Worried about air sealing fireplace attic vent cavity
I'm an insulation contractor and I also try to close up the "big" air sealing holes before we blow in additional loosefill insulation. I want to close off the enormous cavity the builder left for the fireplace vent stack. My concern is how does a fireplace draw fresh air from combustion? Do I need to leave this cavity open to prevent back drafting?
Thank you for your responses.
Posted Dec 3, 2012 9:10 PM ET
Edited Dec 4, 2012 9:13 AM ET
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