So I've just learnt about the hazards of good old MDF. I've just had loads of work done to my house which has involved a lot of MDF - skirting boards, fitted cupboards, architrave. I'm fairly sure a lot of the sawing of the mdf was happening inside the house. I know it is a danger for he workmen cutting it up at the time (they're advised to wear masks etc BUT how much of a danger is it to my family? Apparently the dust is so fine a normal vac will just blow it back out into the air.