#1  
Old 10-07-2012, 06:38 PM
Serf
 
Join Date: Aug 2012
Location: East Syracuse, NY
Posts: 15
Default Barrier between first course and floor

In looking at several of the pictures I noticed that many people have what appears to be a cardboard barrier between their first course wall and floor. Is this indeed the case? If so, does it stay in?

Thanks again. I promise to get moving on some pictures now that we are progressing forward from lurker and information collector to builder and baker.

Sincerely,
A little naive and a little green in Syracuse
Reply With Quote
  #2  
Old 10-07-2012, 09:21 PM
Laborer
 
Join Date: Jan 2010
Location: Wallingford, Vermont
Posts: 89
Default Re: Barrier between first course and floor

It's a corrugated cardboard spacer. It's used to leave a gap between the floor and the first course, so the floor won't crack the dome when it expands. You just leave it in place, and it burns out (eventually) during normal firing.
Reply With Quote
  #3  
Old 10-07-2012, 11:51 PM
brickie in oz's Avatar
Il Pizzaiolo
 
Join Date: Mar 2009
Location: Whittlesea
Posts: 3,455
Default Re: Barrier between first course and floor

Quote:
Originally Posted by vtsteve View Post
It's a corrugated cardboard spacer. It's used to leave a gap between the floor and the first course, so the floor won't crack the dome when it expands. You just leave it in place, and it burns out (eventually) during normal firing.
Confused.....
Laying the bricks dry would have the same affect, sans the cardboard.
__________________
The English language was invented by people who couldnt spell.


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 10-08-2012, 09:04 AM
Laborer
 
Join Date: Jan 2010
Location: Wallingford, Vermont
Posts: 89
Default Re: Barrier between first course and floor

The vertical cardboard strip around the fitted floor keeps little bits of mortar and brick from getting into the gap as you build the walls. A couple of members have reported major dome cracks because the gap wasn't maintained (debris got in while they were building the walls, and it pushed the dome apart when the floor expanded). In use, the cardboard burns out and the gap fills with soft ash.

The spacer is needed only if you're building the dome around the floor (the floor bricks are cut to fit inside the dome). If you're laying the dome on the floor, just set first wall course dry on top of the floor (no mortar).
Reply With Quote
  #5  
Old 10-09-2012, 05:01 PM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Barrier between first course and floor

__________________
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 10-09-2012, 06:47 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,842
Default Re: Barrier between first course and floor

Quote:
Originally Posted by Ken524 View Post
Ken, I'm not getting it. I didn't worry about the gap thinking there was plenty of space between all the brick in the hearth (as tight as I tried to place them). I have no issues by not using the "gap". Without going through the thread - did you install one?
__________________
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
  #7  
Old 10-09-2012, 08:07 PM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Barrier between first course and floor

Hi Les,

I posted the "Mind the Gap" picture to be funny... I thought it was good timing .

I used the cardboard to maintain a gap between the floor and wall of my oven. After several years of pondering it, I now believe that planning for a gap probably isn't going to make much, if any, difference. The floor bricks all have small gaps in between them (even if you think they are tight) and the expansion we are talking about is pretty small (microns?). I would be surprised if the diameter of the floor changed enough to damage the oven wall.

Having the gap (which gets filled with ash) certainly doesn't hurt anything.
__________________
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
  #8  
Old 10-09-2012, 08:11 PM
Les's Avatar
Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,842
Default Re: Barrier between first course and floor

Gotcha, I guess being safe does no harm.

Take care,

Les...
__________________
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
  #9  
Old 10-09-2012, 08:13 PM
Tscarborough's Avatar
Il Pizzaiolo
 
Join Date: Oct 2009
Location: Ausitn
Posts: 3,075
Default Re: Barrier between first course and floor

Since the floor is generally cooler than the walls and the wall length is generally greater (well not generally, it is actually 3.14159 times greater) than the diameter of the oven, the expansion of the dome will more than allow for the expansion of the floor.
Reply With Quote
  #10  
Old 10-09-2012, 08:22 PM
Ken524's Avatar
Il Pizzaiolo
 
Join Date: May 2007
Location: Kentucky
Posts: 1,649
Default Re: Barrier between first course and floor

Good answer! Give that man a piece of Pi.

__________________
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
Reply

Tags
barrier, firebrick floor, first course, floor

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



All times are GMT -7. The time now is 07:01 AM.

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