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  #11  
Old 09-27-2012, 08:33 PM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
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Default Re: Dome insulation

The lime in the mix gives the render some elasticity and also has the ability to "heal" tiny cracks in the render.
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  #12  
Old 09-27-2012, 10:45 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
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Default Re: Dome insulation

Fibertex 650 is not ceramic fibre, it is rockwool. Loves to suck up moisture.
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  #13  
Old 09-29-2012, 05:58 PM
cobblerdave's Avatar
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Default Re: Dome insulation

Gudday Johnny the oven man
I know you have 30 yrs experience in the refractory industry so I'm interested in knowing more about why Rockwool loves to suck up water?
In my limited experience I have found that firebrick ceramic insulation render in fact all materals in my oven will soak up moisture even from the humidity in the air


Regards Dave
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  #14  
Old 09-29-2012, 10:07 PM
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Location: Melbourne Australia
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Default Re: Dome insulation

Dave, c/fibre dries out better than rockwool. The batts just dont really recover very well after soaking. Fibre is as good as gold after immersion, dries out to its original configuration, probably becuase it goes through a process called "needling" during its manufacture. Yes I know that all the insulation materials do absorb water, they are all porous.

Last edited by Johnny the oven man; 09-29-2012 at 10:10 PM.
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