#21  
Old 08-01-2007, 01:07 PM
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Default Re: High Heat Loss

Sorry about your problem, it sounds like the experts on this forum are giviing you options to address it.
I was wondering if you could tell me more about the right side of the structure. It looks like you added a smoker. What is the slot below it for?
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  #22  
Old 08-01-2007, 01:23 PM
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Default Re: High Heat Loss

The right side is actually a bbq but you could use it as a smoker as well. The bottom is just for wood storage.
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  #23  
Old 08-01-2007, 05:34 PM
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Default Re: High Heat Loss

Question from peanut gallery: What about adding a stone floor over the firebrick? I realize you'd lose interior space but would a second floor with even minimal insulation keep the slab from wicking so badly?

Also, it the dome itself is embedded in uninsulated concrete isn't that wicking off heat the same way the slab is?
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  #24  
Old 08-02-2007, 09:59 AM
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Default Re: High Heat Loss

I am going to try installing some insulation underneath the oven floor.

What would be better to use Insulfrax, SuperIsol or anything else?
Also anyone know where I can purchase SuperIsol in Canada?
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  #25  
Old 08-02-2007, 11:26 AM
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Default Re: High Heat Loss

JC,

Look under the Vermiculite Prices thread for a supplier of calcium aluminate board (similar to SuperIsol) in Concord, Ont. (Keele St. north of Hwy 7). The name of the company is Alphatherm, and all the details are in that thread.

Jim
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  #26  
Old 08-07-2007, 12:03 PM
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Default Re: High Heat Loss

Would you recomend SuperIso over Insulfrax for insulating under my oven floor?
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  #27  
Old 08-07-2007, 12:34 PM
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Default Re: High Heat Loss

JC,

They are similar products in that they are calcium silicate based. However, I'd say you wanted a rigid cal sil board; SuperIsol is just one name for it. The boards would be easier to retrofit and glue to the underside of your oven. Insulfrax is calcium silicate batt material used to insulate the oven dome, and it's flexible for that reason.

Jim
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  #28  
Old 08-07-2007, 09:26 PM
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Default Re: High Heat Loss

Just had a thought...was the floor constructed inside the oven or did you rest the walls on the floor bricks. If the floor was constructed inside you might be able to remove the floor bricks and cut a sheet of superisol or calsil to fit inside the floor and then reset the bricks. It might affect the door height to dome ratio but perhaps you could reset the floor using splits in which case your thermal mass in the floor would be reduced but...the benefit of the insulated floor might be worth more in the long run?
Best
Dutch
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  #29  
Old 07-27-2009, 08:55 PM
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Default Re: High Heat Loss

I have made the same mistake in regards the hearth insulation (on 2 inches of sand and a 4" slab) ..I had no idea about this forum either!
I had an idea that might work but I`ll ask here first.. I was thinking along the lines of insulated cement tiles about an inch thick..I would have to make them in a small form sandwiching the the insulating board on all sides inside the cement.. No idea yet if they would crack or not but thought that if it works then I would have an oven that I could use for bread or Pizza`s by simply placing or removing the tiles..
Do you think this could work?
I live in the Philippines so might have some problems finding the insulating board..
What If I just made them from a perlite cement mix?
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  #30  
Old 10-14-2009, 01:55 AM
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Default Re: High Heat Loss

This sounds good, can you share a link of your invention?
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