During renovation of the the top floor kitchen, a section of this wall was opened up to gain access to plumbing and to run new electric up from the basement.
Now that a section of that wall is open I can occassionally smell sewer gas.
I do not smell it in our bathroom (of course there is a bathroom and kitchen on each floor where the tenants live and I have not journey into their apts). I smell it in only in the wall.
Any suggestions on how to determine where the smell is coming from? How can I figure if it's coming from a hole/crack in the waste stack, or the vents?
Thanks for your help!