WINCHESTER, Va.--(BUSINESS WIRE)--Trex Company, Inc. (NYSE:TREX), the world’s largest manufacturer of wood-alternative decking and railing products, today announced financial results for the second quarter ended June 30, 2015. Net sales for the second quarter of 2015 totaled $136.8 million, a 13% increase compared to net sales of $121.3 million for the 2014 period. The Company reported net income of $18.7 million, or $0.58 per diluted share, for the second quarter of 2015 compared to net income