my neighbor put in a wood burning stove last year and since then I have had a layer of soot on all my stuff in my loft. I live in a semi detached house and we share a chimney breast. Our fires are off set from each other. I don't know if the soot is just coming out of the top of the chimney and blowing up under our eaves or if it is coming in through the chimney breast in the loft.