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Old 03-30-2014, 01:39 PM
Serf
 
Join Date: Mar 2014
Location: Ireland
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Default Pizza oven problem?

Hi all. Not to sure where to post this, but need advice.

I built an oven last year and have a vermiculate base(2 inches) and a dome on top with two layers of vermiculate blanket and covered with vermiculate/cement mix. Last year it heated very well and made great pizza.
We have had a very wet winter, and the dome appears damp this year.

Upon firing it does not get anywhere near enough hot anymore. From 400degrees celcius last year, to 100 Celsius this year.

The floor appears to not be heating anymore. There is a firebrick 4 piece floor, covered by a 4 piece dome. I have fired it a few times to try and dry it out.

Any ideas? Thanks.

Geoff.
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Old 04-17-2014, 04:05 AM
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Location: brisbane australia
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Default Re: Pizza oven problem?

G'day Geoff
Sorry that your post has remained unanswered for so long.
You are right its pretty well soaked I'd say. Low and slow fires for a while. That's not so bad you can bake some really nice meals. As it drys and starts to give you the higher temps...Back Off .. And be patient. It will come good with time.
Regards dave
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Old 04-17-2014, 04:30 AM
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Default Re: Pizza oven problem?

Your cladding is made from vermiculite/cement? That is an insulating mix, and if you don't have a stucco shell over it, there's no wonder your oven is saturated. Any pics?
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Old 04-17-2014, 04:44 AM
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Thumbs up Re: Pizza oven problem?

There is a valuable lesson to be learned here.
Your oven obviously works fine when properly dried out and over the winter or wet period, it absorbs water which retards it's performance. As vermiculite will absorb moisture out of the air and readily absorb water that comes into contact with it, you will need to dry it out again and slowly, but most of all protect it from doing it again. Build a cover over it or wrap it when not in use to ensure that it does not get wet nor able to absorb the high humidity of moist air.
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Old 04-17-2014, 04:45 AM
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Join Date: Mar 2014
Location: Ireland
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Default Re: Pizza oven problem?

Thanks for the replies folks. I have lit a couple of fires. And it has improved slightly. I hope to get it going this weekend as we have a bank holiday here and hopefully it will improve further.
With next winter in mind:
The stucco people talk of, can this be bought anywhere? Us it paint? Or should I put a sand/cement mix over it first, then paint it?

Thanks.
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Old 04-17-2014, 04:46 AM
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Default Re: Pizza oven problem?

To note, I had it covered all winter with a bbq pizza oven specially for it. But we had a lot of rain. So that could well have soaked it non the less.
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Old 04-17-2014, 03:07 PM
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Default Re: Pizza oven problem?

G'day
Stucco is the American term. Render is probably the term that you use in Ireland. Sand, portent cement, lime, and it should be available in a premix form.
Regards dave
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Old 04-17-2014, 03:51 PM
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Default Re: Pizza oven problem?

Not exclusively American, but render is interchangeable universally.
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Old 04-17-2014, 06:02 PM
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Default Re: Pizza oven problem?

Here in South Oz, we don't use the terms interchangeably.
When we speak of render, we generally mean a smooth exterior coating of cement/lime/sand mixture that is trowelled flat.
When we speak of stucco, especially if the guy holding the trowel is of Italian (Molfettese) descent, we are generally speaking of textured exterior finishes.

Wiki says stucco was traditionally textured for appearance, then the definition of cement render is so similar its all the same stuff as far as I can see.

In any case, being an Aussie, I'd render an igloo shaped oven, not stucco it.
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Old 04-17-2014, 06:35 PM
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Default Re: Pizza oven problem?

G'day
Well if that's the case its stucco for me ...... The texture surface hides the imperfections in my finish
Regards dave
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