can anyone help. i waterproof rendered a couple of walls in a customers house after she had a damproof course injected. I then levelled them up as best I could with bonding and then skimmed them with multi finish. she has since had a guy from another damproofing firm in and he says I should not have used bonding and thats why the walls are still a dark colour and still containing moisture. I could be wrong but I think its because the moisture can only go one way now because the render is waterproof and if she put a dehumidifier in the room or opened a window it would dry out but like I said I could be wrong. please somebody give me some advice. cheers