[davo69]

look at room and seel worke men in untill they have got pannels down then they can exit .if you left window open you risk spreding all over you dont want any drafts at all.if they dont brake pannels no risk .dont forget any pannels they are removing damp down first this will decrease any dust .i worked for a recycling company for two years this is good practice.main thing to remember is that tiny contact is not harmfull working all the time with it is. that is why any one who knows what they are doing will take all precortions possible when pannels sre removed they should vacume up the area with a vacume that does not let any air loss hope this helps but dont worry u will be fine.