Cladding

In 1998 we renovated a facade. We decided to use Western Red Cedar for reasons of efficiency and looks. We searched, but could not find a membrane that would be sufficiently resistant (UV). In the end we decided to use a roofing membrane made of PVC.
How would this facade withstand the elements? Would it keep good looks when ageing?
15 Years on, PVC and wood are still in good condition. There is some degradation, mainly dirt clinging tot the PVC, but it does not accumulate, it is washed away regularly when getting really
wet.