Acoustic insulation is becoming increasingly important, particularly in buildings which require reduction of external noise or reduced intrusion from impact noise caused by rain. Buildings used for education, such as schools and university lecture theatres, as well as other large buildings, very often have metal roofs. Metal roofs are used in these buildings because they are lightweight, easy to install and easy to maintain. However, the nature of the activities which take place within these buildings means that noise reduction is a particular concern.
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