Contractors will be required to supply and install quality that is. To install sound insulation from the outside of the building and the installation of the material of the wall, voices in the t-bar dividing all aspects.
Contractors must provide quality materials. And installation technicians who are skilled jobs. Installing sound insulation from outside the building. And the installation of soundproof material in a rough outline of the walls between the rooms.
Contractor to supply quality. Installation and skilled jobs. In the installation of sound insulation of the exterior of the building. The installation of sound barrier material dates in the frame of the wall between the rooms in every aspect.