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(M) In earlier threads I had considered using clay liners for my chimney but I decided to use simple single wall 6" stove pipe because of it's light weight and the option to use flex elbows to avoid cutting the ridge beam.
(M) If not all the ovens I've seen, certainly the vast majority have the flue centered in front of the "igloo". Because any symmetrical enclosure would have the ridge beam also in the center, I initially saw no option for me to extend the roof over the baker without cutting the ridge beam. Certainly if I used rigid clay liners I would run right into it.
(M) Stove pipe typically utilizes "flex elbows" to change the direction of the flue. They are virtually ubiquitous in most room heating cast iron stoves. By cementing a standard metal collar to the one and only (bottom) clay liner, I should be able to direct the smoke up the flex elbow and into the galvanized 6" steel pipe. The flex elbow(s) allow me to shift the position of the stove pipe enough that the pipe will clear the ridge beam.
(M) Here come a few images to help visualize what I have in mind:
(M) This 1st image shows an arrangement of 2 flex elbows; one on each end of the pipe. I subsequently decided to have both flex elbows arranged consecutively and on the bottom of the pipe. In the above image the pipe is not yet in place. It also shows the tarps on the roof rafters to keep out the rain.
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(M) This 2nd image shows a close up of the 2 flex elbows in the configuration I plan to use. The single red clay liner with a 6" metal collar to direct the smoke up the flue is also visible at the bottom.
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(M) This 3rd image shows that the stove pipe is on one side of the ridge beam. No metal needed to be cut. I will need to shape the bottom of the custom made chimney cap to conform to the roof slope. It has not yet been fired so that should be easy with my angle grinder's thin masonry cutting wheel.
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(M) This 4th and final image is a 3/4 view that I took to show the planned arrangement of firebrick in front of the HardiPlank siding. I will also construct a decorative arch of 1/2 bricks in front of the opening to the oven. The exposed sheet metal in each corner is barely visible. That metal is based on Jim/James' suggestion to block the corners when I pour Perlite over the dome. In order to keep enough of the Perlite insulation on top of the igloo, I may need to mix Perlcrete for just the top.
(M) The roof will first be clad in HardiBacker panels. I have not yet decided what the ultimate top roofing material will be but I'm leaning to interlocking metal roof.
Ciao,
Marcel
(M) If not all the ovens I've seen, certainly the vast majority have the flue centered in front of the "igloo". Because any symmetrical enclosure would have the ridge beam also in the center, I initially saw no option for me to extend the roof over the baker without cutting the ridge beam. Certainly if I used rigid clay liners I would run right into it.
(M) Stove pipe typically utilizes "flex elbows" to change the direction of the flue. They are virtually ubiquitous in most room heating cast iron stoves. By cementing a standard metal collar to the one and only (bottom) clay liner, I should be able to direct the smoke up the flex elbow and into the galvanized 6" steel pipe. The flex elbow(s) allow me to shift the position of the stove pipe enough that the pipe will clear the ridge beam.
(M) Here come a few images to help visualize what I have in mind:
(M) This 1st image shows an arrangement of 2 flex elbows; one on each end of the pipe. I subsequently decided to have both flex elbows arranged consecutively and on the bottom of the pipe. In the above image the pipe is not yet in place. It also shows the tarps on the roof rafters to keep out the rain.
================================================== ===
(M) This 2nd image shows a close up of the 2 flex elbows in the configuration I plan to use. The single red clay liner with a 6" metal collar to direct the smoke up the flue is also visible at the bottom.
================================================== ====
(M) This 3rd image shows that the stove pipe is on one side of the ridge beam. No metal needed to be cut. I will need to shape the bottom of the custom made chimney cap to conform to the roof slope. It has not yet been fired so that should be easy with my angle grinder's thin masonry cutting wheel.
================================================== ====
(M) This 4th and final image is a 3/4 view that I took to show the planned arrangement of firebrick in front of the HardiPlank siding. I will also construct a decorative arch of 1/2 bricks in front of the opening to the oven. The exposed sheet metal in each corner is barely visible. That metal is based on Jim/James' suggestion to block the corners when I pour Perlite over the dome. In order to keep enough of the Perlite insulation on top of the igloo, I may need to mix Perlcrete for just the top.
(M) The roof will first be clad in HardiBacker panels. I have not yet decided what the ultimate top roofing material will be but I'm leaning to interlocking metal roof.
Ciao,
Marcel
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