Chartered Bank Headquarters, London

This roof refurbishment on the Chartered Bank headquarters building in London was part of the bank’s ongoing energy efficiency projects aiming at creating a low energy and low carbon building. The refurbishment included a new solar installation as well as the replacement of the old sedum roof by a wildflower roof providing more biodiversity. To avoid the need of penetrating the roof waterproofing, a ballasted system with ZinCo Solar Bases SB 200 was chosen to mount the PV panels. The solar frame inclinations and the distance between rows had to be carefully planned by the ZinCo technical department to avoid shading of the solar panels and reducing their efficiency. For the same reason suitable plants not growing too high had to be selected. Evapotranspiration from the green roof helps to keep the ambient temperature on the roof below a max. of approx. 35° C thus increasing the PV panels efficiency.