After a long layoff building our pompeii 42 oven we're finally getting back at it. When we stopped our dome was complete and we're now getting ready to complete the archway outside the dome and attach the terra-cotta flue to the vent opening. After that we'll insulate w/ FB blanket and some vermiculite concrete and top it off with waterproof stucco in igloo form. Our first question is when attaching the very heavy flue to the vent opening should the rectangular flue be parallel or perpendicular to the oven door or doesn't it matter. Second, when attaching the flue how much of it should sit on the vent bricks, a half inch or more? I'm very worried about the weight of the flue on the arch. Is there an additional way to support the arch so that it can support the flue? Should a course of fire bricks be mortered to the bottom of the flue? I read in the pompeii instructions that the flue can't be "attached" to allow for expansion of the flue during fireing of the oven. So how exactly does one secure the flue?I've attached a few photos of the oven. Next, I was wondering what if any affect the weather over the past year has had on the oven dome. We left it uncovered while we waited to get back to working on the project. We live in Delaware so it's been exposed to a few snow storms and rain. It was covered with a layer of refractory cement. Any ideas? I was wondering if once we finish the oven opening vent and attach the flue should we build a small low fire in it prior to insulating to see if any smoke comes through the dome to indicate a crack. Thanks for any help or ideas.
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Questions Re Attaching Terracotta Flue