Decks.com. North Dex Decking Reviews
North Dex Decking Reviews. North Dex composite decking is manufactured by Master Mark Plastics in Albany, MN. The evalucation service report number is ESR-1461. This wood plastic composite material is coated on 3 sides with a PVC skin. They are sold as 5/4x6 deck boards and come with a 20 year warranty.