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Post by bigdavenorcott on Apr 12, 2015 19:46:27 GMT
Hi Vic, how did you split the old red clay bricks, im struggling with a hammer and chisel.... cheers Simon Simon - hope you don't mind me jumping in. I used old red solids, and found the easiest way was to angle grind part way through on either side, then give them a whack with a rubber mallet to snap them off
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Post by miniadventure on Apr 12, 2015 19:55:54 GMT
not at all, perfect !! the bricks are stamped 1895 and have stood the test of time but ive been working my way round them with a bolster and hammer and im only getting a 50% success rate... I have managed to source 160 of the them and my hearth is 700mm internal, not too sure how many i will need.
What did you make your hearth out of? someone said quarry tiles.... as id like to keep everything old and reclaimed, but hard to source.
I wonder if i could use new 100% clay tiles from the local tile merchant, they are 10mm thick and 6" x 6" ?? on top of a thermalite block base.
whats your thoughts? have you had any problems with your oven ?? do you have any build photos?
Cheers
Si
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Post by bigdavenorcott on Apr 12, 2015 21:28:43 GMT
I used fire bricks - got just enough for the cooking floor for cheap from another builder in the area. Storage heater bricks are ideal though - fairly easy to find cheap or free; I've got a dozen if you want them (Hampshire). I've got a shedload of reclaimed quarry tiles that I was considering using and never did too
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Post by bigdavenorcott on Apr 12, 2015 21:31:33 GMT
My build: ukwoodfiredovenforum.proboards.com/thread/1877/You definitely want a thicker hearth than 10 mm. Thermal mass and insulation, insulation, insulation is what it's all about. I got some pretty cheap Calsil board for under the cooking floor, worked great and really helped get a perfectly flat surface
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Post by bigdavenorcott on Apr 12, 2015 21:34:09 GMT
Overall I wouldn't change a thing - except maybe waterproof my scaffolding plank base containment, and make my vermicrete mix more concrete rich from the start so it was less of a pain in the arse to build with
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Post by cobblerdave on Apr 12, 2015 22:22:49 GMT
G'day bigdave Problem with enriching the Portland cement in the insulation mix is that it cuts down the insulation value. Your oven works well so your extra effort payed off. 100 mm 5 to 1 for compressive strength under the floor. 100 mm 8 to 1 over the dome. Davids from the FB forum builds his own line of ovens in Northern Australia. He uses a 50/50 mix of vermiculite and pearlite. The two diferent shapes lock into each other. He also uses a bit of powdered clay in the mix for workability. It's still the Devils poridge but it's cheap enough and avaliable and most important works. Regards dave
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Post by chas on Apr 13, 2015 7:48:45 GMT
What did you make your hearth out of? someone said quarry tiles.... as id like to keep everything old and reclaimed, but hard to source. Si I've not used them, but have a slightly irrational bias against quarries... they seem too hard...may shatter (like flint) but has anyone used them? They're so readily available, it would be good to know if they're useful. Chas
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Post by hennase on Feb 14, 2016 11:12:33 GMT
Hi I'm new to this wonderful subject, that build Vic has my mouth watering, I very much admire your skill because I wouldn't know where to start. Thank you for sharing. H
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