Go Back   Forno Bravo Forum: The Wood-Fired Oven Community > Pizza Oven Design and Installation > Other Oven Types

Like Tree1Likes

Reply
 
LinkBack Thread Tools Display Modes
  #11  
Old 12-14-2012, 09:32 AM
Peasant
 
Join Date: Nov 2012
Location: Arizona
Posts: 33
Default Re: My first WFO build...

Building the clay dome:






Reply With Quote
  #12  
Old 12-14-2012, 09:34 AM
Peasant
 
Join Date: Nov 2012
Location: Arizona
Posts: 33
Default Re: My first WFO build...









If nothing else, at least I get to take a break for a while, which my back will greatly appreciate. Now all there is to do is wait...wait for it to dry, empty the sand, and fire it a little at a time to cure it. Then insulation and finishing plaster. Hopefully I'll have good news and more photos in a couple of weeks. Thanks for looking!
Reply With Quote
  #13  
Old 12-14-2012, 10:24 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,824
Default Re: My first WFO build...

Because the clay will shrink, you need to remove the sand ASAP or the dome will crack because it has no room to move. It will take a long time to dry.Normally pottery needs a week to dry before firing, your walls are many times thicker, so will need way longer.Did you use any straw or sand in the mix?
Reply With Quote
  #14  
Old 12-14-2012, 12:10 PM
Peasant
 
Join Date: Nov 2012
Location: Arizona
Posts: 33
Default Re: My first WFO build...

I was hoping to let it dry for a few days just to ensure it will hold its shape before removing the sand and letting it dry completely...is that still going to cause me problems? I expect some cracks, I'm just hoping to avoid it splitting in half. Of course, it rains like 3 times a year here and it just has to be cloudy and raining since I finished the dome! Two good sunny days in a row and I imagine I could clear the sand out.

The mixture is actually more sand than clay, although it looks like it's mostly clay. It's Muddox fire clay mixed with 3 parts sand (fine, medium, and coarse). I did not use any straw with this attempt.
Reply With Quote
  #15  
Old 12-14-2012, 03:48 PM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,824
Default Re: My first WFO build...

The sand in the mix will reduce the shrinkage, but it will also reduce the drying rate. As soon as it begins to dry and the surface feels firm it will be shrinking. It won't collapse because of its form. Get the sand out ASAP. If it were mine I'd be leaving it three weeks before thinking about any fires.
Reply With Quote
  #16  
Old 12-15-2012, 04:27 AM
cobblerdave's Avatar
Il Pizzaiolo
 
Join Date: Jan 2010
Location: brisbane australia
Posts: 2,433
Question Re: My first WFO build...

Gudday
Beg to differ David but from what I have read (and no I have had no personial experience with mud ovens). After removing the mold sand small fires of straw and thin twigs are used to dry the oven out from the inside out. From what I understand its a drying process rather than actually firering the clay. I can't give a link to help but I believe this warrants further investigation

Regards dave
__________________
Measure twice
Cut once
Fit in position with largest hammer

My Build

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My Door

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #17  
Old 12-15-2012, 05:01 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,824
Default Re: My first WFO build...

If you are lighting fires in the oven, you are firing the clay. But you need to get it to 573 C to make the clay permanent (won't return to mud if made wet) Apart from the surface at the apex of the dome a WFO is unlikely to get that hot. The drying fires are only driving the water out, but as the flame is difficult to control it is probably prudent to allow wind and sun to do most of the work safely for you. Water in thick pots or sculptural clay work has a tendency to explode (blowing) at around 250 C it may look dry but water suddenly turning to steam in the centre splits the wall neatly in half. Exactly the same thing can happen to a cob oven if there is substantial water sitting in the middle of the wall.

Last edited by david s; 12-15-2012 at 05:25 AM.
Reply With Quote
  #18  
Old 12-15-2012, 02:41 PM
cobblerdave's Avatar
Il Pizzaiolo
 
Join Date: Jan 2010
Location: brisbane australia
Posts: 2,433
Default Re: My first WFO build...

Gudday David
I suppose this practice like others ....crushed glass as insulation etc should be viewd as "folk law "rather than best practice

Regards dave
__________________
Measure twice
Cut once
Fit in position with largest hammer

My Build

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

My Door

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #19  
Old 12-15-2012, 03:01 PM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,824
Default Re: My first WFO build...

Quote:
Originally Posted by cobblerdave View Post
Gudday David
I suppose this practice like others ....crushed glass as insulation etc should be viewd as "folk law "rather than best practice

Regards dave
Yes, I agree with you, ultimately, whatever works, works. There are many ways to get to the end point of having a workable oven and this is what makes it such a fascinating obsession.
Reply With Quote
  #20  
Old 03-23-2014, 05:22 PM
Peasant
 
Join Date: Nov 2012
Location: Arizona
Posts: 33
Default Re: My first WFO build...

Hi All! I imagine nobody noticed that I fell of the face of the Earth for over a year,
but for those of you that were following my thread, I apologize.
I've had some serious back issues that have had me down for the count for all this time,
but things are getting better. I did get the sand cleared out of the dome,
got it dried/cured, built a few fires in it, and even made some pies to test it out.
Here's picking up where I left off but never posted:








Last edited by Mooveebuff; 03-23-2014 at 05:42 PM. Reason: Needed to resize the photos.
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
Oven Build In Central Alabama MetalHead Pompeii Oven Construction 80 08-06-2012 06:04 PM
Pensacola Build rodeair Pompeii Oven Construction 58 03-18-2012 08:52 PM
Refractory Cast Build Booma Other Oven Types 15 02-13-2012 05:23 PM
Debating between Pompeii and Modular build Cheesesteak Pompeii Oven Construction 20 04-02-2011 05:17 PM
Bocce Court Build tifosi General Building and Construction 12 06-07-2010 03:46 AM


All times are GMT -7. The time now is 05:50 PM.

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