we're working for a builder at the minute, rip down, board and skim a huge ceiling. he pulls up with fireline boards on his van and i thought nothing of it, got talking to his 18 year old son who works with him and told him we only use fireline when we need to. then said thats all they ever use, even on walls.he said i'm wrong to use normal board most of the time and that fireline are better. when i asked why he said 'cus theyre better' then he said theyre easier to cut and you have less waste. ??? then he told me im wrong for cutting boards with a knife and tape because i wont be able to cut it straight enough ;D i just said oh right, how long have you been plastering then? he still thinks hes right bless him!