Joe,
Balty recently raised the issue of a lack of space for insulation and David had some wise words which may be applicable to your situation:
Quote:
Originally Posted by dmun  … heat rises. A little extra insulation on top is more effective than on the side. Think about your house with the three-and-a-half insulation in the walls and the six inches in the attic. Same principle. |
While my oven didn't get any bigger, I allowed only 4” between the base of the dome and the brick veneer walls which will surround it. Then I read that I should have allowed an extra 1” for thermal blanket as well as the 4” for loose vermiculite. However, there will be only three small areas where the insulation will be a bit thin, and right at the base, so I really don't think it will seriously affect the oven's performance. But as James has suggested, it may be prudent to stuff some additional blanket in these areas and reduce the vermiculite thickness.
Paul.