I own my own terraced house, one of the adjoining houses is privately let and the new tenants are smokers, when they smoke in the house the smell comes up through the floorboards.
I have lived here for over ten years and both houses have had major renovations including victorian hearths removed and new rear extensions. I believe removal of a hearth on either or our side or theirs has left a gap under the houses which causes the problem. The smell is worst in my bathroom and living room where the hearth used to be. The new tenants moved in a couple of weeks ago.
Am I being unreasonable to expect the landlord of the neighbouring house to sort out this hole to stop the smell coming through? Should I speak to the tenants? I guess it is unreasonable to ask them not to smoke in their kitchen (which seems to be where the smell comes from).