I have been looking in the forum, but didn't find any mention of this:
When I went to get my firbricks, the guy asked me if I wanted hydraulic drying mortar (I gather this is cement based and hardens as it cures) or ceramic drying mortar (which reaches its final strength through heat and only after the oven is fired). The Pompei plans obviously use cement based, but will the other stuff work too?
The thing is, this guy gave me an I-was-building-ovens-when-you-were-still-wearing-diapers look and I ended up with the ceramic sort. He said it was better, because it expands and contracts with the rest of the oven when heating up, so you don't get cracking others have mentioned. He also assured me that it was easy to build with. So what is the down side? Has this been discussed on the forum before? What have I bought???
Frances
When I went to get my firbricks, the guy asked me if I wanted hydraulic drying mortar (I gather this is cement based and hardens as it cures) or ceramic drying mortar (which reaches its final strength through heat and only after the oven is fired). The Pompei plans obviously use cement based, but will the other stuff work too?
The thing is, this guy gave me an I-was-building-ovens-when-you-were-still-wearing-diapers look and I ended up with the ceramic sort. He said it was better, because it expands and contracts with the rest of the oven when heating up, so you don't get cracking others have mentioned. He also assured me that it was easy to build with. So what is the down side? Has this been discussed on the forum before? What have I bought???
Frances
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