The U.S. decking market is expected to reach $7.1 Billion by 2020, with the fastest growth in plastic and wood-plastic composite decking. While the demand for wood decking should increase by a healthy 1.3% annual rate, the demand for wood-plastic composite decking is expected to rise 4.5% annually, according to the Freedonia Group's most recent market analysis. Freedonia predicts that the non-wood share of the market will reach 17.9% in 2020, compared to its current 15.8% market share. Read more here.