How to ensure not fade?If it fades, how much percentage it will loose?

All the WPC product will fade a little after it is exposed to the sun and undergoes the weathering. The anti-UV additives are added to reduce the fading and it will be much suitable for outdoor. During the first 3 months, the color may change a little, but it will not affect the overall effect. After that, it will become be natural without further change anymore.