[Greenbuilding] Outsulating chimneys -- was Re: Fireplace options

[Corwyn]

On 10/5/2012 6:05 PM, Bob Waldrop wrote:

> Does "outsulate" mean you think we should put some kind of insulating
> material over the brick? I'm guessing not the chimney that's within the
> conditioned space, but the chimney that is in the attic and in the air
> above the roof?  What kind of insulation materials would you recommend
> for this?  I had not thought of the chimney as a thermal bridge.

No need.  'Outsulating' should only be done if the chimney breaches the 
insulation, such as a wall.  This is common with chimneys on an outside 
wall, the brick is exposed on the outside, and is basically the only 
thing between the room and the outside.  Insulating it on the outside 
moves the whole chimney into the heated space (as it should be).

Thank You Kindly,

Corwyn

-- 
Topher Belknap
Green Fret Consulting
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