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Old 01-07-2010, 08:13 AM
Pete VanderLaan's Avatar
Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
Join Date: Apr 2002
Location: Chocorua New Hampshire
Posts: 22,268
Pete VanderLaan is on a distinguished road
I have a real problem with putting material under something that weighs 2000lbs that is soft like Insblock or fiber. I think it is just asking for a shift off of level. I can see building it with an outer foundation load bearing wall and filling in the central area with better insulating materials, but not ever using them in a load bearing part..

Floors of furnaces are the most neglected part of them. It is a huge face for heat loss and it is never in our consciousness since we can't see it or feel it. It's there. It needs at least eight inches of insulation.
Where are we going and why am I in this basket?
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