Hi Wang Gong, see below :1. Keep 40-60dB currently noise range ( raining day upper than 60dB )2. We have 3 building need to re-work, Samsung’s building need to completed by dated 31Dec20193. 10 years duration is minimum requestAnd I wonder your suggestion 1.5mm thickness adhesive materials can be well noise cancellation?Pls. make sure your test data are correct to me before I take action.