27x144mm (Nom 32x150) Treated Decking Beckley/Winchester GroovedReeded

Our slow grown Winchester softwood deckboard is preservative pressure pre treated with a built in water repellent additive. Wood swells when it is pressure pre treated with a waterbased preservative as much as 4% of the finished size after machining - and shrinks as it dries. We therefore advise letting the deck boards in particular, dry somewhat before fitting.