Our Forest Garden decking has been pressure treated with a preservative and carries a 15 year guarantee against rot. This means that the item will never need to be treated, saving both time and money and helping the environment by reducing the amount of chemicals used annually. The product can still be painted or coloured if desired as the preservative and dye is pressure impregnated within the wood at the manufacture stage and will not be affected by further painting or colouring. Please note the guarantee will only apply if the product is installed and maintained in accordance with Forest Garden guidelines.