Redwood deck. My contractor installed composite deck screws on my redwood deck. He is now attempting to remove them,and use the appropriate wood deck screws. The problem is they (composite screw)are stripping. How important is it to use the appropriate screws? He wants to leave them in, too much work. He cut the composite screw from underneath and left the deck unattached in places. The deck creaks when walking in areas of cut screws.