Urgent help please! The original plaster (28 years old) in my lounge showed many filled-in holes and some small cracks so the plasterer reskimmed the walls with Knauf finishing plaster. The finish was not good so he covered the rough areas with Gypsum easifill. As the plaster dried, it became obvious that it was not bonded. The plasterer said this was because his assistant had not pva'd the walls. He said he would have to take off the new plaster and re-skim but he now tells me that if he puts on a topcoat of pva, the pva will soak through and bond all layers to the render. I did query this with him but he insisted it would rectify the problem. He would only reskim any areas which fell off.
Since first posting this, my plasterer (now ex!) has pva'd all the walls. He has filled the areas, using both Knauf and easifill, where the plaster fell off on touch. This new plaster has blown, the first Knauf he applied still feels loose, and the whole room looks a horrible mess!!!
If you are a skilled plasterer, please, please tell me what now has to be done.