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  #141  
Old 09-29-2013, 03:45 PM
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Location: Minneapolis, MN USA
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Default Re: Budget Build 36"

Quote:
Originally Posted by Laspaz View Post
Hi Chip,

Thanks for the reply.

Are you referring to an enclosed oven? I am going to go with an igloo style oven.

The window screen is a great idea! Unfortunately in New Zealand, insect screening of windows is very unusual (much to my American Wife's disgust!) and therefore really expensive.

I did find perlite cheaper ($28) but they want $25 PER BAG to send it to me!

Thanks again,

Bevan
Oh well, I thought they were good ideas....thought you were building a house.
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  #142  
Old 09-30-2013, 10:15 PM
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Join Date: Sep 2013
Location: Waikato, New Zealand
Posts: 78
Default Re: Budget Build 36"

Hey guys,

I tackled the insulation today. Possibly the most frustrating part of the build.

I choose course vermiculite for the best insulation (best vermiculite) and it was a major chore to try and vet it to stick vertically on the dome. I emded up adding a small amount of fire clay to the mix to try and help it stick.

I doubled up my ceramic blanket on top of the dome as it seems like the most likely place to focus the insulation on.

I also have much more vermiculite on top of the dome. Perhaps 5" + 2" blanket.

The sides are about 3" vermiculite. A bit on the light side, but such is life.

Budget Build 36"-dsc03223.jpg

Budget Build 36"-dsc03224.jpg

Budget Build 36"-dsc03225.jpg

Bevan
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  #143  
Old 09-30-2013, 11:43 PM
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Default Re: Budget Build 36"

Gudday Bevan
May have been a difficult job but you have done well and that's as neat a job as you could ask for!
I'm feeling a bit cheated here I was looking forward to seeing you make that pumice stick never seen anyone use it that way.
Seems the strange chimneys with caps are now explained. If you look at the last photo you posted you can clearly see some cement fence posts with caps on a property behind the photo .
Regards dave
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  #144  
Old 09-30-2013, 11:50 PM
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Join Date: Sep 2013
Location: Waikato, New Zealand
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Default Re: Budget Build 36"

Hey Dave, The pumice would have been a nightmare as it is very heavy compared to vermiculite. I do think it was fantastic as the base insulation though as it has no give/bounce like the perlite or vermiculite.

I have decided to do another bag of vermiculite as well, I don't want to lose the round shape of the dome and have a lumpy mess, so I might try and make a straight sided form for the lower 12" and that might work.

I think I may start curing tomorrow afternoon... hmm, will see how bored I get!

Bevan
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  #145  
Old 10-01-2013, 02:37 AM
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Default Re: Budget Build 36"

You'd be better off to wait until the vermicrete dries before either lighting fires or adding another layer.
You can get a surprisingly good surface and form if you tap the vermicrete lightly with the flat of your trowel after placement.
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  #146  
Old 10-01-2013, 06:48 AM
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Default Re: Budget Build 36"

I made a curved trowel to assist in keeping the round shape when I installed my perlcrete but a flat trowel works just as well.
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Budget Build 36"-83b-curved-trowel-4.26.13.jpg  
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  #147  
Old 10-01-2013, 01:02 PM
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Thumbs down Re: Budget Build 36"

Gudday Bevan
Now the time for building/sourcing oven tools, painting the stand, checking out flour and finish the chimney caps. doing anything not to destroy you oven!
All that water that you used in construction is still in there. Yes the cement has partly cured but that water is still there. I litre of water produces 1600 litres steam and that's a lot of destructive force when its trapped in the very pores of that oven.
Just saying
Regards dave
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  #148  
Old 10-01-2013, 07:52 PM
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Default Re: Budget Build 36"

Good advice team!

I held back and did not light the oven today. I took Dave's advice and made the flue cap.

Budget Build 36"-dsc03226.jpg

Budget Build 36"-dsc03227.jpg

I cut some bricks to slot down in the chimney around the flue. Then I filled the flue with vermicrete and capped with poor man's mortar. I am thinking I could stucco on top of that and use some high temp sealant around the flues?

Also, does anyone have an idea for my floor tiles... I want to stick the front row down so they don't fall off. What would be the best for this? I guess the temp at the front will still be too hot for a dab of construction adhesive?

Budget Build 36"-dsc03228.jpg

I will try and work on the tools tomorrow.

How long before I can start the curing process?

Thanks team!

Bevan
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  #149  
Old 10-02-2013, 03:28 AM
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Unhappy Re: Budget Build 36"

Gudday Bevan
How long?..... I don't know.
You base slab is only 3 weeks old . It's certainly not dry as you put a layer of pumise cement over that the next week and its not dried as you have added a hearth and an oven and a insulation layer.
Like I said before ALL of the water you have used in the construction is still there! The cement may have hardened and partly cured but it does mean that the moisture is still there . Cure is a chemical reaction not drying out.
Put a spot light in there and warm it through. Slowly.let the wind and sun help.
We are coming into summer and the warmer wheather let it do the job. Slowly.
I wouldn't think about fire for a coupla weeks .... And then only twigs.
Simply and truthfully if you try to fire that baby, your work and money will just go down the gurgler..
Regards Dave
PS and that means NO more insulation Yet!!!!
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  #150  
Old 10-03-2013, 01:55 PM
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Default Re: Budget Build 36"

Well I went ahead a got a fire going...and then DISASTER!!

Kidding! I am waiting patiently. I have turned my attention to far less exciting tasks such as the lawns and garden. It is spring here and I have lots of seedlings ready to plant. So I am killing time building trellis for tomatoes and cucumbers etc.

The problem is that the oven won't stop looking at me, it is right outside the french doors. I feel like a neglectful parent

Not to harp on with stupid questions, but what did you guys think I could use to stick down my front row of floor tiles?

It's Friday today, so if you are firing up your ovens for pizza tonight, have a slice for me!

Cheers,

Bevan
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