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Trex Company Reports First Quarter 2021 Results - First Quarter Residential Revenue Growth of 25 % - - Capacity Expansion to be Completed Ahead of Schedule - - 36 % Revenue Growth Expected in 2Q 2021 at Midpoint of Guidance - - Reaffirms Full Year 2021 Incremental EBITDA Margin Guidance of 35 % to 40 % - First Quarter 2021 Highlights - Consolidated net sales increased 23 % to $ 246 million - Diluted earnings per share of $ 0.42 , up 17 % - EBITDA increased 20 % to $ 71 million ; EBITDA margin of 28.9 % - $ 46 million in share repurchases Exhibit 99.1 WINCHESTER , Va .-- ( BUSINESS WIRE ) -- May 10 , 2021 -- Trex Company , Inc. ( NYSE : TREX ) , the world's # 1 brand of composite decking and railing and leader in high - performance , low - maintenance and eco - friendly outdoor living products and a leading national provider of custom - engineered commercial railing systems , today reported financial results for the first quarter ended March 31 , 2021 . " Sustained demand for Trex Residential products and accelerated market share gains from wood drove first quarter sales growth , laying the foundation for another year of strong double - digit revenue growth in 2021. At the same time , capacity expansion at our new state - of - the - art manufacturing facility in Virginia is coming on faster than originally anticipated . We now expect all lines in our new plant to be fully operational by the end of May , thirty days ahead of schedule . When completed , our capacity expansion investment will provide approximately 70 % more capacity when compared to 2019 volume levels and will give us an important competitive advantage in today's dynamic composite decking marketplace . The additional capacity further reinforces our position as the industry leader and most efficient manufacturer of high performance , wood - alternative decking and railing , " said Bryan Fairbanks , President and CEO .