#1  
Old 11-15-2010, 04:23 PM
Serf
 
Join Date: Oct 2010
Location: Alabama
Posts: 8
Default Newbie Mistake, Will I be Ok?

I have been working like crazy for 3 weeks and have come to the dome. After reading some stories about losing heat and other problems I am a little confused and worried.
I poured a 3 1/2 inch slab on the blocks and then 3 1/2 inch slab of the portland/vermiculite mix and added 18 fire brick splits under the dome floor area. Do I still need ceramic board at this point?
Reply With Quote
  #2  
Old 11-16-2010, 10:20 AM
Peasant
 
Join Date: Oct 2010
Location: San Antonio, TX
Posts: 36
Default Re: Newbie Mistake, Will I be Ok?

From everything I have read you can use the FB board to replace the vermiculite, but you don't have to. I have seen in other builds where they used 4.5" or even more on the vermiculite slab. I did a 4" vermiculite with no FB board.
Reply With Quote
  #3  
Old 11-16-2010, 10:48 AM
Tscarborough's Avatar
Il Pizzaiolo
 
Join Date: Oct 2009
Location: Ausitn
Posts: 3,108
Default Re: Newbie Mistake, Will I be Ok?

Normally the floor is made with full fire bricks, but the splits will work, they just won't hold as much heat. You would not put insulation on top of them, then more firebrick on top of that, though.
Reply With Quote
  #4  
Old 11-16-2010, 11:25 AM
Serf
 
Join Date: Oct 2010
Location: Alabama
Posts: 8
Default Re: Newbie Mistake, Will I be Ok?

Thanks for the reply, I came up short on the vermiculite by 10% and so I added the split bricks at the last second to take up some space. I think on page 29 of the FB oven plans it said this would help hold some heat. It was 10:30PM when this happen so going back to the store was not possible.
The portland/vermiculite mix is pushing 1 1/2 to 5 ratio (to make the pour)so I was a little worried when I read some posts about heat loss or not heating at all. I guess I should start working in the AM but being a musician I get my energy high at night time.
The one good thing is that I live around 400 pecan trees and wood is not a problem. Thanks again for the help.
Reply With Quote
  #5  
Old 11-16-2010, 01:04 PM
DrakeRemoray's Avatar
Il Pizzaiolo
 
Join Date: Mar 2006
Location: Littleton, CO
Posts: 1,211
Default Re: Newbie Mistake, Will I be Ok?

So you will have an extra thick floor on top of slightly thin (by 1/2 inch) insulation? It is going to have to be your call, but you really don't need extra mass in the floor. It will just make heat up take longer and really there is plenty of stored heat in the regular design without adding additional mass to the floor. This is somthing you can only fix now, so I would consider pulling up the floor and adding some additional insulating board (and this really mostly to get the floor up to the height you want). 3.5 inches would probably be OK on the insulation, but the extra mass could be a killer IMO.
__________________
My Oven Thread:

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 11-16-2010, 03:57 PM
Neil2's Avatar
Il Pizzaiolo
 
Join Date: Oct 2006
Location: Vancouver Island
Posts: 1,374
Default Re: Newbie Mistake, Will I be Ok?

Or put on another 2 inches of vermicrete.
Reply With Quote
  #7  
Old 11-16-2010, 05:07 PM
Serf
 
Join Date: Oct 2010
Location: Alabama
Posts: 8
Default Re: Newbie Mistake, Will I be Ok?

Sounds like I need to cut out the brick and insert a ceramic board. Glad the dome was not started. A million thanks and if I ever win the lotto you guys are set!!
Reply With Quote
  #8  
Old 11-16-2010, 06:42 PM
DrakeRemoray's Avatar
Il Pizzaiolo
 
Join Date: Mar 2006
Location: Littleton, CO
Posts: 1,211
Default Re: Newbie Mistake, Will I be Ok?

Did you set the splits down in the vermiculite? You may be able to just dig them out and pour another layer...
Also, I cannot view that picture...
__________________
My Oven Thread:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #9  
Old 11-16-2010, 07:03 PM
Serf
 
Join Date: Oct 2010
Location: Alabama
Posts: 8
Default Re: Newbie Mistake, Will I be Ok?

DrakeRemoray, I put the picture in Photo Gallery under Hearth and Stand "David's Mistake". I think that taking out the brick and going with port/verm or ceramic will give me the 3 1/2 that I need. I have some 1200F pipe insulation but its fiberglass type, is this some that might work? Thanks
Reply With Quote
  #10  
Old 11-16-2010, 07:59 PM
Journeyman
 
Join Date: Aug 2010
Location: Glendale, Arizona
Posts: 397
Default Re: Newbie Mistake, Will I be Ok?

Hello P n J,

I looked at your photo. Here's what I would do. Dig out the firebrick splits and pour the void level with 1:5 insulation. If you decide to put down insulation board, then place it so it will fit the oven footprint. Lay the full hearth bricks on top of the board.

Cheers,
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
Can you spot the mistake? Breven Brick Oven Photos 10 01-10-2009 10:40 PM
Can you spot the mistake? Breven Newbie Forum 5 07-14-2008 11:59 AM
Newbie List of Questions TBM66 Getting Started 29 03-10-2008 01:58 AM
Newbie, first question. CSWolffe Introductions 5 06-10-2007 05:24 AM
Is this ridge beam a mistake? Marcel Brick Oven Photos 10 12-17-2005 09:17 AM


All times are GMT -7. The time now is 12:06 PM.

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