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mongota - Thanks you for the response. I'm going to try an idea out, and if it fails then I will follow your advice and move backward to move forward.
My idea is to purchase use 3 pieces of Stainless sheet metal to isolate the chimney landing from the chimney itself. My notion is that 2 pieces will be attached to the inner and outer portions of the chimney landing, keeping them isolated from each other while providing a level, smooth base for the chimney. Then I'll place one rectangular piece of SS above without anchoring it, and finally I will anchor the chimney to the upper SS sheet, using the stair-step brick method to build the smoke chamber and taper to the anchor plate.
I do not think I will need any gasket material. The idea is that the plates will provide less friction for movement, while the brick weight of the smoke chamber will provide a stable foundation for the chimney structure. I'll insulate and stucco around the smoke chamber base for added stability and to keep it from slipping out of alignment with the opening.
My two concerns with this approach are that repeated heating and cooling could cause a missalignment between the chimney and the opening in the arches. I think experience will tell, and if it doesn't work then I can deconstruct this part and try something different.
My idea is to purchase use 3 pieces of Stainless sheet metal to isolate the chimney landing from the chimney itself. My notion is that 2 pieces will be attached to the inner and outer portions of the chimney landing, keeping them isolated from each other while providing a level, smooth base for the chimney. Then I'll place one rectangular piece of SS above without anchoring it, and finally I will anchor the chimney to the upper SS sheet, using the stair-step brick method to build the smoke chamber and taper to the anchor plate.
I do not think I will need any gasket material. The idea is that the plates will provide less friction for movement, while the brick weight of the smoke chamber will provide a stable foundation for the chimney structure. I'll insulate and stucco around the smoke chamber base for added stability and to keep it from slipping out of alignment with the opening.
My two concerns with this approach are that repeated heating and cooling could cause a missalignment between the chimney and the opening in the arches. I think experience will tell, and if it doesn't work then I can deconstruct this part and try something different.
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