just wondered how many dabs you lot use to one 8x4? the bloke i work with used to use 5 rows of 4 but i've managed to persuade him to do 6 rows of 4 now as i thought the gaps between dabs were too big. you get 2 boards per bag, but surely its better to have too many that not enough. just had a quick look on the BG website and they do 3 continuous bands vertically then fill in the skirting and ceiling lines. opinions please?