Q-Deck Cambridge style decking is made from high quality certified softwood. Its finished size after machining is 20.5 x 95mm and is a reversible profile. Having one smooth face it is a very versatile decking board as it can be used for a variety of external applications. It is particularly suited for creating the facia edges to decks. Being the thinnest in the range it is the most economical per square metre but please note you need to use more supporting joists. It is preservative pre-treated with Tanalith.