Re: New 36" Pompeii at Bundaberg
I would make a collar several inches high, out of the next-size-up flue pipe, and seal that to the roofing. Then pass your single-wall flue through, leaving an air gap, and finish with a conical 'storm collar' to keep the weather out of the gap. The gap will reduce heat conduction to the roof, and allow for expansion/movement of the roof and flue.
I would make a collar several inches high, out of the next-size-up flue pipe, and seal that to the roofing. Then pass your single-wall flue through, leaving an air gap, and finish with a conical 'storm collar' to keep the weather out of the gap. The gap will reduce heat conduction to the roof, and allow for expansion/movement of the roof and flue.






I sealed the roof/chimney with high heat silicone and it works a treat. I was surprised at how cool the lower portion of the outer pipe stays.

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