Go Back   Forno Bravo Forum: The Wood-Fired Oven Community > Regional Forums > Australia

Like Tree1Likes

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-18-2014, 01:09 AM
Serf
 
Join Date: Jun 2014
Location: Porepunkah Australia
Posts: 6
Default Cracks

I started building small fires in the oven , starting at 50c then increasing each day by 50c , today at one time it reached 200c then around 160c ,( 4th fire), I have noticed a couple of cracks in the dome , one a long one, I still have the blanket to wrap around dome and final render and paint,
my question is are cracks normal..

Greg
Reply With Quote
  #2  
Old 07-18-2014, 02:54 AM
Il Pizzaiolo
 
Join Date: Jan 2012
Location: Australia
Posts: 1,037
Default Re: Cracks

HI Greg

Would need more information from you eg.
Do you have any straight line joins i.e. where you didn't maintain the brick bond like you see when houses are built.

Also you are curing your oven without blanket which allows the oven to heat at varying temperatures possibly causing it to crack.

You haven't mentioned if there is a vermicrete layer, I'm guessing there isn't.

Some pictures would assist all the experts on here to offer up their comments.

Cracks are normal stated on this site a lot.... So expect them.

I have no cracks at all but took a bloody long time putting my oven together, I took time to ensure I remained on bond, applied my shiralite layer over the dome to lock it in place and also applied my blanket over this b4 cranking it up.

This was done so that the oven heated up evenly and I took my time increasing the temperature, I didn't just cure the oven I also tempered my oven by applying varying heatup temperatures and time short and long fast and slow and steady fires at varying temps.

This was done over a month over this time I had the oven going for a week straight then let it completely go cold then fired it hard then dropped it back. this is how I tempered the oven.

Worse that happened was, was what little mortar was visible inside the oven fell out, because my bond was brick to brick, from front to back bricks needed very little mortar, but I expected this to occur.
__________________
Cheers Colin


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #3  
Old 07-18-2014, 02:56 AM
Il Pizzaiolo
 
Join Date: Jan 2012
Location: Australia
Posts: 1,037
Default Re: Cracks

also I love Porepunkah and Bright my favouriite destination in Victoria. A magical place and visited there every years for years.
__________________
Cheers Colin


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 07-18-2014, 11:53 PM
Apprentice
 
Join Date: Apr 2012
Location: GREENHILL SOUTH AUSTRALIA
Posts: 111
Default Re: Cracks

I would suggest putting the blanket and vermiculite layer on which will assist the cure.

Craig
oasiscdm likes this.
__________________
"All I ask is the chance to prove that money can't make me happy"

Spike Milligan

"It is only impossible if you stop and think about it"
The Pirate Captain
Reply With Quote
  #5  
Old 07-19-2014, 05:43 AM
Serf
 
Join Date: Jun 2014
Location: Porepunkah Australia
Posts: 6
Default Re: Cracks

Thanks for the reply's , I had the idea that I should start with small fires without blanket and final render , as they would trap moisture in , I must be wrong , should I have some sort or hole?vent in the top coat and blanket to let moisture escape.
We have lots of cold weather and damp days this time of year, 2 degrees out side at the moment.
Thanks again.

Greg
Reply With Quote
  #6  
Old 07-19-2014, 05:52 AM
Il Pizzaiolo
 
Join Date: Jan 2012
Location: Australia
Posts: 1,037
Default Re: Cracks

Don't put render coat on before you cure
__________________
Cheers Colin


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

Last edited by oasiscdm; 07-19-2014 at 08:23 PM.
Reply With Quote
  #7  
Old 07-19-2014, 06:04 AM
Serf
 
Join Date: Jun 2014
Location: Porepunkah Australia
Posts: 6
Default Re: Cracks

sorry but what do you mean

Don't put tender cost on before you cure
Reply With Quote
  #8  
Old 07-19-2014, 07:22 PM
Serf
 
Join Date: Jun 2014
Location: Porepunkah Australia
Posts: 6
Default Re: Cracks

so should continue with a few more small fire running all day then blanket and final render.

Greg
Reply With Quote
  #9  
Old 07-19-2014, 08:32 PM
Il Pizzaiolo
 
Join Date: Jan 2012
Location: Australia
Posts: 1,037
Default Re: Cracks

Quote:
Originally Posted by gt7761 View Post
sorry but what do you mean

Don't put tender cost on before you cure

Yes David was correct typed it on my phone. But I fixed the post to correct spelling.

Personally [and everyone has a different view] you have not mentioned a vermiculate cement insulation layer at all. Is your intention to simply wrap with blanket then your render top coat.?

If so how many layers of blanket will you use. If you intend using a vermiculate layer it is going to saturate the blanket and you will need to rid the oven of that moisture. I would wrap it up and continue the cure.

Unless I am missing something, I think we need more information.....
__________________
Cheers Colin


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Reply With Quote
  #10  
Old 07-19-2014, 09:23 PM
Serf
 
Join Date: Jun 2014
Location: Porepunkah Australia
Posts: 6
Default Re: Cracks

Thanks Colin,
I have a blanket , two layers or maybe a bit more and render to do, I wasn't going to do vermiculate cement ,I have followed advice from refactory brick supplier , used there bricks,cement and fireclay.
I will try and post some photos later.

Greg
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
Long Cracks vernod Firing Your Oven 2 04-21-2012 11:43 AM
Question about cracks cholme Firing Your Oven 18 08-06-2011 12:35 AM
When are cracks acceptable? Microheli Newbie Forum 11 07-25-2011 03:26 AM
New Fire Bricks with Cracks staestc Getting Started 8 11-03-2008 05:37 AM
Small cracks in vent Yahoo-Archive Design Styles, Chimneys and Finish 0 03-19-2005 09:38 AM


All times are GMT -7. The time now is 06:13 AM.

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