[christo]

Thanks for the replies.

So I can take the 8x8 tile through the roof. Will probably put some of the FB isoboard around it and flash to the tile.

Will probably then use some of the scrap tile to make a ring around the flue tile and mortar the ring to overlap and seal the flashing. I don't think the flashing will conduct enough heat over 2 inches to cause a problem with the rubber membrane I plan to put on the roof.

As for tile height - I was figuring 18 to 24 inches above the roof? 24 seems out of proportion tall. I'm going with 18 and will test it out before I put on the cap. If I need more - I will just add it.

James, do you have an estimate for tall the hearldsburg oven flue is and how well draws?

See any issues with this plan?

Thanks again!!

Christo