mystery sewer gas smell !
It is driving me crazy!
When I use the upstairs bathroom I will come downstairs and often smell sewer gas smell coming from the room below the bathroom.
Now, we replaced the ceiling in that room a year ago and I am 99.9% sure there are no leaks. Sometimes I smell the gas in the upstairs hallway also and it seems very "temperature" related. It happens more in the hot summer than the cool fall and winter. I sometimes will smell it in the hallway even if I didnt' use the bathroom and it seems to be an early morning thing or late evening thing.
Now, we have a c 1850 farmhouse. We just replaced the tub faucet so I know the piping runs through the inside wall and that the wall is not insulated. I was thinking that somehow the smell was in the attic and that when the hot water is on it heats up the air and starts to rise and the smelly air from the attic falls down to the first floor or the upstairs hallways. Of course this doesn't explain why the smell would be in the attic. We have one turn-style vent in the attic, and the occasional soffit vent but I suppose this isn't enough.
We do have a vent pipe that sticks up out of a roof extension so it is possible that the stink could be getting sucked into the roof soffit. It is really difficult to see this vent because of the location. My husband said he saw it when he was cleaning a gutter though and he couldn't reach it because of the location of it on the roof. However it IS NOT on the highest part of the roof.
But first of all, does my theory sound plausible or not? Anyone else have any ideas?? Does one vent produce THAT much stink??? We are hooked up to a city sewer system. I figure that vent works for the kitchen sink and upstairs bathroom and that it may be tied directly into the main sewer pipe, judging by the location. We have a second downstairs bathroom that has it's own vent.
thanks for you help!!!