Home filled with flies--are they getting in chimney?
Anytime the weather warms up (we live in super cold climate) we have a huge surge of flies coming into our house--to the point they are covering our windows--hundreds of them. I have had to start vacuuming them up several times of day. I have checked windows--none are open. The only place I can think they are coming from is our fireplace cap on the roof. Is that possible? I know it is rusty so I'm not sure if that would be reasonable? The flue is open but they seem to get in even when I close it. I have seen flies crawling around the fireplace opening. I was quoted $400 to replace it. Could I do it myself? Doesn't seem that complicated? Has anyone had flies come in like this before?