Insulating Terracotta 6 Inch Flue in Brick Chimney Opinions

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Den034071
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Post by Den034071 » Thu. Apr. 06, 2017 10:43 am

Guys I have a chimney jog coming up for owner .Chimney will be on sunny side of house .Most of day the sun is will be on new Brick Chimney .How about your opinions . Waste of time or not /. Plan is to pour Vermiculite around 6inch terra cot. flue jack

 
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2001Sierra
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Post by 2001Sierra » Thu. Apr. 06, 2017 10:46 am

I insulated mine 36 years ago. It is inside the house and I poured in a white mineral insulation available at the time, it can only help especially with coal's low stack temps.

 
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freetown fred
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Post by freetown fred » Thu. Apr. 06, 2017 1:05 pm

That's one of them--ya mights well--for myself, nah!! for a customer--yep--eliminates any POSSIBLE future situations. Give em hell Jack!! ;)

 
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Rob R.
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Post by Rob R. » Thu. Apr. 06, 2017 7:16 pm

Did not insulated the liner on my brother's chimney and have always regretted it.

cost of the vermiculite can't be much...I would definitely do it.


 
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Post by jw9190 » Fri. Apr. 07, 2017 8:38 am

Rob R. wrote:Did not insulated the liner on my brother's chimney and have always regretted it.

cost of the vermiculite can't be much...I would definitely do it.
Rob R. you can find vermiculite chimney insulation mix online. I used Rockford Chimney's because they had free shipping. Hope this helps. https://www.rockfordchimneysupply.com/chimney-insulation-mix-everguard.php

 
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Sunny Boy
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Post by Sunny Boy » Fri. Apr. 07, 2017 8:57 am

Retaining heat in a chimney is a plus for both coal and wood.
Keeping the chimney warn reduces the chances of creosote condensation/buildup with wood. And it allows a good draft with a slow running coal fire in warmer weather.

Paul

 
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Post by Olllotj » Fri. Apr. 07, 2017 10:52 am

i wouldn't doubt that it is a good idea, the more draft the better, and I guess that if I was building mine again I would add it. (i can only imagine having a 3rd mortar pan to mix, seeing as there is already the block mortar, and high heat mortar for the tiles to keep up on)

For me, we did a double wide flu, so there was a lot of mortar to mix per day.

But, my 40' interior chimney lined with 8" square terracotta has no problems keeping a draft.

I would focus on getting it to be the highest thing in the area.

Here's a link to mine. Progress starts on pg 3.

Building a Chimney for a Kb8 Boiler

 
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coaledsweat
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Post by coaledsweat » Fri. Apr. 07, 2017 12:07 pm

There is no reason to insulate an interior chimney, especially a forty footer.


 
Den034071
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Post by Den034071 » Fri. Apr. 07, 2017 12:26 pm

uys owner a carpenter has R 11 batts from his job .I am building him a oversize chimney 20 in by 20inches .For a 6 in flue .He asked can the pink batt insul. be used as it is free.Please your pro an cons .jack

 
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coaledsweat
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Post by coaledsweat » Fri. Apr. 07, 2017 12:43 pm

Fill it with vermiculite. That amount of glass would be pricey and probably will settle over time.

 
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freetown fred
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Post by freetown fred » Fri. Apr. 07, 2017 1:26 pm

Indeed it can be Jack. No safety issues there! Free is the best & will do the job nicely. Just make sure ya got a good cap/piece of slate on upright bricks. Ya don't want the pink getting wet, it'll settle!
Den034071 wrote:uys owner a carpenter has R 11 batts from his job .I am building him a oversize chimney 20 in by 20inches .For a 6 in flue .He asked can the pink batt insul. be used as it is free.Please your pro an cons .jack

 
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Post by waldo lemieux » Fri. Apr. 07, 2017 1:38 pm

pros
> free
> its better than nothing

cons
> the vermin will render it useless if they can get at it
> likewise w/ moisture
> Im guessin theres others as Ive never seen it done before....

 
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Post by Keepaeyeonit » Fri. Apr. 07, 2017 5:54 pm

Hi Jack, I would not use wall insulation as the others have stated even If Its free. I insulated mine when I relined it with Perlite and couldn't be happier, I always have draft to spare no matter what. I paid $9.60 per 4 CUFT bag so Its not pricey so I would do It.
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