Chimney build - anyone have a problem with this?

[JB Thompson]

I don't know that I have a problem with it...but I've never seen one built like this before.

From here, the chimney passes through the roof decking and is about 5-6 ft higher than the decking. Unfortunately, I was not able to climb that portion of the roof to be able to examine the chimney up close.

[Jerry Peck]

I'm thinking those flue tiles look like Isokern and were not made for that, but ...

... as I was searching trying to remember the spelling of Isokern, I found this: http://earthcore.co/images/manuals/2009-12-17-StandardFL-Web.pdf - see page 4 and page 28 (page 28 shows a "brick ledge"). Also shown on pages 36 and 37, maybe other pages too.

[JB Thompson]

It pays to know people who know things :D

Thanks!