Forno Bravo Forum: The Wood-Fired Oven Community

Forno Bravo Forum: The Wood-Fired Oven Community (
-   Finding Building Materials (
-   -   Ceramic Blanket (

Spinal 08-27-2012 01:55 PM

Ceramic Blanket
A query...

Can someone explain the finer points of ceramic blankets?


1- What's the difference between ceramic blanket and body soluble blanket?

2- What does the density change on a ceramic blanket? I.e. 68kg, 128kg, etc... (other than weight obviously?)

3- For a 42" oven, how much blanket does one normally use?


david s 08-27-2012 07:04 PM

Re: Ceramic Blanket
1. Normal blanket (cheaper) is a class2 carcinogen ie it has produced cancers in rats but yet to record any in humans. Soluble blanket(expensive) has safe fibers as the are soluble when they sit in your lungs. How it stands up to moisture when curing is anyone's guess. Vermiculite and perlite are safer.
2. The heavier (denser) blanket is a slightly better insulator, but not worth the extra expense IMO
3. Calculate the outside surface area of your dome and add around 20%

Spinal 08-27-2012 11:52 PM

Re: Ceramic Blanket

Regarding the carcinogen - I've seen that on the board as well. My understanding is that this in only when cutting it; hence once embedded in an oven enclosure it shouldn't be an issue, right?

I've found some body soluble blanket at roughly the cost of ceramic blanket (did I mention that prices in the UK are high?) so may go with the BS blanket... just worried it'll melt before I manage to put an enclosure on!


Ken524 08-28-2012 08:29 PM

Re: Ceramic Blanket
The problem is working with the blanket (or vermiculite, brick dust, etc).

Always wear a respirator when working with this stuff (even one of those cheap allergy masks is better than nothing).

You only get one set of lungs. Take care of them.

REE REE B 08-29-2012 04:03 PM

Re: Ceramic Blanket
Ceramic Insulation
Alumina-Silica insulating boards and blankets are the most efficient material available for pizza oven insulation. Heat resistant to over 2,300F, ceramic fiber boards and blankets offer extremely low thermal conductivity and are twice as efficient as Insulating Concrete based on either vermiculite or Perlite. Oven insulated with 100% ceramic insulation provide faster oven heat up and better heat retention, and use less space. Usually it is a 3 1inch blankets of insulation

Spinal 08-29-2012 10:33 PM

Re: Ceramic Blanket
Agreed that the blankets are better than vermiculite from an efficiency perspective - but what about the health aspects?

In Europe, the use of CF is highly frowned upon - there is quite stringent legislation to ensure that they are sold as "death traps" pretty much. A stuff called (here at least) "body soluble" blankets is offered as a substitute - any idea how efficient that is?

Johnny the oven man 08-30-2012 06:30 PM

Re: Ceramic Blanket
Whilst Ceramic fibre is a possible carcinagenic product, testing on laboratory rats has shown that the rats have to be just about made to eat the CFB to have any problems. Yes, just wear a mask and cover any naked skin, as it itches like crazy. I have been in the refractory game for 30 years, and still yet to know of any person, even blokes who have been in the trade longer than me, to have any issues caused by CFB.
Bio-soluble fibre is fine, its lower temperature rated to 1000c, but that wont cause any dramas in a WFO. Only thing to be wary of, it doesnt like moisture.

Les 08-30-2012 06:37 PM

Re: Ceramic Blanket

Originally Posted by Spinal (Post 137529)
Agreed that the blankets are better than vermiculite from an efficiency perspective - but what about the health aspects?

I'm pretty sure it won't kill you for at least 4 years (and counting) ;)

hungng 09-05-2012 10:05 PM

Re: Ceramic Blanket
I've located a supplier of a product called 'Rockwool'. Much cheaper than anything else I've found. Does anyone know this product and is it suitable?

brickie in oz 09-06-2012 02:01 AM

Re: Ceramic Blanket

Originally Posted by hungng (Post 137861)
I've located a supplier of a product called 'Rockwool'.

Rockwool is not ceramic blanket and will not have the insulating properties of ceramic blanket, Rockwool is only good in your ceiling to keep the heat in/out.

All times are GMT -7. The time now is 08:44 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
2006/10 Forno Bravo, LLC