i am building a large garden shed cabin, 16x12 feet, and was wondering how to insulate it for all year round use, is there any more advanced better materials availible than fibreglass, i also want electrics installed for ceiling lights, outlet sockets to run a projector, amplifier, dvd, subwoofer, projector screen, heater etc, plus id prefer the wiring to be hidden, but dont mind, using plastic cable concealers, i want the building, to be able to have carpet as well, without it rotting, how much will it cost to insulate, and provide the electricity. any ideas anyone.