The introduction of BS 8579:2020 in the UK created some uncertainty around the treatment of vertical surfaces on balconies. As a result, warranty providers such as NHBC now require a drip edge at the front of balconies to prevent water from dripping onto those below. Sapphire offers a simple yet effective solution: a drip edge that can be added to the front or sides of the balcony. This allows soffits to drain properly onto the drip edge and away from the structure. A practical application of this solution is found at Kew Bridge Rise, a Hills development in Brentford.