Re: Just another Aussie Oven
Hughness, this gave me a bit of drama as well. I ended up casting/moulding with refractory concrete.
I left a big gap in the arch, with the sides sloping inwards. Then I jammed (technical flue building term) a bit of tin underneath to follow the internal curve, and put an 8 inch plastic plant put in there. Then I poured in the concrete, and when it was firm removed the plant pot and put my flue on. I cut about 25mm slits along the bottom of the flue, bent them out at 90 degrees and placed it on the spot, then moulded a bit more concrete around to hold it in place.
To date, no major cracks, and if the bond between the bricks and concrete separate, the angle of the bricks means gravity will help hold it in there. It sounds agricultural, but works a beauty.
I'm lucky - I built my oven so the flue passes a few foot within my shed roof and was able to put a stay across to help hold it.
Hughness, this gave me a bit of drama as well. I ended up casting/moulding with refractory concrete.
I left a big gap in the arch, with the sides sloping inwards. Then I jammed (technical flue building term) a bit of tin underneath to follow the internal curve, and put an 8 inch plastic plant put in there. Then I poured in the concrete, and when it was firm removed the plant pot and put my flue on. I cut about 25mm slits along the bottom of the flue, bent them out at 90 degrees and placed it on the spot, then moulded a bit more concrete around to hold it in place.
To date, no major cracks, and if the bond between the bricks and concrete separate, the angle of the bricks means gravity will help hold it in there. It sounds agricultural, but works a beauty.
I'm lucky - I built my oven so the flue passes a few foot within my shed roof and was able to put a stay across to help hold it.
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