The manufacturer (Evergrain) recommends 2 teeth per inch. Would that mean an 80 tooth 12" chop saw blade and 40 tooth 7.25" circular saw blade?
From ThisOldHouse.com - "To cut composite or plastic decking, manufacturers recommend using carbide-tipped saw blades with 18 to 24 teeth per inch, to reduce friction and prevent the blade from gumming up." 18 to 24 teeth per inch? That has to be a misprint.