#1  
Old 07-26-2010, 08:26 PM
Derkp's Avatar
Apprentice
 
Join Date: Apr 2010
Location: Utah
Posts: 188
Default Fatal insulation error---I Fear.

My dome/vault area is made of 4 1/2 inch firebrick, back wall also 4 1/2 inch, floor 4 1/2 inch. I applied about 3/4 inch of mortar over the vault to lock it all together.

My concern is that I have just finished my house enclosure, 2 X 4 walls, and there is only about 4 inches between the outer oven surface and the closest 2X4 edge. I plan on filling the total area, wall cavity and 4 inch space with perlite.

I have a thermocouple on the top, back wall, and under the floor. I am going to get a hot fire going before I do the roof and see what happens.

Will the 2X4s burn?
Reply With Quote
  #2  
Old 07-26-2010, 09:01 PM
Peasant
 
Join Date: Sep 2009
Location: Los Angeles
Posts: 33
Default Re: Fatal insulation error---I Fear.

I have 2" of cerra-blanket over my dome and the hottest it's ever gotten on the outside is 100-degrees-F; but then my dome is not enclosed. You might want to consider metal studs for the roof -- I know of one oven who's wood roof burned off, now it's got a steel one. Good luck!
Reply With Quote
  #3  
Old 07-26-2010, 09:30 PM
Derkp's Avatar
Apprentice
 
Join Date: Apr 2010
Location: Utah
Posts: 188
Default Re: Fatal insulation error---I Fear.

The closest the 2X4 roof will get to the oven roof is 6 inches up to about 12 inches away.

Tomorrow will be the big burn and we will see hot hot it gets.

Thanks
Reply With Quote
  #4  
Old 07-27-2010, 04:57 AM
Tscarborough's Avatar
Il Pizzaiolo
 
Join Date: Oct 2009
Location: Ausitn
Posts: 3,086
Default Re: Fatal insulation error---I Fear.

The ignition temperature of wood is pretty high (500F+), I do not think you will have a problem. As an example, fireplace clearances are usually 4" on the sides, and that is for exposed flame.
Reply With Quote
  #5  
Old 07-27-2010, 07:09 AM
Derkp's Avatar
Apprentice
 
Join Date: Apr 2010
Location: Utah
Posts: 188
Default Re: Fatal insulation error---I Fear.

Thanks Tom,

I was hoping that I would not have to track down some insulating blanket or something. There will be quite a bit of perlite on the sides and top. I remember seeing your photo and the big amount that you needed. The space does not look that big until you start to fill it.

Thanks
Reply With Quote
  #6  
Old 07-30-2010, 03:16 AM
Il Pizzaiolo
 
Join Date: Nov 2006
Location: San Antonio
Posts: 1,719
Default Re: Fatal insulation error---I Fear.

I would suggest using steel 2x4s. And sheathing it with hardiplank or equivalent. That way you have no concerns. (NOTE: I don't think it is likely to be a problem but...
Jay
Reply With Quote
  #7  
Old 07-30-2010, 09:37 AM
Derkp's Avatar
Apprentice
 
Join Date: Apr 2010
Location: Utah
Posts: 188
Default Re: Fatal insulation error---I Fear.

I have a piece of hardibacker left over from a tile job and I think that I will put pieces of it in between the 2X4 edge and layers of perlite. I found perlite for $8.60 per 4 cu/ft so I am going to lay it on heavy.
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
Insulation problem Matt916 Pompeii Oven Construction 4 04-29-2010 10:07 PM
dome insulation cecilB Pompeii Oven Construction 1 01-24-2010 03:02 PM
Securing & Shaping Wire Mesh Over Insulation WaWaZat Getting Started 9 10-30-2009 04:50 PM
Blanket Insulation altamont Pompeii Oven Construction 12 10-01-2009 08:09 AM
How far (laterally) should hearth insulation extend? kebwi Tools, Tips and Techniques 2 09-29-2009 10:22 AM


All times are GMT -7. The time now is 08:00 AM.

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