You probably already know and do this but just in case.
Have a spray bottle filled with water, every now and then spray into the air in the dusty room/area.
It helps collect the dust and it settles better - also helps if the dust is making you cough x
Years ago I had a whole chimney breast taken out, it went from the kitchen into the bedroom above, amongst a load of other work.
Apart from taping all round the wardrobe doors (brilliant idea from the builders) this was the top tip of the whole thing