One of the Inexpensive and Practical Finishing Materials for the Ceiling is Polystyrene or Polyurete Foam Plate. Polyuretan Is Similar in Its Density with a Tree, But Unlike Its Not Crack Over Time, Does Not Deform and is not Subject to Decay. Polystyrene Plate Has Similar to Polyurethane Properties, But Has a Much Smaller Weight. It is noting that all rooms in the Apartment, Except for the Kitchen and Bathroom, Can BE FINISHEDH A PolystyRENE, SINCE THEY OBSERVE Increased Humidity. In the Same Rooms, You Shoup Use a Polystyrene Plate with A Protective Coating of Laminate, Which Cost a Little More Expensive. The Advantage of this Material Is the Lack of the Neeed for Preliminary Elimination of Various Flaws of the Ceiling, For Example, Cracks, Potholes, The Resumains of the Old Coating. However, it Will Not Be Possible to Hide Serious Defects.