Hi, I have just had my old lath and plaster ceiling replaced due to a flood that come through from the bathroom in the flat above & caused my ceiling to collapse. My ceiling before was over 2inches thick in parts but the Landlords of the flat above have replaced it with 1 layer of 12.5 sound board with a light skim over the top which is screwed directly to the joists in the ceiling. The amount of noise now that comes through is waking me up 3-4 times a week. I can hear when they're talking up there now, toilet being flushed, draws being pulled in and out and constant heavy footsteps and boards creaking, I don't have this issue with in any other rooms and never really had an issue with noise in the 14yrs I've lived here. I'm told by others in my building the ceiling should be double boarded for Fire and Safety regulations and meet the 1hr fire resistance, would 1 layer of 12.5 and a light skim meet that?. Also is it worth me getting a sound test done?. If anyone would be able to advise on these issues that would be much appreciated. Thanks