Composite Decking | Lowe's CanadaResults 1 - 12 of 12 ... Shop for composite decking at Lowes.ca. Find the best selection of composite decking and get price match if you find a lower price. ... 12-Ft Terrain Rustic Elm Grooved composite Deck Board. 12-Ft Terrain Rustic Elm Grooved composite Deck Board. Lowe's Item #: 853344. Model: TCGV5412RE. Width: 5.36in. Thickness: 0.94in. $39.48. Add To Cart. Compare. More Options Available. 1 x 6 Brown Oak Terrain composite decking.