Hi, I want to reduce the sound from next door. The wall is brick about 2m wide at the top off the stairs. I don't want to loose any area so I'm going to remove the plaster back to brick. Was going to use soundshield board(wickes), maybe two sheets together. Wondered what the best way of fixing this. I was going to dot & dab the first sheet and then use adhesive to bond the second sheet to it?