Go Back   Forno Bravo Forum: The Wood-Fired Oven Community > Pizza Oven Design and Installation > Getting Started

Like Tree4Likes

Reply
 
LinkBack Thread Tools Display Modes
  #141  
Old 09-10-2012, 11:16 AM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Insulation Efficiency

Quote:
Originally Posted by BobGer View Post
on top of firebrick, which I was going to cover with high temp mortar
You really don't need this. If you built a Pompeii, there is plenty of thermal mass in the bricks. No need to add more... unless you really want to. Some add it for structural integrity.

Quote:
I was going to then cover with aluminum foil
You REALLY don't want/need aluminum foil. It does absolutely nothing and will eventually corrode away.

Quote:
then the FB blanket (3 inches),
Yes!

Quote:
then a layer or two of vermiculite concrete
I did this as well. I think it's worth while. Can't have too much insulation.

And as Steve stated, you want the most efficient insulation (fire blanket) closest to the heat.
__________________
Ken H. - Kentucky
42" Pompeii


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Updated!


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
...
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
...
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #142  
Old 09-10-2012, 04:21 PM
Serf
 
Join Date: Sep 2012
Location: baldwinsville, ny
Posts: 3
Default Re: Insulation Efficiency

Appreciate the quick response and advice from both VTSteve and Ken524. It never was clear why some designs called for the aluminum foil. One less step!
Reply With Quote
  #143  
Old 09-11-2012, 07:39 AM
Apprentice
 
Join Date: Jan 2010
Location: Houston
Posts: 192
Default Re: Insulation Efficiency

I agree you want the insulation first. You want to heat up the oven not the concrete mass.
Reply With Quote
  #144  
Old 12-25-2012, 05:15 AM
Serf
 
Join Date: Dec 2012
Location: Vietnam
Posts: 13
Default Re: Insulation Efficiency

Hi there, im building a oven in vietnam and we not have any fancy blankets and stuff like this around hee since there is no use for keeping things warm,... Its warm here all day haha.
But i was thinking of putting a 3 inch layer of burned rice husk ash on top of the dome and then cover it with a 2 inch layer of concrete mixed up with the same stuff.
Whats yr idea about this? An other option was braking a whole lot of glass up and stuff that between the inner and outer wall of the dome?
Thaks for yr toughts.
Hendrik
Reply With Quote
  #145  
Old 12-27-2012, 07:55 PM
Serf
 
Join Date: Sep 2012
Location: baldwinsville, ny
Posts: 3
Default Re: Insulation Efficiency

Have no idea what burned rice husk ash would do; glass would seem to offer zero insulation. You can order the high temperature insulation blanket - look on the internet for sources including forno-bravo. Most, if not all of it is manufactured in China anyway. And not sure why pearlite or vermiculite isn't also available worldwide. Regardless, I wouldn't sacrifice insulation which is the key to the whole idea of an outdoor oven. Good luck.
Reply With Quote
  #146  
Old 01-20-2013, 09:00 AM
dimitrisbizakis's Avatar
Apprentice
 
Join Date: Dec 2012
Location: Greece
Posts: 132
Default Re: Insulation Efficiency

Hi everyone, instead of 1" FB blanket and 4" loose perlite can i use 3" of FB blanket only?
Reply With Quote
  #147  
Old 01-20-2013, 09:37 AM
Apprentice
 
Join Date: Jul 2009
Location: Cochrane, Alberta
Posts: 104
Default Re: Insulation Efficiency

Some advantages of the loose perlite is that it was cheap and would uniformly cover the oven. FB Blanket has come down in cost, it is used extensivly for industrial use and is an excellent insulation. If you are able to insure that the dome is fully wrapped with the blanket, it will hold the heat in really well. I built my oven out of fire brick and used vermiculite and perlite, but I believe the premanufactured ovens that Forno Bravo are selling, now only come with FB Blanket insulation. You will be fine with 3" of FB Blanket.
Reply With Quote
  #148  
Old 01-20-2013, 10:39 AM
dimitrisbizakis's Avatar
Apprentice
 
Join Date: Dec 2012
Location: Greece
Posts: 132
Default Re: Insulation Efficiency

Quote:
Originally Posted by Spunkoid View Post
Some advantages of the loose perlite is that it was cheap and would uniformly cover the oven. FB Blanket has come down in cost, it is used extensivly for industrial use and is an excellent insulation. If you are able to insure that the dome is fully wrapped with the blanket, it will hold the heat in really well. I built my oven out of fire brick and used vermiculite and perlite, but I believe the premanufactured ovens that Forno Bravo are selling, now only come with FB Blanket insulation. You will be fine with 3" of FB Blanket.
I don't know why but now an 100 lt perlite costs 8 euros, i will need about 10 so 80 euros.
I have found an 610X9000 mm 25 mm Ceramic blanket for 30 euro, i think that it will cover the dome (90 cm diameter and 45 cm height) for once.
I'm thinking to buy 2 rolls and make a 2 layer insulation.
The only thing i'm troubled with is the final closer but i think i will go for a house.
How can i calculate the exact m3 of perlite i will need for a loose 10 cm?

Last edited by dimitrisbizakis; 01-20-2013 at 10:42 AM.
Reply With Quote
  #149  
Old 01-21-2013, 08:17 AM
Laurentius's Avatar
Master Builder
 
Join Date: Nov 2010
Location: Japan
Posts: 855
Default Re: Insulation Efficiency

If you use a double blanket of ceramic fiber, you would need less perlite to fill the housing, don't you think.
Reply With Quote
  #150  
Old 01-21-2013, 08:24 AM
dimitrisbizakis's Avatar
Apprentice
 
Join Date: Dec 2012
Location: Greece
Posts: 132
Default Re: Insulation Efficiency

Quote:
Originally Posted by Laurentius View Post
If you use a double blanket of ceramic fiber, you would need less perlite to fill the housing, don't you think.
I won't fill the housing at all, just a total of 5'' of ceramic blanket, it this ok?
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 11:27 PM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC