yes he will make you draftstop behind the top plate to concrete wall, if there aere any soffitts at the soffitt level is where you would draftstop.
5/8" drywall works also and a little cheaper than plywood. done the same wayBest way to do the top plate firestop is to snap your line for your playe, leaving maybe 1/2 to 1 inch clear. Cut a rip of plywood 4 inches wide and nail it up first, sliding it til it touches the block wall. Then nail up your 2x4 plate to the line. Won't matter that the plwood is short of the line, its only there to close up the gap behind the top plate.
:thumbsup:just got done today with a basement bath draftstop and I like to use un faced insualtion and foam it in.