Could you tell me if this situation is normal?
We have a 1919 brick bungalow in Chicago and have lived here for a year and a half. It's our first home. It has the original cement tile roof which is in fair shape, though WAY past service life. A roof inspector said the first three courses have basically no felt left under them, but higher than that it looks ok. There are two roof vents, one on the north and one on the south faces of the roof.
In the winter, when it snows with a blowing wind, snow comes in through the roof vents. I know because I work in the attic, which is mostly finished and there were vents cut into the ceiling of the finished space right below where the roof vents are. Hence, snow in my office. Also, on at least one occasion, there was a fine layer of snow all over the attic insulation as far as we could see.
Now in the summer, I'm dying because the attic reeks of mold when it gets above 85. I suspect the insulation all has to go. But my main question is: should snow be coming in through the attic vents at all? Is replacing the attic insulation at this point throwing away money until we replace the roof? Any insight you might have will be a lifeline.