Most often, metal is selected as a material for the front door. The door box consists of steel pipes. In order to ensure high sound insulation, the door space is filled with a special layer. Such a layer can be either from wood or from foam.
Most often, metal is selected as a material for the front door. The door box consists of steel pipes. In order to ensure high sound insulation, the door space is filled with a special layer. Such a layer can be either from wood or from foam.