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Post by moorsy on May 11, 2012 22:55:27 GMT
inside Attachments:
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Post by moorsy on May 11, 2012 22:57:05 GMT
concrete cladding over foil with steel mesh Attachments:
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Post by moorsy on May 11, 2012 22:57:59 GMT
that's it so far.... Attachments:
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Post by turkey on May 12, 2012 9:06:15 GMT
welcome aboard and what a cracker, very grand.
design wise I think you have done well, I would have gone for full concrete hearth, the vermiculite layer which bar being brittle is supposed to have very good compressive strength and often used under ovens, however they would be regular Pompeii ovens not Alan Scotts which will weight a lot more due to all the extra thermal mass.
glad to see you are making it your own :-) don't worry you would need the neck of a swan to be able to see those top inner corners, I have the same for the transition where effort and cutting was bypassed to just get it in, it will not affect the performance and I bet it looks better then expected from the inside .
lucky man to have a friend with kiln insulation and connections,
can't wait to see how it progresses and this promised first born ;-)
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Post by cannyfradock on May 12, 2012 13:13:25 GMT
Moorsey........Indeed !!! Brilliant build.
As much as I admire Allan Scott's design's I also don't like the set up of those suspended re-bar's. I'm yet to build a Barrel/vault oven and am a bit intimidated on the vault arch transition.......you've done a great job.
I can understand your frustration if you used Fondue cement on your arch construction. Arches can be difficult to get right even if you mark the arch former when not in situe. I would only use fondue on a Pompeii build "without formers"....nice to see you got there in the end.
Great build.....looking forward to your next stage build.
Terry
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Post by umhloti on May 13, 2012 7:23:53 GMT
Hi Moorsey.
Lovely build .
Where did you get your fire clay from?
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Post by moorsy on May 13, 2012 9:55:57 GMT
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Post by moorsy on May 13, 2012 11:46:14 GMT
I am in East Meath so it was a bit of a trek for me for just clay but they were the only place I could find it. I haven't used the insulation yet so can't tell you much about it. Have a few days off work coming up so planning to put it on then, will let you know.
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Post by umhloti on May 13, 2012 11:57:55 GMT
So we are almost neighbours . See your PM
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Post by moorsy on May 20, 2012 20:18:11 GMT
Started my first small fire to dry it out. This was the first of 3 over 3 days and no cracks! Attachments:
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Post by moorsy on May 20, 2012 21:30:27 GMT
Started the front. Lesson learned: wear gloves when using lime, it burns! I started out wearing gloves then took one off to work faster. Result was I now have no finger prints on left hand, I'm sure they will grow back Attachments:
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Post by moorsy on May 25, 2012 23:44:00 GMT
Update and a question!
I have applied the thermal blanket and covered that with chicken wire ready for render. I have read that you can use perlite instead of sand in the render. I have mixed some render already with sand and it is very heavy. I am worried that the weight will either squash the insulation flat or too easily move and crack. Any suggestions for render mixes?
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Post by turkey on May 27, 2012 16:00:48 GMT
Pearlite is used for an insulation render I believe, but not in anyway water reistant infect will act as a sponge. I believe a lot of builders go blanket then vermiculite render (similar to pearlite but more corse) then outer render. You could run a crust round with pearlite and then revert to sand?
Also I think for the final render folks do it in stages, so the initial layer compressing the blanket is only thin, this is then scratched up so the next layer can be applied but this should prevent further blanket compression.
I think advise for someone who has actually done this might be worth while here as I have not fully researched it yet myself.
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Post by umhloti on May 31, 2012 8:16:28 GMT
Looking Lovely Moorsey . I had the chance to go and look at Moorsey WFO. Thanx for the friendly reception and chance to see your WFO. Any more news on the Insulation blanket
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Post by cannyfradock on May 31, 2012 19:56:15 GMT
Moorsy
As Turkey mentioned. we usually follow the system of Fire-brick, thermol blanket then vermiculite concrete/render......then a waterproof render/K rend.
The vermiculite is mixed with cement and water and applied to the blanket about 3" thick. It is similar to odd shaped polystyrene but has thermal properties. This is very light and should not compress the blanket. It dries to a hard crust and perfect for the final render coat. (best way to mix the "vermecrete" is to empty 1 or 2 100ltr bags into an empty 1 ton jumbo bag and add a half bucket of water to it the night before. The following day add the cement ....about half a bag to 100ltrs ...and pull the sides of the jumbo bag back and forth for ease of mixing. It is difficult stuff to work with and some people use marigold gloves to apply it. I have never used perlite but it will act in the same way......perhaps you may also have to add sand to perlite, to get it to hold together?
Terry
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