I am about to move into a Victorian terraced house and am planning on doing a fair amount of renovation. We'll be putting up a few stud walls and moving the bathroom upstairs. We want to make the house as thermally efficient and as acoustically insulated as possible but need to do so as cheaply as possible. Any ideas and tips would be very gratefully received but our main questions are whether, in addition to copious loft insulation, there was something we could use to fill the new stud walls or a material for under the plasterboard. Also can anyone suggest the best thing to use to clad the party walls before they are skimmed to protect our neighbours from our noise? (We've thought about using rockliner). Also, we're planning on tiling a fairly large area of floor downstairs (kitchen / utility / toilet) and since it is going to need some ply over the floorboards, is there anything more thermally efficient to tile onto, ideally instead of the ply, or otherwise under it? Our budget won't stretch to under floor heating!

Mainly it is the environmental issues - and trying to make the house as cheap to heat at possible. The ground floor has a cavity under the floorboards and we imagine that when it's tiled, the tiles will be quite cold. But we're also quite keen on playing music loud and so want some acoustic insulation on the party walls.

Basically, we know to have decent loft insulation, we'll be buying thick heavy curtains and draft excluding, and we'll be getting energy efficient lighting, appliances, boiler, thermostats etc but what else can we do? Since we'll be getting a load of plastering done and taking up the floorboards anyway, I wonder if we can use the opportunity to give the house a bit of wooly jumper under and between floors or on the walls?