Wooden roof: evaluation of acoustic performances performed in laboratory, on an external test-cell, and on real buildings

The study concerned the evaluation of sound insulation of light structures, such as wooden roof. A first analysis was focused on laboratory evaluations of different sequences of layers, obtained with both common and innovative materials. Based on the results obtained with the laboratory tests on the acoustic behaviour of the insulating configuration of wooden roof used, the second step of the research consisted in studying an "ad hoc" outdoor full-scale test cell on which a second set of measurements was performed. The comparison between laboratory results and those obtained from the outdoor test cell showed a remarkable difference in sound insulation between the two conditions considered. Moreover, measurements were carried out with and without roof tiles, and it emerged that the tiles heavily affect the sound insulation of the entire roof. The final step of the research involved the execution of in situ measurements of wooden roofs in real buildings, using two of the insulating configurations of wooden roof tested.