Made of 75 percent long-fiber pine compound and 25 percent virgin polypropylene, this composite wood can be painted, stained, nailed, and treated just like wood. And it's stiff enough to be used in vertical applications. But thanks to the formulation, it won't rot, decay, mold, split, crack, and it won't leach treatment chemicals into the soil. The boards can withstand direct ground contact and are used for retaining walls, decks, railings, and siding that looks remarkably like western red cedar. Left unstained, it will weather just like the real thing—but last a lot longer.
Starts at about $2.40 per square foot.Wood 2.0, by Tech-Wood