I tore down old wood paneling and the Sheetrock behind it is somewhat damaged. I decided to just put 3/8" blue-board over the old wall. My question is. I want to put beadboard paneling half way up the wall. Should I put blueboard over all of the wall or should I just put it on the top half since the bottom will be beadboard. I just don't want a large difference in size between the paneling and new wall.