If you use Menards Status brand or the similar stuff from Fleet Farm, or if you use marine grade carpet, you do not need to pre-cut a hole or melt a hole for the screw, simply pre-drill through the carpet, plywood and aluminum framing and run your screw, the carpet in those pictures is more of a woven carpet, but with the stuff I mentioned above, it's made differently and has NEVER un-raveled for me and I've screwed in thousands and thousands of screws through the stuff.