Fixing weatherboard, start by set 5mm gap from head flashing and dumpy level to all side of the walls, use string line or piece of weatherboard and set to that 5mm mark and check for level. Set out story rod for the house with spacing of weather board (in our case 162mm) and transfer the marking from the 5mm mark above head flashing all the way down. We can then chalk line every 162mm mark when fixing weatherboard