Hi all, currently doing the bedroom out. We are insulating the walls that's why battening worked out cheaper than getting the insulated plasterboard's. I have put all the vertical battens up 400mm centers, from floor to ceiling. Also put a batten along the center where the 2 boards will butt up. Is there any need to put a batten up the top of the wall as well as the bottom? using 12.5mm boards. Many thanks in advance any advice will be greatly appreciated