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Old 03-26-2007, 09:37 AM
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Location: hull,england
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Default waterproof motor?

does the motor used to lay the dome have to be waterproof, im tring to find a high heat motor here in england and not havin the best of luck, not many people have it but have seen this fire cement ready mixed but only in 2kg pots, but it doesnt say about it being waterproof its like a fire place cement can it be used ive added the linkhttp://www.everbuild.co.uk/products.phb?

i know ill proberbly need about 50 tubs of this stuff but its only cheap
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Old 03-26-2007, 09:50 AM
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Default Re: waterproof motor?

Leeth,

Think a little more info is needed here. If you mean does the mortar that you use to lay up the dome bricks need to be waterproof, the answer is no. You use refractory mortar for that. After the dome has cured, it must be insulated in one of several ways. After that, you can either make an igloo shape or build a steel stud enclosure. Here's where the waterproofing comes in; you have to keep the insulation and the oven dry. There are waterproof stuccos out there, or you can paint the exterior of your finished igloo. A steel stud enclosure should be finished off with a waterproof roof with enough slope on it to shed water. Am I on the right track here? If I remember what the weather in Hull is like, waterproofing will be an issue.

Jim
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Old 03-26-2007, 10:04 AM
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Default Re: waterproof motor?

yes you are i wasnt certain about the waterproofing part of the motar can i use the fire cement in the link to lay the bricks on
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Old 03-26-2007, 10:05 AM
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Default Re: waterproof motor?

One more thing. If you are having trouble finding refractory mortar, or it is crazy expensive, you can make your own high heat mortar with Portland cement, sand, lime and fireclay. It's less expensive and it can be easier to find. There is a section in the Pompeii plans that talks about the trade-offs and gives you the recipe for making your own mortar.

Jim really is right on the waterproof part. Once your oven is done, you have to keep water away from the oven and insulation with a waterproof enclosure.

James
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Old 03-26-2007, 10:21 AM
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Default Re: waterproof motor?

i think making my own would proberly be better i can get portland cement, sand do you soft sand for regular bricklaying and i can get portland lime not to sure on the fire clay is this easy to find
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Old 03-26-2007, 10:36 AM
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Default Re: waterproof motor?

James, Leeth,

I think Leeth should get in touch with Alf to source materials in the UK, though he hasn't been active for a while. Why don't you send him an email?

Jim
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Old 03-26-2007, 10:43 AM
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Default Re: waterproof motor?

is alf in the uk
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Old 03-26-2007, 10:45 AM
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Default Re: waterproof motor?

how do i find franks email
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Old 03-26-2007, 10:50 AM
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Default Re: waterproof motor?

Yes, he's in Cumbria. Alf's doing fine, and installing Forno Bravo ovens, building trailer pizza ovens, etc., and keeping very busy. But it's true, he has not been here. Hmmm. :-)
James
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Old 03-26-2007, 10:52 AM
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Default Re: waterproof motor?

sorry i mean alfs email
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