Rain noise has the potential to adversely affect users of a space which is more prominent on lightweight roofs and glazed/Perspex rooflights.
Adverse impacts can occur more prominently when a space is used for speech or performance.
The current Building Regulations documentation for schools (BB93) and BREEAM Hea 5 provide rain noise criteria.
We have advised on hundreds of successful schemes where rain noise was a potential issue. Our advice is based on modern modelling techniques, analysis of manufacturers test data and our many years of experience.
The process involves us detail checking, predicting, and advising on the constructions you propose, with our assessment, advice and mitigation measures provided within a report that could be used to aid in your design and your BREEAM or Building Regulations submission.