#11  
Old 09-04-2012, 05:28 AM
WhO WhO is offline
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Default Re: 33" WFO South Australia build

This is the concrete polisher i used - Concrete Wet Polisher Grinder Diamond Cup Wheel & Pads | eBay

Re the insulation I've got 2" of Calcium Silicate board under the oven for insulation and a insulating blanket ready to go over the dome once its done. I was advised that only 1" was necessary under the oven but after reading here and on the forno bravo plans i figured bumping it up to 2" was a small expense best spent now rather than looking back wondering if i should've added that extra board. It might be overkill but it gave me peace of mind!

Cheers,
Rob
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  #12  
Old 09-05-2012, 12:50 AM
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Default Re: 33" WFO South Australia build

Thanks Rob, polisher looks interesting

Think 2inches is heading in the right direction, that was my mistake on first oven.
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  #13  
Old 09-06-2012, 02:49 AM
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Default Re: 33" WFO South Australia build

Got some more done on the oven yesterday and today. Managed to finish the dome yesterday which was a great sense of achievement I did make the mistake though of trying to tuck and point some of the brick gaps in the dome and then trying to clean the mess that i made. Essentially the inside of my dome isn't anywhere near as clean as it was nor as i'd like it to be but oh well!

Today managed to finish most of the front arch, rain kept getting in the way so i only got a little bit done.

Next up is to finish the dome, insulate it and render

I've been wondering if i have enough insulation for the dome though. I only have one box and the place i got the materials from reckons that it will be plenty, the benifits of a second box worth of insulation apparently hardly worthwhile? They build wood fired ovens as a profession and do a good job of it so i'm tempted to leave it at that but i'm also tempted to put a second layer on.

I'm also wondering how effective fiberglass insulation would be as a second layer. If the ceramic insulation is keeping the bulk of the heat in then the second layer of insulation would not be exposed to the higher temperatures so it would likely still be within its working range. hrmmm...
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  #14  
Old 09-06-2012, 04:00 AM
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Default Re: 33" WFO South Australia build

Rob,
On the topic of fibreglass insulation I used it for my first oven and although it worked ok it is really soft and compresses really easily which negates its insulating properties and makes it really difficult to render against.Don't use the stuff with foil on one side, all it does is trap moisture inside your oven insulation layer. If you cover it with chicken wire then add a layer of vermicrete over it you will have a firm enough surface to render onto, presuming you are doing an igloo.if you are doing an enclosure you can just stuff the fibreglass in the gap between the ceramic blanket and the sides of the enclosure.
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  #15  
Old 09-06-2012, 05:11 AM
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Default Re: 33" WFO South Australia build

Rob,
Not sure what your paying for a box but you can get it locally for about the $80 mark. Shooting for 2inches cover would give you more benefit, meaning cooking for longer for the next day or so.
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  #16  
Old 09-06-2012, 07:56 AM
WhO WhO is offline
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Default Re: 33" WFO South Australia build

Damon,

I presume your using ceramic insulation? Where abouts are you buying yours from?

Cheers,
Rob
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  #17  
Old 09-07-2012, 12:22 AM
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Default Re: 33" WFO South Australia build

Go see Frank at Avero...... West suburbs

A pic in my latest build has the brand....isolite
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  #18  
Old 09-08-2012, 04:21 PM
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Default Re: 33" WFO South Australia build

like your polished concrete counters
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  #19  
Old 09-10-2012, 02:55 AM
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Default Re: 33" WFO South Australia build

Thanks Russell!

Went and saw Frank at Avero today, great bloke! I'd Definitely recommend him for anything refractory related!

Also went to Air Diffusion agencies today and got a flue sorted. Got home and welded up a base for it to seat into and as i finished the front arch yesterday i promptly got them all installed on the oven!

All thats left now is to insulate and render
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  #20  
Old 09-11-2012, 12:15 AM
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Default Re: 33" WFO South Australia build

Yeah he is... got my calsil and blanket staring at me in the shed wish I had more time...argghh.

Might have to try air diffusion, the HVAC guy at my work reckons they are pretty good.
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