We fixed horizontal battens and thin sheets of ply to the walls. All this was then cladded over with thin pine boards to give the van a more homely feel. We sanded and stained the cladding with Danish oil for a nice finish. We managed to find a whole load of laminate floor boards in a skip. After a good clean up I simply cut and laid them down to fit. However, we might end up changing these to a vinyl floor at a later date to save on weight.