Reply To: Is teak deck as good as experts say? June 29, 2018 at 9:24 am #605 Karl Harrison Landscapes LtdModerator As long as it is over 750 Kgs Cubic Metre then yes… younger and less dense teak, although Tectona Grandis, it may not have developed the preservation oils that older trees have. It is Durability class 1… so is Accoya®… but Accoya®is warranted for 50 years against rotting above ground… now that takes some beating! There are other modified timbers that are being used for similar high end installations of course, such as Accoya®, Kebony® and Lignia® This reply was modified 2 years, 5 months ago by Decking Network. This reply was modified 1 year, 11 months ago by Karl Harrison Landscapes Ltd.