Some info that I've got and the bloke from the Council seem to imply that sarking should be used under the cladding of the RBV walls. To my mind sarking is water and air-impermeable barrier. The RBV diagrams though all have a breathable membrane there. I coudn't find any reference to RBV in Australian Standards. Can someone enlighten me please, what right/proper/best - impermeable barrier of breathable membrane ?
Chris