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

Like Tree1Likes

Reply
 
LinkBack Thread Tools Display Modes
  #11  
Old 08-25-2012, 09:13 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,831
Default Re: Insulation recommendations

Quote:
Originally Posted by jab49 View Post
Thanks Les - that makes sense. So if my dome has a surface area of say, 2.73 sq m, allow for 3-4 times that in blanket. And allow for the chimney support up to the outer arch, I'm assuming, too.
Cheers

JT
JT - that would be a good amount of insulation. In regard to the chimney and outer arch - probably not required. The heat at that point is wasted so let it go? I insulated my flue because I went with type S mortar for my decorative brick - and the insulation was no more than an inch thick.
__________________
Check out my pictures here:

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


If at first you don't succeed... Skydiving isn't for you.
Reply With Quote
  #12  
Old 08-26-2012, 08:32 AM
Faz Faz is offline
Laborer
 
Join Date: Jul 2007
Location: Kent, UK
Posts: 56
Default Re: Insulation recommendations

I used a 1 inch blanket to insulate the dome, which was in a double layer across most of the oven. This was then covered with approx 4 inches of 9:1 vermicrete. The blanket was held in place with chicken wire, which was tightened up by twisting the mesh with pliers. The insulation only covered the entry where there was an overlap, I did not apply any insulation specifically to insulate the brick work of that area. There is a heat break between my done and the entry to prevent heat loss through that route.

See pics below.

The vermicrete does not compress the blanket to any great extent, as it is very light.





Last edited by Faz; 08-26-2012 at 08:34 AM. Reason: Added some extra information for clarity.
Reply With Quote
  #13  
Old 08-28-2012, 07:32 PM
Apprentice
 
Join Date: Feb 2012
Location: ohio
Posts: 133
Default Re: Insulation recommendations

Hi JT, yes, going same route as you, keeping it an igloo, good to hear you have a friend to help with stucco, never did that before, hope it goes ok. Started 3 curing fire all good so far, have fun with your build. Take care, pat
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #14  
Old 09-08-2012, 12:29 PM
Peasant
 
Join Date: Sep 2011
Location: iowa
Posts: 29
Default Re: Insulation recommendations

Can anyone help me with this, we're in the same situation.

We just finished 3" of blanket on our dome and chicken wire to boot.

I'm wondering a few things:

1. The vermiculite we can get around here is this stuff: Vermiculite Insulation at Menards

it's the flake variety. I'm assuming it's not going to work very well for the dome?

2. How thick do we need to go assuming this is just for covering the blanket not for insulation? I'm planning on 10:1 but we've run out of room on our dome and it's now pretty much flush with the base on the outside. The thinner at this point the better just because we have no where to go!

3. In relationship to the previous question, any idea how much portland and vermiculite we'll need for what is now about a 50" diameter?
Reply With Quote
  #15  
Old 09-09-2012, 12:51 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,699
Default Re: Insulation recommendations

1. Don't know what the stuff is like without seeing it, but I find 50/50 vermiculite, perlite works better than either of them alone so you could get some perlite from nursery supplies and mix it. Expect around 25% loss in volume on mixing.
2. If you only need it to get the shape nice and even you can probably get away with making it only about an inch thick but then make the brew a bit richer (say 7:1) if you tap it with the face of a trowel you can get the form remarkably even.
3. Calculate the volume required 4/3 x 3.142 x radius cubed (divide by two because it's a hemisphere) and remember you'll lose some volume on mixing.
Reply With Quote
  #16  
Old 09-09-2012, 06:46 AM
Apprentice
 
Join Date: Feb 2012
Location: ohio
Posts: 133
Default Re: Insulation recommendations

I ended up using almost 2 bags on my 42" covering 2-3 " on sides, and 4-5" on top, with 10-1 mix. good luck!
__________________

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Questionable dome insulation installation indiebands Getting Started 2 08-14-2012 03:25 AM
Insulation vs. Wall thickness das Pompeii Oven Construction 4 05-30-2012 03:22 AM
Securing & Shaping Wire Mesh Over Insulation WaWaZat Getting Started 9 10-30-2009 04:50 PM
Blanket Insulation altamont Pompeii Oven Construction 12 10-01-2009 08:09 AM
How far (laterally) should hearth insulation extend? kebwi Tools, Tips and Techniques 2 09-29-2009 10:22 AM


All times are GMT -7. The time now is 08:42 AM.

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