Originally Posted by
Mr. Widget
I don't know if asbestos is safer or not, but particles in the 5 to 7 micron range are the most dangerous... larger ones are flushed and filtered out, and I guess the smaller ones are absorbed. The problem with asbestos is the shape of it's particles along with the fact that it tends to break down into quite a lot of particles in this dangerous size range.
Whether fiberglass is as dangerous as asbestos or not, it certainly should be treated with respect, and you should always wear a respirator, not a silly dust mask, when working with the stuff.
Widget