In the last 10 years or so, cellular PVC products have been a game changer for exterior trim. Like most products, PVC trim has advantages and disadvantages. As a carpenter, I don’t love the material—I much prefer wood sawdust to plastic sawdust. And so does my wife—especially when I come home after working and the fine, white dust statically clinging to my clothing eventually finds our furniture. But dust notwithstanding, you can’t beat PVC for its longevity and stability.