Sorry for bringing up this thread, but I have the same problem, but is pretty much the whole year around.....
There is no obvious holes from the front or lost tiles, it is more a case of them getting in from the tiny gaps between the last tile and the fascia...
I went up and tried to plod up some gaps with expandable foam filler, but to no avail....
Like I said they are not in the loft, they seem to be in the void space between the felt and the last tile...around the area of the fascia board..
Getting really annoying now..
Any ideas? Electronic deterrent?
There is no obvious holes from the front or lost tiles, it is more a case of them getting in from the tiny gaps between the last tile and the fascia...
I went up and tried to plod up some gaps with expandable foam filler, but to no avail....
Like I said they are not in the loft, they seem to be in the void space between the felt and the last tile...around the area of the fascia board..
Getting really annoying now..
Any ideas? Electronic deterrent?