#1  
Old 03-15-2009, 08:30 PM
Peasant
 
Join Date: Feb 2009
Location: mississauga
Posts: 48
Smile VERMICULITE in the foundation?

HI, my name is Joe and I am about to start my pizza oven build. I live in Canada, Mississauga to be exact just outside of Toronto. Frost is a big concern here because of our winters and I really don't want to dig four feet if I don't have to. I'd like to dig 16" trenches around the perimeter along with 6 to 8 - 8" sono tubes about 4' down. I'm putting down gravel, 6mil poly and mybe some 2" foam. My question is this has anyone ever put a 3 to 4" layer of the vermiculite and cement mixture before the 5.5" foundation slab? Your thouhts would be appreciated. This site is amazing and has already answered a 100 questions that I didn't have to ask.
Reply With Quote
  #2  
Old 03-30-2009, 11:55 AM
Apprentice
 
Join Date: Jul 2008
Location: Norway
Posts: 120
Default Re: VERMICULITE in the foundation?

Hello Joe,
Based on what I saw and experienced when I used a cement/perlite mix as part of the insulation under my oven I will not recommend to use this under the foundation slab. Even though the pressure may not be much higher than under the oven itself i really do not think that the structure of the cement/perlite(vermicullite) will survive the continues freeze and taw (thaw?) and other erosion mechanisms in the ground (water etc). The standard way of making a ground slab foundation "frost-free" over here is to make sure you have some 40 cm of gravel, then 7,5-10 cm of styrofoam insulation (specified for high pressure) which extends some 50 cm outside the foundation perimeter. Some put the styrofoam insulation in the bottom (takes some more digging due to the extension). And on top of that the reinforced foundation slab.

karl
Reply With Quote
  #3  
Old 04-01-2009, 06:57 PM
Peasant
 
Join Date: Feb 2009
Location: mississauga
Posts: 48
Default Re: VERMICULITE in the foundation?

Thanks, Karl thats basicly what I have done accept I did dig 9 8" sono tubes 4' down and then tied everything with rebar. I have pictures but I havn't figured-out how to post them YET, I'm working on that, and will post them soon. Thanks, Joe
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
Starting my foundation questions? Italfranco1 Pompeii Oven Construction 17 07-15-2012 05:16 PM
What is Vermiculite james Getting Started 8 07-09-2008 11:35 AM
Another foundation question mfiore Getting Started 27 06-01-2008 05:31 PM
Vermiculite / best Foundation Mix ross Getting Started 3 08-29-2007 11:03 AM
Bedding brick hearth to vermiculite insulation nissanneill Getting Started 5 05-22-2007 07:41 PM


All times are GMT -7. The time now is 09:22 PM.

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