Hi all,
Been curing my oven over the last few days and today I've had a medium fire burning all day long as I need to cure the ceramic fibre mastic I used to insulate my dome. (I used 4 layes of 128kg3 25mm CF blanket and then finished with 25kgs of ceramic fibre mastic). For those who haven't used it, the mastic is like plaster but is made from ceramic fibre. We used rigidizer on the blanket then slapped on all the mastic with a troul and keyed it to form a scratch coat. With the heat from the all day fire today it has now hardened and is pretty much ready for the final layer of stucco. With an internal temp of 450 degrees the outside is registering about 50, so I think my dome is well insulated! However the underside of the oven, sticking my hand under the hearth, is quite hot, registering about 160 degrees. I'm a little bit concered that so much heat is being sucked out of the floor, not just for the efficiency of the oven but also for the ability to use that area for wood storage, I guess if I have a very hot oven I could run the risk of starting a fire under there? I used the standard 2" of CF board (or isol board as you guys across the pond call it). So my question for you all is what temps you register from the underside of your hearth, is 160 degrees alarmingly high? Thanks for the input.
gaucho
Been curing my oven over the last few days and today I've had a medium fire burning all day long as I need to cure the ceramic fibre mastic I used to insulate my dome. (I used 4 layes of 128kg3 25mm CF blanket and then finished with 25kgs of ceramic fibre mastic). For those who haven't used it, the mastic is like plaster but is made from ceramic fibre. We used rigidizer on the blanket then slapped on all the mastic with a troul and keyed it to form a scratch coat. With the heat from the all day fire today it has now hardened and is pretty much ready for the final layer of stucco. With an internal temp of 450 degrees the outside is registering about 50, so I think my dome is well insulated! However the underside of the oven, sticking my hand under the hearth, is quite hot, registering about 160 degrees. I'm a little bit concered that so much heat is being sucked out of the floor, not just for the efficiency of the oven but also for the ability to use that area for wood storage, I guess if I have a very hot oven I could run the risk of starting a fire under there? I used the standard 2" of CF board (or isol board as you guys across the pond call it). So my question for you all is what temps you register from the underside of your hearth, is 160 degrees alarmingly high? Thanks for the input.
gaucho
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