Description : Hello, three years ago we built a brick house from Porotherm and used thermal plaster from the outside. There were small balls of polystyrene in the bagged mixture. I've been watching a weird thing for ... inside the plaster? If you have any idea, possible explanation, write to me. Thank you. Marie
Last Answer : I recommend contacting the plaster manufacturer / seller and consulting the application procedure. If an error was made during application, the manufacturer should detect it.