Hello,

Due to a leak upstairs, the plasterboard ceiling below got all soggy
and I have pulled it down. Before I replace the plasterboard, is it
worth putting anything above it? I've never had a house with
insulation between the ground and upper floors but perhaps practice
has changed since these houses were built?

I see Wickes sell slabs of insulation 2 inches thick. Does it help
keep sound or noise out? Is it worth doing?

Which thickness of plasterboard should I use? I thought 9.5mm might be
easier to lift but the old stuff seems to have been 12.5mm.

Thanks and Happy New Year!
Stephen.