Over the years there has been a decay/sewage (woody/egg?) smell eminating from my bathroom. The odor would almost exclusively occur at night, when the temperature dipped below 50-40F. I just had my whole bathroom remodeled (new tub, tiles, everything), and the smell has become much stronger, yet still only at night (it did occur during the day in the winter, when dark and stormy). It stinks right now, yet yesterday it didn't smell at all. It's making it into the rest of my apartment.
I live on the top (3rd floor under attic) of a walkup/garden apt type building, which has had a history of backed up pipes on the ground level. I asked my downstairs neighbor about the odor and she says she doesn't smell it.
Any ideas? This one is particularly hard to identify because it happens almost exclusively at night. It doesn't smell like it's coming from the pipes.
Should I call a plumber on this, or do people think it might be the walls themselves? Moving is becoming very attractive right now...