In certain circumstances, the colours of some materials, when exposed to direct sunlight, can fade.  Materials can change colour when exposed to solar radiation. The most efficient way of preventing fading is to exclude ultra-violet radiation, since despite its low proportion within the electromagnetic spectrum, it is the main contributory factor to the process.

UV radiation can be virtually eliminated by the use of PVB laminated glass.  A second option is to use a body-tinted glass, which will filter light selectivety. Thirdly, glass with a low solar factor could be used to reduce the thermal effect of the radiation.