There are over 60 domestic manufacturers of composite and PVC decking and a Mold and mildew are a frequent problem with non-capstock composite deck .. boards have a double arch profile on the bottom and Veranda WPCGuard™
The Problems with Composite Decking The Craftsman Blog
Apr 23, 2018 I don't have problems with new products, only subpar ones. There are a multitude of problems with composite decking that show up all too often to be just a stray .. I called Home Depot and they told me to call Veranda.