Hi Laura, Thank you for the question. What we used was a cultured dry stack stone. The original fireplace only went to 6ft. tall so we framed up the rest to the ceiling and installed our concrete backerboard to that to be flush with brick. We also installed wiring and reinforced framing for TV mount in upper section before backerboard. Then we just set stone over the existing brick and all the way up the wall. Hearthstone was used for the top of the hearth box which is the seat area of the fireplace. The hearthstone should be sold along with stone. You will need corners for stone as well if your building it out from the wall. Good luck with your project!

WoW! Thank you!