Species this iroko decking comes with side grooves so you can fit it with hidden decking fasteners iroko decking originates from africa and is an exotic hardwood iroko is extremely durable and rich in color and appearance with time it will naturally weathers to a beautiful brown chocolate color which will give your garden a special exotic zenic look the iroko decking is unaffected by insects fungus acids or alkalis making it ideal for decks and other outdoor architectural elements decki