Author Topic: Finally a Swedish neapolitan WFO underway  (Read 23896 times)

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Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #180 on: July 23, 2013, 02:34:56 AM »
The first layer of the insulation blanket.
Its called rock wool and is used here in sweden as normal insulation. It can hold heat up to 700 degree celcius without changing.
 I just attached it with some reinforcement bars used for stucco or similar.

By now the oven scares me its so big haha. How will i be able to move it  :D


Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #181 on: July 23, 2013, 02:38:08 AM »
Well now iam in the wait for the flue pipe. But I will try to finish as much as possible with insulation Before that.

I will lose the garage that iam keeping the oven in in 2 weeks so I am a bit stressed.

So what do you guys Think of this insulation plan:

1: 2 inch insulation under vent. 1 inch blanket and 1 inch vermicrete + stucco.

2: Wrap the whole oven in 2 inch blanket

3: Put wire net outside blanket and add vermicrete appr 10 inch on top and 6 inch around dome and 2 inch blanket on top of vent.

4: 1 inch blanket around the vent cap followed by some vermicrete and stucco. Just so it doeas not get to hot.

4: Put wire net outside vermicrete and finish with 3 layers stucco total 1 inch appr.

Thnaks for comments on this..

Offline sub

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Re: Finally a Swedish neapolitan WFO underway
« Reply #182 on: July 23, 2013, 04:32:47 AM »
Hi Faglia,

Your insulation plan look good,

You did not found the rockwool with metal vapor barrier ? maybe try to put aluminum foil on the dome first, and don't compress the rockwool it should be loose to work well (trap the air inside)

Stefano Ferrara looks like poorly insulated from the side:

Quote
A double layer of aluminum and high-density ceramic fiber 25 mm thick between the first wall in firebricks and the final plaster guarantees insulation

refractory bricks 22x11x6cm

outer diameter - ( internal diameter + 2 x brick width ) /2 = insulation thickness

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #183 on: July 23, 2013, 04:35:25 AM »
By the way.
I havent have time to give it much thought but Iam kind of negative towards stuff with negative function like my vent. Feels stupid to isolate it and at the same time not let it go straight up  ;D
So in all hurry i decided to just insulate it a Little bit haha. So now it feels more 50/50. 50% of insulation over dome and 50% insulation over the vent. Pretty good deal for me at this stage!!!
Still i will only insulate over the vent with blanket for testrunning of the oven. If it does not work perfect i can easily take away or add insulation over the dome.
We will see what happens. Iam very curious of how it will work.

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #184 on: July 23, 2013, 04:42:10 AM »
Yes thanks sub.
Also i was thinking now my vent is so big it more feels like a Place for smoke to be stored Before it gets out of the flue pipe.
It does not really feel like a flue pipe bend. Ps. Saying stuff not knowing nothing about draw!!!!

Offline Tscarborough

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Re: Finally a Swedish neapolitan WFO underway
« Reply #185 on: July 24, 2013, 07:43:28 AM »
It sounds like an awful lot of insulation which is not a bad thing so long as you have the room for it. 

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #186 on: July 24, 2013, 01:05:38 PM »
Haha yes the reason for so much on top is just that the vent is so tall. Around 12 inches close to the flue pipe. Thats why the oven will be so big. After measuring insulation will be more like 2 inch blanket and 4 inxh vermicrete...

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #187 on: July 26, 2013, 04:17:32 PM »
My pizza oven master builder partner Besmir was kind enough to shoot some video of the oven and upload them on youtube if anybody wants to see:
The inside of oven:
<a href="http://www.youtube.com/watch?v=tgBIFRPx5WU&amp;feature=youtu.be" target="_blank" class="aeva_link bbc_link new_win">http://www.youtube.com/watch?v=tgBIFRPx5WU&amp;feature=youtu.be</a>

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #188 on: July 26, 2013, 04:45:38 PM »
Some Pictures from insulation process.
First Rockwool covered with chicken wire and hold in Place by wire and 2 reinforcement bars.
Then vertical reinforcement bars and chicken wire around to hold vermicrete in Place.
Room is left on sides of 1 inch for stucco, and 7 mm for Mosaic.
Reinforcement around floor area galvanized steel plate 1 mm. (dont know if necessary but just in case, i took some leftovers).




Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #189 on: July 26, 2013, 04:51:50 PM »
Another video of my vermicrete application on the chicken wire. I had no time to look up how to do it properly so i just did some.
I thought to get the chicken wire in between vermicrete therefore it looks like iam doing the massage  ;D
<a href="http://www.youtube.com/watch?v=GcULk022zcU&amp;feature=youtu.be" target="_blank" class="aeva_link bbc_link new_win">http://www.youtube.com/watch?v=GcULk022zcU&amp;feature=youtu.be</a>


Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #190 on: July 26, 2013, 04:53:43 PM »
By the way my hands doeas not feel good after treating vermicrete this way with no gloves, but i was in a hurry!!!

Offline Tscarborough

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Re: Finally a Swedish neapolitan WFO underway
« Reply #191 on: July 26, 2013, 11:08:16 PM »
The vermiculite is not an issue, the cement is.  Wash your hands in vinegar after doing that, or better yet wear gloves.  Not only does it destroy your skin, you can get poisoning from the cement.

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #192 on: August 05, 2013, 11:06:44 AM »
The oven is taking shape...
Iam using lots of rockwool since its light and cheap.
Waiting for the flue pipe then ill finish the rest.
The oven looks more and more like the acunto and its because i got the vent measurments from craig.

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #193 on: August 05, 2013, 11:11:28 AM »
I have been firing the oven and the vent works fine.

My biggest concern are my medium duty fire bricks on the floor. I saw this fault to late on the forums.
We will see how it works and what i could do about it if it will be a problem?

Offline Tscarborough

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Re: Finally a Swedish neapolitan WFO underway
« Reply #194 on: August 05, 2013, 04:33:43 PM »
Most use light duty firebricks, so it shouldn't be an issue.

Offline shuboyje

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Re: Finally a Swedish neapolitan WFO underway
« Reply #195 on: August 05, 2013, 04:55:41 PM »
He is concerned with their thermal conductivity of 1.7.  I personally would not worry about it until it is an issue.  If it becomes one there will be ways to fix it.
-Jeff

Offline sub

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Re: Finally a Swedish neapolitan WFO underway
« Reply #196 on: August 05, 2013, 05:18:56 PM »
The oven is taking shape...
The oven looks more and more like the acunto and its because i got the vent measurments from craig.

Indeed, It look likes an Acunto Brother !

Do you plan to let it outside like that without protection from the rain  ?

Offline Tscarborough

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Re: Finally a Swedish neapolitan WFO underway
« Reply #197 on: August 05, 2013, 11:25:49 PM »
What is a couple percent when you are operating at temps around 900 degrees?  Not a construction problem, just an oven management issue.

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #198 on: August 06, 2013, 10:47:14 AM »
Ok thanks for calming me down  ;D
If something was wrong at this stage i would probably get get a nervous breakdown haha. Building looked easy from pictures but as a beginner i have struggled alot.. especially with planning and thinking. But also i have learned so much so it has been worth it.

Offline fagilia

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Re: Finally a Swedish neapolitan WFO underway
« Reply #199 on: August 06, 2013, 10:48:41 AM »
And no sub iam covering it when iam not working on it.


 

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