I asked my chimney guy about a block off plate and he recommended that instead of a plate that I stuff standard fiberglass insulation, with the paper removed, up there. He said the only time he has seen the stuff even melted a little was the result of a chimney fire. I went to Lowes and everything I found said not to put closer than 3" from steel chimney pipe. Is there a heat rated insulation? What do you guys think?
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