#1  
Old 02-07-2010, 01:15 PM
Peasant
 
Join Date: Jan 2010
Location: Cheshire UK
Posts: 36
Default expansion joint?

Hello

I've seen some examples (can't remember where!) of a gap between the inner dome and the cosmetic brick work. It sounds logical to have one I suppose.

Has anyone used one? what did you plug the gap with?

Any hints-tips will be appreciated

Mick
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  #2  
Old 02-07-2010, 01:50 PM
Master Builder
 
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 575
Default Re: expansion joint?

I think I understand your question.
Insulation goes on the outside of your oven bricks, then the cosmetic brick work. Lots of insulation. Then you can have a gap or not. I don't think it matters. The builders who used stucco to finish the top of the oven used no gap.
Hope this helps.

dusty
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Old 02-07-2010, 01:58 PM
Peasant
 
Join Date: Jan 2010
Location: Cheshire UK
Posts: 36
Default Re: expansion joint?

Thanks for the reply ... maybe I should have explained my query better

I mean where the hearth and the chimney work meets the outer/cosmetic brickwork

Mick
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Old 02-07-2010, 02:24 PM
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Default Re: expansion joint?

Mick,

I didn't use one, but when you mortar the brick, you almost get one by default. The mortar isn't going to be solid between the two bricks. I did separate the brick from the flue about two inches and filled the gap with vermiculite/portland for insulation.

Les...
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Old 02-07-2010, 03:11 PM
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Default Re: expansion joint?

I just put a piece of foil to create a slip joint there. You could use the flat stove door gasket material if you wanted to get fancy. There's also a quarter inch version of the insulating blanket, but I'm sure you'd have to buy the whole roll.
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