In preparation for the installation of LVP flooring, I am raising the floor 1/2" to match that of an adjoining room's tile floor. The plan was to lay down 1/2" plywood over the existing 3/4" plywood subfloor and fasten with #8 1-1/4" wood screws. The issue I'm running into is that many of the screws strip out before the head countersinks flush with the surface. I have tried a couple brands without a ton of success. Any suggestions on how to overcome this problem would be greatly appreciated.