I have an old fireplace which has had the chimney removed by the previous owners. The chimney finishes at the loft floor but has been left completely open leaving a large void connecting the loft area and the room below.
Currently there is just a large hole from the loft floor down to the fireplace in the room below which is a magnet for draughts and dust.
Everything I read suggests you must let an unused chimney breathe but I'm wondering if this just applies to chimneys which still have the pots going through the roof and if I can safely seal off the bottom or top of this fireplace to prevent draughts?
Keen to keep the fireplace in the room as a "feature" if possible