Composite decking has been on the market since the 1990s, and if used correctly, it can outlast wood decking by many years. The original product was an amalgam of recycled wood chips and plastic, although more contemporary versions combine bamboo with plastic or include an extra waterproofing coating. Composite decking handles much like wood, although you can't sand it. It accepts screws and nails, but the best way to attach it to the deck frame is to use a hidden fastener system. To do so, you need boards with grooves into which to hook the fasteners.
Drive 3-inch decking screws in pairs about an inch from either edge of the board with a drill and a No.2 Phillips bit.
Align the screws by using a ruler to extend the line made by the pair on the previous board to the board you're attaching. Drive both screws on the line.
Sink the screw heads about 1/8 inch below the surface of the boards. Sinking them deeper may allow moisture to seep into the core of the material and swell the wood chips, leading to discoloration and mold.
Using Hidden Fasteners
Screw a special start fastener to the rim joist aligned with the midpoint of every regular joist. Leave the screws partially out and hook the front edge of the first row of boards into the fasteners.
Connect a universal fastener, which has two opposing hooks, to the other edge of each board at the intersection of each lateral joist. Partially drive the screw to hold the fastener, then return to the other edge of the board and drive the screws holding the start fasteners all the way.
Install the next row, hooking the front edges of those boards into the other sides of the fasteners. Install more fasteners on the back edges and partially drive the screws, then return to the front and drive the screws in the first row of fasteners home.
Install all the decking boards in the same way except for those in the last row. For those, you need stop fasteners, which are similar to the start ones. Sink the screws all the way as you install these fasteners.