Insulation Near Chimney

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Vic99

Minister of Fire
Hearth Supporter
Dec 13, 2006
857
MA, Suburb of Lowell
My stove is on the first floor of the house and my brick chimney is lined with an insulated 6 inch steel flue.

Looking up from my basement, I noticed that I have two different soccer ball sized holes between the first floor's flooring and the chimney. Can I stuff insulation there without having to deal with melting or combustion? I'd like to stop air flow, so I'd like to try and cut foam board and then cover it with fiberglass, just to be sure. Does that seem sound? Other suggestions?

Thanks
 
Use fiberglass insulation, no backing. If you're really concerned about it, use rock wool.
 
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