While searching for (cheap) HDPE cutting boards to use for the JGRO adjustment blocks, I also started wondering what type of plastic that decking lumber is made from. I found out that Trex (which I'm familiar with) is not pure HDPE - it also contains LDPE and wood.
I did find several decking lumbers that are pure HDPE - the PDF file at the following link lists dozens of products and manufacturers:
So... has anyone used this material? It seems that it would be consideably cheaper than buying HDPE from the web, and can probably be picked up locally - no shiping costs.
Any downside to this???