Are there buyers for this
there is also a low expanding foam on the market, 1 inch of foam is = to 6 inches of blown insulation
You can rent a blower and hoses to do it, They sell snap in plugs to fix the holes. Vermiculite is more expensive than cellulose, but if a mices can't make tunnels in it, it re settles. Wear a dust mask whichever you use. I did a house in indiana and saved the cost of insulation and storm windows in three months.
Vermiculite is perhaps one of the few natural insulators there is. It is mined and comes out flaky like fish scales. It is heated and expands. Any blown insulation you use either does not fill all the way or eventually settles. Vermiculite is no exception. But short of tearing out all of your walls, it would be your best bet.
vermiculite has been used for insulaition, but it is now known to be cancer causing.
