The independent laboratory’s testing with the seem evidence wooden doorway body device fulfills the newest requirements. Sound resistance Wooden and metal doors from 50mm to 60mm thickness. Sounds resistance from STC 35 to STC forty five. Both alternatives call for electric locks that suit regular cylindrical and mortise lock preparations https://woodenacousticdoors09187.vidublog.com/37585494/indicators-on-wooden-acoustic-doors-you-should-know