Hi all
I’ve googled for hours without success… If anyone can help, that'd be wonderful.
My oven’s exterior seems way too hot. About a month ago I finished a 1.07metre (internal diameter) brick oven, with the following insulation:
· Dome - 75mm ceramic fibre blanket (3 layers) followed by 50mm concrete render (the first 20mm is perlite mix - my 100L bag ran-out!)
· Base - 100mm ceramic board (2 layers), on top of 75mm Hebel. The floor is overkill, I didn’t want any heat going into the suspended slab, and risk it failing.
Nine days ago I started curing the oven. For the first 3 days I ran at 50 degrees c, the next 2 days higher, but below 100C. I kept the fire running for 5 hours each night. I ramped it on the 6th day. On the 8th day dome started to clear, even though I didn’t plan to bring the temp up that high. So I thought blow it, and ran the oven hard. It’s the 9th day, and its very easy to ramp the temp up. I have no cracks inside whatsoever, not that I can see anyway. I two small cosmetic cracks on the render surrounding the arch, but they appeared before curing.
So all is good, except the exterior is hot enough to be uncomfortable towards the top third of the dome.
There’s no steam to indicate water, and no cracks that’d indicate steam trying to escape. So why is my dome’s exterior still uncomfortably hot?
I would've thought if I cleared the dome (twice), that all the moisture would be gone. I live in a dry and warm area.
Thank you
Brian
I’ve googled for hours without success… If anyone can help, that'd be wonderful.
My oven’s exterior seems way too hot. About a month ago I finished a 1.07metre (internal diameter) brick oven, with the following insulation:
· Dome - 75mm ceramic fibre blanket (3 layers) followed by 50mm concrete render (the first 20mm is perlite mix - my 100L bag ran-out!)
· Base - 100mm ceramic board (2 layers), on top of 75mm Hebel. The floor is overkill, I didn’t want any heat going into the suspended slab, and risk it failing.
Nine days ago I started curing the oven. For the first 3 days I ran at 50 degrees c, the next 2 days higher, but below 100C. I kept the fire running for 5 hours each night. I ramped it on the 6th day. On the 8th day dome started to clear, even though I didn’t plan to bring the temp up that high. So I thought blow it, and ran the oven hard. It’s the 9th day, and its very easy to ramp the temp up. I have no cracks inside whatsoever, not that I can see anyway. I two small cosmetic cracks on the render surrounding the arch, but they appeared before curing.
So all is good, except the exterior is hot enough to be uncomfortable towards the top third of the dome.
There’s no steam to indicate water, and no cracks that’d indicate steam trying to escape. So why is my dome’s exterior still uncomfortably hot?
I would've thought if I cleared the dome (twice), that all the moisture would be gone. I live in a dry and warm area.
Thank you
Brian
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