I have a house that is 103 years old. It has been remodeled in the past. There is a smell in the house. It doesn't bother me, but I live there. However, it bothers my MIL and she insists that it is a bad smell that makes her eyes water. There are leaks in the roof and there has been some water damage. The roofer came this weekend and did a fair patch up job and we are working on funding for a new tin roof. I am going to put a box fan in the attic to get the air up there moving and dry things out a bit. Could the smell be coming from this? The fact that the house is just old...or a grumpy MIL?