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Insulating gap between oven and outer wall

From the WFO board

Posted by Douglas Brown

I am cladding the outside of my oven with large limestone cobbles 8-14" in diatmeter. As I am going up the outside of my block wall base - I was intending on attaching my stone wall to the base using brickties and still keeping a 1 inch gap. - i am now thinking of providing more support for my stone wall by filling that gap with mortar (or concrete) as the lower portion will probably not get hot anyway.
then when I get to the upper portion - i could put extra insulation on the outside wall and come right out to the stone wall to continue the support - some heat would transfer through the hearth - but I could insulate that gap too - does this make sense?

Insulating gap between oven and outer wall

by Rado Hand on Google+

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