#1  
Old 10-06-2011, 12:32 PM
Apprentice
 
Join Date: Jul 2006
Location: Dorset, United Kingdom
Posts: 149
Default Hearth insulation confusion......Help

I have built a cast segmented oven which weighs over half a ton and intend to put it on a trailer. The hearth is 3" thick (as are the oven walls) I have built the frame in my trailer and the top layer so far is going to be marine ply. Now obviously I can't put the oven straight on the plywood (I persume given time it would burn) I was wondering if I made vermiculite cement (6-1) at 1" thick and also put 1" ceramic blanket under the hearth would it protect the plywood base? failing this I have a lot of house insulation (Kingspan here in the UK) It's basically dense foam woth aluminum paper on each side. I was thinking of usint this but I don't know how it will stand so much heat and weight over time... Any ideas or pointers, sorry but insulation board is not an option right now and i need to save as much weight as i can hence the 1" of vermiculite cement. Thank you

My oven so far--- http://www.fornobravo.com/forum/f21/...day-16182.html (My latest precast oven, struck today)
Reply With Quote
  #2  
Old 10-06-2011, 01:25 PM
mrchipster's Avatar
Il Pizzaiolo
 
Join Date: Apr 2010
Location: Minneapolis, MN USA
Posts: 1,214
Default Re: Hearth insulation confusion......Help

The insulation board is not very heavy and the blanket will crush under the weight of the floor.

You will be able to carry much less wood if you insulate the floor well. And that would be a 2 inch layer of insul board.

Just my two cents.

Chip
Reply With Quote
  #3  
Old 10-06-2011, 01:44 PM
dmun's Avatar
Moderator
 
Join Date: Jul 2005
Location: New Jersey USA
Posts: 4,216
Default Re: Hearth insulation confusion......Help

Don't use domestic insulation to insulate your oven. It will burn and stink, as it has organic binders.
__________________
My geodesic oven project:
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
  #4  
Old 10-07-2011, 06:26 AM
Apprentice
 
Join Date: Jul 2006
Location: Dorset, United Kingdom
Posts: 149
Default Re: Hearth insulation confusion......Help

Insulation board is so expensive here in the uk and it seems hard to find.any alternative suggestions.
Reply With Quote
  #5  
Old 10-07-2011, 08:34 AM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,648
Default Re: Hearth insulation confusion......Help

Vermiculite/portland may not hold up with the road vibration. You really, really want to use board. You might email a few US places and see about having it shipped, but local board may be cheaper than that.

Don't skimp on the floor insulation. This is the one area of your oven that you MUST do correctly the first time. Bite the bullet and get a 2-4 inches of board.
__________________
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
  #6  
Old 10-10-2011, 06:11 AM
Peasant
 
Join Date: Dec 2009
Location: Belfast, Co Antrim
Posts: 25
Default Re: Hearth insulation confusion......Help

That looks great, but I am wondering why you made it so big if you want to keep it portable.

I suggest you keep this in your back yard and make another to fit on a trailer... which you would need to be braked double axle to prevent it tipping.

This is the FB insulation board link
http://www.fornobravo.com/PDF/FB_board.pdf
as you see it is 3 to 4 times better than vermiculite so is much lighter and compact.
You can get it for less than 80 quid from a refectory builder's yard. My local one has offcuts which I collect from time to time, no charge/beer money
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
hearth insulation layer Alex uk Forum Guidelines 3 11-12-2010 09:04 AM
How far (laterally) should hearth insulation extend? kebwi Tools, Tips and Techniques 2 09-29-2009 10:22 AM
Smaller Oven - Hearth / Structural Insulation ? mikeyeye Newbie Forum 3 05-07-2009 08:05 AM
Adding Hearth Insulation Xabia Jim Tools, Tips and Techniques 28 02-27-2008 12:33 AM
Hearth insulation with brick? asudavew Getting Started 3 08-24-2007 12:20 PM


All times are GMT -7. The time now is 06:37 AM.

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