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

Like Tree12Likes

Reply
 
LinkBack Thread Tools Display Modes
  #91  
Old 02-20-2013, 02:54 AM
Master Builder
 
Join Date: Jan 2013
Location: Tochigi Prefecture, Japan
Posts: 620
Default Re: Structural Slab for new WFO

Hello again Lawrence,

Like I said, I have a lot of work to finish.. Probably the only work done outside will be "initial firing for drying and curing" then back indoors for everything else. The base will be done after the frost leaves the ground. Why fight the weather when there is a forklift less than 1 km away that I can use just by calling!

Have a full sized gas oven at the house right now--why rush?
Just doesn't get to the temperatures of wood! Haven't tasted pizza baked in a WFO or as a matter of fact---anything else either! So, I cannot miss what I haven't tasted!

No objections from this camp!
What did you think I was objecting to?
Reply With Quote
  #92  
Old 02-26-2013, 06:14 PM
Master Builder
 
Join Date: Jan 2013
Location: Tochigi Prefecture, Japan
Posts: 620
Default Re: Structural Slab for new WFO

Two pieces of good news today!

1) Took the plastic off the "Oya stone" outer landing area and it looks fine, tapped on it lightly with no echo sound to it. The stone still has a damp appearance to it.. Think that is good--to allow the cement in the thinset to set up slowly. (Just covered it back up with plastic--don't see any reason for a rushed dry here!)

2) The thin render coat over the pericrete has begun to show some hairline cracks. To me that is an indication that the layer below of insulation is finally drying out. The entire render area, structural slab, and exposed areas of pericrete all have the same "light gray" color of dry concrete. I am sure there is still plenty of water deep inside the insulation--but not in the quantities originally.

Question for other forum members: For those who have left a permanent vent in their rendered dome, what did you use? What size did you make it? And why?
Reply With Quote
  #93  
Old 02-26-2013, 06:44 PM
Gulf's Avatar
Il Pizzaiolo
 
Join Date: Sep 2011
Location: Mississippi
Posts: 1,567
Default Re: Structural Slab for new WFO

Question for other forum members: For those who have left a permanent vent in their rendered dome, what did you use? What size did you make it? And why?
I left a 2" ish opening in the top of my dome because that is the size of a beer can . Since curing I have reduced that to 1" for a breather.
__________________

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
  #94  
Old 02-26-2013, 07:23 PM
stonecutter's Avatar
Il Pizzaiolo
 
Join Date: Jun 2007
Location: South Carolina,USA
Posts: 1,848
Default Re: Structural Slab for new WFO

Quote:
Originally Posted by mikku View Post
Two pieces of good news today!

1) Took the plastic off the "Oya stone" outer landing area and it looks fine, tapped on it lightly with no echo sound to it. The stone still has a damp appearance to it.. Think that is good--to allow the cement in the thinset to set up slowly. (Just covered it back up with plastic--don't see any reason for a rushed dry here!)

2) The thin render coat over the pericrete has begun to show some hairline cracks. To me that is an indication that the layer below of insulation is finally drying out. The entire render area, structural slab, and exposed areas of pericrete all have the same "light gray" color of dry concrete. I am sure there is still plenty of water deep inside the insulation--but not in the quantities originally.
1) Yes, that is a good sign...and a slow cure is best.

2) Hair cracking in the skim coat is due to the drying process and the material shrinking.
__________________

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


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


When we build, let us think that we build for ever.
John Ruskin
Reply With Quote
  #95  
Old 02-26-2013, 08:23 PM
Master Builder
 
Join Date: Jan 2013
Location: Tochigi Prefecture, Japan
Posts: 620
Default Re: Structural Slab for new WFO

Quote:
Originally Posted by Gulf View Post
Question for other forum members: For those who have left a permanent vent in their rendered dome, what did you use? What size did you make it? And why?
I left a 2" ish opening in the top of my dome because that is the size of a beer can . Since curing I have reduced that to 1" for a breather.
Thanks Gulf!
I understand this is your breather, but what is it? A special item or something you found that meets your needs?
Reply With Quote
  #96  
Old 02-26-2013, 08:25 PM
Master Builder
 
Join Date: Jan 2013
Location: Tochigi Prefecture, Japan
Posts: 620
Default Re: Structural Slab for new WFO

Quote:
Originally Posted by stonecutter View Post
1) Yes, that is a good sign...and a slow cure is best.

2) Hair cracking in the skim coat is due to the drying process and the material shrinking.
That is indeed good news! Thank you for reinforcing my suspicions and pointing me in the right direction!
Reply With Quote
  #97  
Old 02-26-2013, 10:25 PM
brickie in oz's Avatar
Il Pizzaiolo
 
Join Date: Mar 2009
Location: Whittlesea
Posts: 3,455
Default Re: Structural Slab for new WFO

Quote:
Originally Posted by Gulf View Post
Since curing I have reduced that to 1" for a breather.
All you need now is the dipstick.....
__________________
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
  #98  
Old 02-27-2013, 12:19 AM
Master Builder
 
Join Date: Jan 2013
Location: Tochigi Prefecture, Japan
Posts: 620
Default Re: Structural Slab for new WFO

Quote:
Originally Posted by brickie in oz View Post
All you need now is the dipstick.....
If I remember correctly on your own build, you did not have a full render or pericrete insulation layer so you have no issue with the possibility of built-up steam in these areas.

If you did, however, how would you provide for this moisture to escape? Since every build has entry points for water--even those with full roof enclosures.
Reply With Quote
  #99  
Old 02-27-2013, 12:31 AM
brickie in oz's Avatar
Il Pizzaiolo
 
Join Date: Mar 2009
Location: Whittlesea
Posts: 3,455
Default Re: Structural Slab for new WFO

Quote:
Originally Posted by mikku View Post
even those with full roof enclosures.
The only way for moisture to get into my oven is via the moisture in the air, for 90% of the time the air here is relatively dry so I have no issue.

The ambient moisture content of Victorian air (where I live in Au ) is 12%, so its no big issue.

I know its 12% because some time ago I did a lot of hobby furniture making, one issue with furniture is the moisture content of the timber being used.
__________________
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
  #100  
Old 02-27-2013, 12:53 AM
Master Builder
 
Join Date: Jan 2013
Location: Tochigi Prefecture, Japan
Posts: 620
Default Re: Structural Slab for new WFO

[QUOTE=brickie in oz;146554]The only way for moisture to get into my oven is via the moisture in the air

I was referring to your style of build: w/o render or pericrete insulation where steam buildup would not be an issue. Your design would work well in probably all locations. But in more damp locations, wind driven rain blown during heavy storms would still go down the chimney and soak a lot of the masonry. Still no steam issue...except if you attempted a roaring fire without some drying first.

But for me and a lot of other people with dome enclosures with full render and pericrete insulation, how would you advise us to cope with the problem of possible steam damage? This is something that I am try to anticipate in the build phase rather than try to correct later!
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
Started in Napa, WFO dome & slab questions EricU Getting Started 9 08-01-2010 12:08 PM
Foundation Slab Questions achilles007 Newbie Forum 5 07-06-2009 04:52 PM
structural slab question rbigante Pompeii Oven Construction 2 10-01-2008 07:44 PM
structural slab question rbigante Pompeii Oven Construction 5 09-29-2008 10:42 AM
New hearth slab design question DrakeRemoray Pompeii Oven Construction 6 04-24-2006 01:42 PM


All times are GMT -7. The time now is 09:36 AM.

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