#1  
Old 10-05-2011, 07:31 PM
Serf
 
Join Date: Jul 2011
Location: Kingstree, SC
Posts: 10
Default Vermiculite Compressive Strength

Does anyone know if the hearth four inch vermiculite-cement insulation layer is stable enough to support a six foot brick flue? Vermiculite seems to be too soft and is causing concern. If any of you have or know of any ovens with longer flues, please advise.
Reply With Quote
  #2  
Old 10-06-2011, 05:52 AM
Faith In Virginia's Avatar
Master Builder
 
Join Date: Oct 2010
Location: Virginia
Posts: 720
Default Re: Vermiculite Compressive Strength

Yes it is stable. My oven has over 7 inches of thermal mass for the floor and dome. So it's almost twice in weight of a standard oven and my vermiculite has not settled at all. You are good to go.

I though the same thing when I built mine. I made a test piece and was truly surprised how strong it is.
Reply With Quote
  #3  
Old 10-06-2011, 12:18 PM
Apprentice
 
Join Date: Jul 2006
Location: Dorset, United Kingdom
Posts: 149
Default Re: Vermiculite Compressive Strength

How about a half ton oven sat on 1" of vermiculite?
Reply With Quote
  #4  
Old 10-06-2011, 01:28 PM
mrchipster's Avatar
Il Pizzaiolo
 
Join Date: Apr 2010
Location: Minneapolis, MN USA
Posts: 1,259
Default Re: Vermiculite Compressive Strength

Quote:
Originally Posted by sonomacast View Post
How about a half ton oven sat on 1" of vermiculite?
You may need to put some sort of support ring around the outside of the vermcrete to contain and protect the outer edge.

Chip
Reply With Quote
  #5  
Old 10-06-2011, 02:16 PM
Apprentice
 
Join Date: Oct 2010
Location: Pensacola, Florida
Posts: 112
Default Re: Vermiculite Compressive Strength

I built my oven on a 4.5 inch layer of 5:1 vermicrete. As I was mortaring the oven, I used the excess mortar on the outer edges. I finally mixed a big batch and finished covering the ends of the vermicrete layer, worked fine.
Leigh
Reply With Quote
  #6  
Old 10-06-2011, 07:56 PM
Serf
 
Join Date: Jul 2011
Location: Kingstree, SC
Posts: 10
Default Re: Vermiculite Compressive Strength

Thanks for the comments. I feel better about the vermicrete supporting the heavier than usual flue.
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
Vermiculite insulation jmkvet Pompeii Oven Construction 5 08-31-2010 04:03 PM
vermiculite hearth question jeffscogson Newbie Forum 14 04-28-2010 01:26 AM
vermiculite mrgweeto Tools, Tips and Techniques 2 07-02-2009 11:52 AM
What is Vermiculite james Getting Started 8 07-09-2008 10:35 AM
Vermiculite - help! Frances Getting Started 7 09-19-2007 04:09 AM


All times are GMT -7. The time now is 07:24 PM.

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