Trex, a manufacturer of composite decking and railing products, reported net sales for the first quarter of 2012 of $96.1 million, a 39% increase over net sales of $69.0 million for the same period in 2011. 

The Winchester, Va.-based company reported net income of $12.3 million for its first quarter,  which ended March 31, 2012. This compares to net income of $5.1 million for the prior-year period.