Sound attenuation. I have designed a loft conversion in a mid terraced first floor flat. One of the panning conditions was for a sound attenuation scheme. I submitted amended plans showing drylining on the party walls. The Public Health Officer has said that the condition cannot be discharged until i show that we intend to upgrade the floor betweeen the ground floor flat and the first floor level of my client's flat! Surtely this isn't necessary? The planning officer (assistant i mentioned earlier) says that as there are more bedrooms there is a likely increase in people living there and therefore will crerate more noise so we need to upgrade the impact and airborne spound insulation across the whole of the ground/first floor! anyone had any experience of this?