In my attic is an accumlation of 100 years of dust and soot - the kind of stuff that you don't want to get in contact with anything else cos it'll stick to everything and keep you cleaning up every nook and cranny, forever. It's trapped beneath and over the fibre insulation which rests between the joists, on to which is affixed a lattice+plaster ceiling from below. I figure I'll need to remove and bag up the insulation for the bin and then clean out the dust from the lattice and the joists before laying new insulation.
I've been trying to work out a way of effectively cleaning the dust up without fouling up the rest of the house. I've hired an industrial cleaner from HSS which was OKish for part of the job, but I found it worked no better than a Henry (losing suction very quickly), it just had a larger capacity. Further it's too big to access most of the space that needs cleaning. Also the bags kept bursting/tearing, which meant I had to use a second vacuum cleaner to clean up the first and that didn't keep the dust under control to the degree I wanted.
I know it's a tall order, but is there a solution that will provide me with a long hose (minimum 10 metres from main unit if no larger than an HSS "medium duty" vacuum cleaner, or longer otherwise) through which I can extract (vacuum) a heavy accumlation of dust (it's up to 10cms thick in places), along with occasional loose lumps of plaster from the lattice, whilst keeping that dust sealed up and contained for easy disposal, without having to do messy bag empties every five minutes. I don't mind spending to get this done right, so long as that buys me a solution that will keep the dust contained, once it's lifted.
Otherwise, what professional/industrial cleaning service should I be seeking?
TIA.