Cross Laminated Timber (CLT) is a modified timber building product in widespread use internationally. While itsuse in Australia is currently not widespread, the potential of the product for using in dividing walls, floors andceilings is increasingly evident, particularly for multi storey residential buildings. Such buildings have particular acoustic requirements, mandated in Australia by the National Construction Code, Building Code of Australia (BCA). Extensive acoustic research programs have been conducted across Europe and in North America on CLT’s acoustic properties. The particulars, designed to meet local building codes, building practises and local materials, mean that it is not always possible to compare the results to the NCC’s acoustic requirements.