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Old 01-28-2013, 11:28 AM   #1
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Insulation on Basement Celing


Hello

As you see in the second picture, a natural gas pipeline going through a hole in the subfloor connecting to my natural gas fireplace on the main floor. Could i use Roxul (safensound) insulation to cover the hole? just use the one batt to cover the entire section between the two joists?

Also, could i use the same thing and stuff it behind and below the fireplace, (below the firebox, itself, in the space that the natural gas pipeline goes through. (first picture)

thanx for your help in advance

PTMD
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Old 01-28-2013, 10:01 PM   #2
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Insulation on Basement Celing


Do you require an outside air source for combustion, did you check with manufacturer on insulation guidelines?

Gary

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Old 01-29-2013, 09:27 AM   #3
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Insulation on Basement Celing


i dont think so, the ignition (or spark area) is contained within the firebox and the firebox itself has a direct vented system (double barrel - exhaust in the middle barrel and intake on the outside).
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Old 01-29-2013, 11:53 PM   #4
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Insulation on Basement Celing


Air-seal the holes in the metal with metal plates and rubber grommet to allow movement in case of seismic zone, canned foam the OSB flooring hole on the protective sleeve only, keep any clearance to insulation required by stove manufacturer. Nothing inside the f.p. housing. I'd change out the f.g. on the rims for rigid foam/canned foam to stop the air infiltration/exfiltration; Insulating Rim Joist - caulk or spray foam around edges?

Gary
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Old 01-30-2013, 09:42 AM   #5
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thank you, but what are the acronyms you are using? f.p. f.g.
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Old 01-30-2013, 03:14 PM   #6
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Insulation on Basement Celing


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thank you, but what are the acronyms you are using? f.p. f.g.
Fire Place

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