Part L of the UK building regulations places restrictions on the amount of glazing that can be used in buildings. Solar shading, is a form of solar control that can be used to optimise the amount of solar heat gain and visible light that is admitted into a building. This can have a significant impact on the energy use of a building as well as on the thermal and visual comfort of occupants, protecting against overheating and glare on hot or sunny days. It can also provide privacy.