Re: preferred method for screwing composite decking. Sounds like you are using typical decking screws. If so, you need to check out the screws made specifically for composite decking. I can't think of what they are called right now (that ADD thing again), but they are the cat's meow for composite decking.
This article may be geared towards do it your selfers more than someone looking to hire a contractor, but its good to share the knowledge nonetheless. Before
The TrapEase 3 Ultimate Composite Deck Screw is a non-predrilling screw for composite, PVC and Capstock decking with the TORX ttap drive system. TrapEase 3 creates a clean finished …
Simpson Strong-Tie category "Composite-Decking Screws" Sign Up for Our Newsletters Green Building and LEED Frequently-asked questions.
5. Measure to ensure the first deck board is parallel with the outer edge of the deck. 6. Fasten the deck board with composite decking screws along the edge closest to house; drive one screw into each joist. 7. Install a hidden fastener into the edge of the deck plank, placing one at each joist. 8.