 Re: Bottom insulation on corrugated steel dries slowly?
I'm not surprised that the steel plate heats up: After a "white" firing of my oven the bottom of the four inch cast concrete support slab is warm to the touch, and steel conducts heat a lot better than thick concrete does.
As Dutch says, it may be a moisture issue. The first month of firings will drive any residual moisture out of the vermiculite concrete. I don't think you need to drill any drain holes: the firebrick floor is porous, and will let any released water vapor escape. |