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  #211  
Old 08-17-2013, 06:48 PM
Il Pizzaiolo
 
Join Date: Jan 2012
Location: Australia
Posts: 1,053
Default Re: house brick for stand, quick quetsion

Hi Crocau

Sounds great, out there cooking and eating makes the challenges re cracking go away. Just keep eating the mind will eventually forget those annoying aberrations.

I'm guessing same will occur with my build, for all the effort I believe I still will get cracking occurring.

I will miss having the WFO usable by my sons 21st on 21 Sep. Flue not due until 15 September. So I will not be able to start curing until around then without taking annual leave.
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  #212  
Old 10-29-2013, 09:04 AM
Apprentice
 
Join Date: Apr 2013
Location: Australia
Posts: 155
Default Re: house brick for stand, quick quetsion

hi all, going to do colorbond roof this week or week after and I got dektite for sealing around my flue but i'm little bit worried about flue temperature, would i be right that it goes over the 250C that red dektite is rated for?
so i'm now thinking about getting putting 2nd flue over my existing 7" and then using dektite to seal that instead
any tips on doing double flue would be great, or any tips at all
thanks guys
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  #213  
Old 10-29-2013, 02:28 PM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,880
Default Re: house brick for stand, quick quetsion

The red decktite is sufficient, unless you overload the chamber and have flames going right up the flue pipe.
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  #214  
Old 10-29-2013, 02:33 PM
Apprentice
 
Join Date: Apr 2013
Location: Australia
Posts: 155
Default Re: house brick for stand, quick quetsion

Oops, I didn't expect that answer, So no need for doing double skin just use red silicone dektite around my flue?
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  #215  
Old 10-29-2013, 03:05 PM
Il Pizzaiolo
 
Join Date: Jan 2012
Location: Australia
Posts: 1,053
Default Re: house brick for stand, quick quetsion

Hi croc
I believe regulations stipulate that any flue going through a roof anywhere near a wooden structure needs to be triple skin. I had to do that with a combustion hater treats ago. And regulations usually become stricter over time not more lenient. I would go double skin route, or check with a combustion heater retailer
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  #216  
Old 10-31-2013, 04:14 AM
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Join Date: Apr 2013
Location: Australia
Posts: 155
Default Re: house brick for stand, quick quetsion

roof is all metal including posts and frame so i should be ok with that
i worked out that if i line up colorbond to my flue i can mark it within 1-2mm and cut it out with nibbler then i will just use high heat silicon, if i keep my gap around flue really close this should be all i need i figure

ALSO in other news, i started fire today after oven being exposed to rain for few weeks because i got sick of putting tarp back on it with all wild winds we been getting where at one stage i almost lost huge sliding door glass due to one of bricks i had holding tarp down went flying with tarp at my house.
oven got soaked multiple times (thanks melbourne weather) so i was expecting drying fires for few days but it looks like i reached cooking temperatures without any problems, I started small so walls didn't get black all the way to the bottom so i'm not sure how to read dome clearing in such situation but after one hour dome started to clear up from top as normal, quite happy with that, one i have my roof i will have no problem with cooking no matter what weather is out there
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  #217  
Old 11-01-2013, 07:22 AM
Apprentice
 
Join Date: Apr 2013
Location: Australia
Posts: 155
Default Re: house brick for stand, quick quetsion

I got tip for new oven builders out there.
STOP stressing too much.
if you review my thread from the start you might notice I worry about everything and some more and i do it ahead of time as well to make it even harder for myself.
well, today i got oven that was exposed to rain for few weeks and when i say rain i mean BIG rain, it got wet everywher, dome, floor, you name it.
I also got cracks, arch, dome, perlite render, main slab, you name it and it got crack in it and i'm expecting more cracks in final render one day BUT NON of that matters when you cook delicious pizzas and believe me when you see thermal expansion in action as your oven gets hot during big fire you will know that there is no oven without cracks or should i say expansion joints.
you can avoid some issues but they wont ruin your day so pick your battles wisely because no matter what you going to enjoy it unless you use superglue instead of mortar or do something just as stupid
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  #218  
Old 11-03-2013, 07:20 PM
Greenman's Avatar
Master Builder
 
Join Date: Feb 2013
Location: Bundaberg. Australia
Posts: 849
Default Re: house brick for stand, quick quetsion

Quote:
Originally Posted by CrocAu View Post
hi all, going to do colorbond roof this week or week after and I got dektite for sealing around my flue but i'm little bit worried about flue temperature, would i be right that it goes over the 250C that red dektite is rated for?
so i'm now thinking about getting putting 2nd flue over my existing 7" and then using dektite to seal that instead
any tips on doing double flue would be great, or any tips at all
thanks guys
I have an 8" flue and had a 10" outer pipe and cowl made for that. I made the hole in the colorbond roof neat and tight and used silicone to seal it. The stainless doesn't get so hot and this set-up has been operating for some time and is holding up fine. The flue pipe exhausts above the seal at roof level and the temp of the roof at the sealing point doesn't get much above ambient.

A local sheet metal workshop charged me $90 for the outer chimney pipe and cowl.

The silicone had the same heat rating as the red dektite and was considerably cheaper. I think there is always a temptation to over engineer these things.



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  #219  
Old 11-04-2013, 06:50 AM
Apprentice
 
Join Date: Apr 2013
Location: Australia
Posts: 155
Default Re: house brick for stand, quick quetsion

I like what you done that, I was looking in your thread on the photos but don't recall seeing the one from above.
that is the finish on top that i'm aiming for but Is there any reason why i couldn't/shouldn't just go single flue? tube of silicon i got from Ben is rated to ~500C
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  #220  
Old 11-22-2013, 08:24 AM
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Join Date: Apr 2013
Location: Australia
Posts: 155
Default Re: house brick for stand, quick quetsion

just small update, almost done now
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