Ceramic Fiber Board

[morrishuckeba]

Has anyone ever used 3"Ceramic Fiber Board for insulation under your cooking floor Instead 2” Ceramic Fiber Board?

[kebwi]

Re: Ceramic Fiber Board

I used three 1" layers of InsBlock 19. Others here have used ceramic based boards as well. 1", 2", 3", it's all the same basic idea. I believe insulation is fairly linear (2" is twice as good as 1", etc.).

[Johnny the oven man]

Re: Ceramic Fiber Board

Fibre board is a lot less dense, but far inferior in structual strength.

[PedaroniCachini]

Re: Ceramic Fiber Board

does anyone know what i can put in between my ceramic board and firebricks? can i just use a normal refractory mortar?

[kebwi]

Re: Ceramic Fiber Board

You mean the oven floor? I didn't put anything between them. The bricks went straight down on the board.

[dmun]

Re: Ceramic Fiber Board

Yes, one of the advantages of using insulating board is that it's flat. You can put your bricks right down on it, as I did. Mortaring the floor down is not considered a good idea.

[PedaroniCachini]

Re: Ceramic Fiber Board

Ok thanks! i will make sure i cut them well so it fits together tight so they dont get gaps in between them.

[Lburou]

FBX insulation board

I bought some 2" FBX Insulation Board today from a refractory company. They told me to cut it with a butcher knife

QUESTION IS: How much weight can this material support? Should I use it for the floor bricks only and NOT the first chain?

A picture would help my understand here....

I apologize if it looks like I'm hyjacking your thread morrishuckeba

[fxpose]

Re: FBX insulation board

QUESTION IS: How much weight can this material support? Should I use it for the floor bricks only and NOT the first chain?

Whether you place the first chain on the floor or surrounding the floor, the ceramic board should be underneath the entire floor/dome wall assembly, regardless. The board has tremendous compressive strength.

[Lburou]

Re: FBX insulation board

Whether you place the first chain on the floor or surrounding the floor, the ceramic board should be underneath the entire floor/dome wall assembly, regardless. The board has tremendous compressive strength.

OK fxpose (George), let me run this by you and see if I really understand, OK?
The board can take the weight of the oven floor AND the dome, yes....?
(It seems very lightweight to do that). Do you put the dome directly on the board, or do you use a layer of sand and fireclay, or perhaps, some home brew?


Thanks for clarification

[fxpose]

Re: FBX insulation board

OK fxpose (George), let me run this by you and see if I really understand, OK?
The board can take the weight of the oven floor AND the dome, yes....?
(It seems very lightweight to do that). Do you put the dome directly on the board, or do you use a layer of sand and fireclay, or perhaps, some home brew?


Thanks for clarification

Yes, everything sits on the board, as you can see from this photo.
The firebricks sit directly on the board, and nothing in between (no fillers) as long as the board surface is nice and even.

[Lburou]

Re: FBX insulation board

Yes, everything sits on the board, as you can see from this photo.
The firebricks sit directly on the board, and nothing in between (no fillers) as long as the board surface is nice and even.

Thanks!

[dmun]

Re: Ceramic Fiber Board

Usually the board is flat enough to put the brick floor directly on the insulation board without any leveling medium. If one brick is a bit low you can supplement it with a bit of brick cutting slurry or fireclay.

Whether to build the dome on top of the floor bricks, or cut the floor bricks to fit inside the dome is entirely builders choice. I built my dome on the floor to avoid a few fussy cuts, and to distribute the weight a little more widely.

And yes, the board is strong enough to support your entire assembly. In my case I have two stories of heavy flue tiles piled on top of my entry, and there's no discernible settling. Remember: insulation boards are very crush resistant. They build entire buildings on top of a type of insulation board.

[Lburou]

Re: Ceramic Fiber Board

snip....And yes, the board is strong enough to support your entire assembly. In my case I have two stories of heavy flue tiles piled on top of my entry, and there's no discernible settling. Remember: insulation boards are very crush resistant. They build entire buildings on top of a type of insulation board.

That is what I was concerned about, thank you for giving me confidence.....That board feels light and delicate. I'm still gathering materials. Delayed also by freezing temperatures.

[stonylake]

Re: Ceramic Fiber Board

good morning lburou, i set a full brick soldier course on 2" and then put another 1" inside the circle before i laid the floor. i had a couple of floor bricks that i leveled with just a little bit of loose fire clay... and i did that after i was finished with the entire build.