[Greenbuilding] air sealing a metal fireplace flue

[Alan Abrams]

the manfr is crystal clear on prohibiting any insulation in contact with
the pipe.  the primary concern is air sealing.  the chimney chase itself
can be insulated , without touching the pipe.

Alan Abrams

*certified professional building designer, AIBDcertified passive house
consultant, PHIUS*
*certified passive house builder, PHIUS*
Abrams Design Build LLC
*sustainable design for intentional living*
cell     202-437-8583
alan at abramsdesignbuild.com
www.abramsdesignbuild.com


On Tue, Jan 21, 2014 at 4:27 PM, Frank Tettemer <frank at livingsol.com> wrote:

> Hi all,
>
> Kermit's point is well taken. Ask your Code enforcement officer.
> In addition, the other source to inquire with is the Chimney Manufacturer.
>  Each chimney maker has their own, fire-tested details that need to be
> followed precisely, in order to assure safety.
>
> For example, many chimneys, including Selkirk, Excel, and Security all
> require NO Insulation of any kind to surround the exterior of the outer
> metal of the chimney.
>
> The reason is that if there is added insulation, the temperature of the
> metal in the chimney parts will be increased by the existance of this
> additional insulation. This can cause the inner steel lining to be hotter
> than the design temperature, and cause metal fatigue and subsequent
> failure.  The manufacturers all must pass certain burn tests, to receive
> their safety sticker, and these tests are nearly always done with air
> movement allowed around the outside of the chimney.
>
> Even that annoying area, where the chimney passes through the roof frame
> and sheathing, underneath the domed roof flashing area, usually must be
> insulation-free. Consult the installation manual of the brand and type of
> chimney you plan to use, before solidifying your plans.
>
> Frank Tettemer
> Living Sol ~ Building and Design
> www.livingsol.com
>
>  Insulation in contact with the pipe is verboten.
>>
>
> *Flammable insulation* or all insulation?  Ask your Code enforcement
> officer.
>
> Thank You Kindly,
>
> Topher Belknap
>
> --
>
>
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