#11  
Old 06-19-2009, 12:34 PM
Master Builder
 
Join Date: Mar 2008
Location: Washington State USA
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Default Re: Should I clad the walls and dome?

Can you reach all places of the interior to do any repairs (should they become necessary) with that wide an opening? I would suggest that if not then you might wish to make it wider now. A necessary repair that cannot be reached would perhaps mean a major tear down and rebuild. If you can, then all is well.

Wiley
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  #12  
Old 06-19-2009, 02:49 PM
Abear's Avatar
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Location: Tomball, Tx
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Default Re: Should I clad the walls and dome?

I'm starting to get confused I got the CD from Rado in Australia and have been following his measurements - the width of his ovens ranging from 16.5 - 17". I've been getting a lot of comments here stating this may be too small an opening (never even thought about repairs!). I could stretch it out to 19" still maintaining the 62-64% ratio, but I wonder if it would be too wide resulting in heat loss. I've also decided to add a cladding layer around my large firebricks for structural stability (not necessarily for mass). As such, the use of foil is warranted.
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  #13  
Old 06-19-2009, 02:53 PM
Il Pizzaiolo
 
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Location: USA
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Default Re: Should I clad the walls and dome?

the picture is deceiving,,, it doesnt look that wide,, what are your internal measurements ?
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  #14  
Old 06-19-2009, 02:58 PM
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Default Re: Should I clad the walls and dome?

The hearth bricks are 9 x 18 x 4 making my internal dimensions 36" x 36". Dome arch rises 8.25", opening arch rises 1.75". Width of opening planned at 16.5".
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  #15  
Old 06-19-2009, 03:41 PM
Il Pizzaiolo
 
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Location: USA
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Default Re: Should I clad the walls and dome?

hey abear,,
that sounds good... i have a 42 inch round with a 20 inch door.. i think you are fine.. the picture looks like the whole thing is small to me,, maybe i just need to put on my glasses.. keep up the good work and happy cooking
Mark
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  #16  
Old 06-19-2009, 07:35 PM
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Default Re: Should I clad the walls and dome?

I know what you mean..the bricks are HUGE and make it look smaller because of the lack of brick lines. Plan to clad around the walls tomorrow to shore them up for arch work later in the day!
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  #17  
Old 06-28-2009, 08:49 AM
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Default Re: Should I clad the walls and dome?

Decided to cover dome with 1.5" refractory cement (Quikrete with fireclay added in). Finished the back wall arch and partial sides made out of vermicrete. Plan to use same forms for front once I finish brickwork around opening. Fill will be with loose vermicrete (4" on sides, 6+" on top). I just wish this 100 degree heat in Houston would let up!! It's been a bear keeping the concrete damp while curing..
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  #18  
Old 06-28-2009, 06:08 PM
Il Pizzaiolo
 
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Default Re: Should I clad the walls and dome?

lookin good.........
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  #19  
Old 07-15-2009, 04:28 PM
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Default Re: Should I clad the walls and dome?

I've finished forming the vermicrete walls and brickwork on the chimney. I want to stucco over the vermicrete exterior but wonder if I need to use diamond mesh over the vermicrete. The vermicrete looks rather porous and I think the stucco might adhere well to it but I have no experience with stucco. Has anyone used stucco on vermicrete?
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  #20  
Old 07-15-2009, 04:53 PM
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Default Re: Should I clad the walls and dome?

"wonder if I need to use diamond mesh over the vermicrete."

I used an acrylic stucco directly on the vermiculete with no mesh.
Its very thick but goes on with a paint brush. The first coat tends to mostly cover the vermiculete but you see little holes develop. The second coat covers it well. Leave the third coat until after the curing process - the dome will tend to expand and develop small cracks which this third coat will cover.

The acrylic stucco is the most water "resistant" of the various stucco types (and it is available in various colors).
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