I'm building a house and last fall we had a tile lined brick and block chimney built. It wasn't used at all last year, and we got our woodstock keystone up and running 2 months ago. We were hanging sheetrock upstairs today, and my wife noticed one of the mortar joints looked different from the rest. This looks to me like we have a bad time joint and its leaking smoke into the area around the flue. How concerned should I be, and what would the solution be on what is a really new chimney?
![[Hearth.com] I think I have a problem with a fairly new chimney [Hearth.com] I think I have a problem with a fairly new chimney](https://www.hearth.com/talk/data/attachments/150/150224-d906ead969b631032036059d17e0c86b.jpg?hash=RbtvwmGaNg)
![[Hearth.com] I think I have a problem with a fairly new chimney [Hearth.com] I think I have a problem with a fairly new chimney](https://www.hearth.com/talk/data/attachments/150/150224-d906ead969b631032036059d17e0c86b.jpg?hash=RbtvwmGaNg)