There is a before and after regarding sound insulation in Spain and the date was September of 2009. Any building which building licence was obtained after that date must comply with very strict rules on sound insulation. The “Código Técnico de la Edificación” the counterpart of the British Building Regulation states that the protection against noise generated in the same unit of use i.e. adjacent rooms in the same home unit:The global index of noise reduction, in, Ra, shall be for...