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Post by nomoreheroesanymore on Aug 8, 2017 16:40:56 GMT
Hi all , wife is nagging me to build a WFO and I had sort of settled on the barrel / vault style. On reading some of the posts on here I noticed that there seems to be some problem with the structure of this type around the base due to expansion. I was planning to use blue engineering bricks for the dome ,starting the curve at hearth level rather than have a couple of vertical courses first and also interlocking the bricks to increase bonding strength. Does this sound like a good idea?
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Post by devontiger on Aug 8, 2017 17:02:23 GMT
Buy one, end of nagging.  £395 on ebay. 90cm wide. |
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Post by nomoreheroesanymore on Aug 8, 2017 17:14:42 GMT
Had considered this option but they are too wide to get into my back garden.
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Post by downunderdave on Aug 8, 2017 21:25:37 GMT
Hi all , wife is nagging me to build a WFO and I had sort of settled on the barrel / vault style. On reading some of the posts on here I noticed that there seems to be some problem with the structure of this type around the base due to expansion. I was planning to use blue engineering bricks for the dome ,starting the curve at hearth level rather than have a couple of vertical courses first and also interlocking the bricks to increase bonding strength. Does this sound like a good idea? The reason the hemisphere has become so popular for he past two thousand years is its structural integrity. Many folk think a barrel oven would be easier to build, but in fact because of the buttressing or bracing required, actually becomes more difficult to build. If this consideration is omitted your oven will still work, but may not last for generations. If you only use it occasionally it maybe ok but the constant heat cycling and expansion/contraction will eventually expose any structural deficiencies. |
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Post by nomoreheroesanymore on Aug 11, 2017 17:38:54 GMT
Thanks downunderdave. Would it still be ok to use firebricks on the hearth and blue bricks on the dome?
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Post by downunderdave on Aug 11, 2017 19:25:12 GMT
Hi Hero,
Yes it should be, but not guaranteed. It is impossible to tell a bricks thermal shock characteristics by looking at it, but generally engineering bricks prove to be adequate for the dome, but you are wise to stick with firebricks for the floor which take a greater beating there. Building the whole lot in firebrick gets expensive. The downside is that engineering bricks have a greater degree of vitrification making them harder to cut than firebricks.
Dave
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