local DIY store but attention should be made to the labelling. Not all treatments are water proofers and will offer vary little protection at all!