1] How a house is built - good primer for those building from the ground up, or making structural alterations
http://www.howstuffworks.com/house.htm
2] UK builders merchants - buy that rockwool RW3 with ease!
http://www.britishcompanies.co.uk/buildersmer.htm
3] BRICKS - great for building walls
http://www.hanson-brickseurope.com/
4] ROCKWOOL( UK ) - find information here
http://www.rockwool.co.uk/sw7188.asp
5] Drywall ( Plasterboard, sheet rock, rockboard ) ( UK ) - info here
http://www.british-gypsum.com/
6] WOOD is used a lot in studios - everything you need to know about wood
http://www.trada.co.uk/aT/web/standard/home/home.html
7] Site sbout noise isolation ( domestic )
http://www.topblock.co.uk/products/acoustic/ais1.html
8] Custom Audio Designs - Soundproofing articles - they also sell related stuff
http://www.customaudio.freeserve.co.uk/techfrmset.htm
Paul