BS 7533-13: Pavements Constructed with Concrete Pavers – Guide for the Design of Permeable Pavements Constructed with Concrete Blocks provides comprehensive design guidance to ensure that areas surfaced with Tobermore’s Hydropave permeable paving range are fit for purpose and structurally sound for a minimum of 25 years, when designed and installed in full compliance with the British Standard. We recommend adhering to our Hydropave permeable paving maintenance guidelines to maximise the product’s performance and ensure its longevity.