First WFO build

[mrchipster]

Re: First WFO build

Interesting shape, are you going to cut them in half and alternate row thicknesses?

1.5 inch row 1
1.75 row 2
1.5 row 3 etc..

[swarm1023]

Re: First WFO build

Yeah, these are very dense, heavy firebrick, not the lightweight, soft insulating bricks. Didn't think to get a close up pic of the brick this morning, but I have this. I done a quick layout when I was unloading the brick at the house just to see how they would stack up.

[mrchipster]

Re: First WFO build

Picture of your bricks would be helpful for comments.

[david s]

Re: First WFO build

You need dense firebricks with thermal mass for a WFO. Your kiln bricks may be insulating fire bricks and therefore not suitable. Although insulating bricks are an excellent underfloor insulation as an alternative to fibre board.
Hydrated Lime is highly suitable as a binder for the temps seen in a WFO.

[swarm1023]

Re: First WFO build

Any and all suggestion/comments are appreciated, thanks

[swarm1023]

Hey guys, I've been reading on this site for quite some time and have picked up a lot of valuable info, thanks.

I work at a ceramic tile manufacturer and have been given some kiln brick from a kiln that was taken out of service and am planning to build with it. The brick are 4x9 and have a 2.5" to 1.5" taper so they actually form the arch of the dome perfectly. I wandering however if it will take me forever to get that much mass fully saturated with heat, and also questioning putting fiberboard under the floor. Several here think the same way I do and that the fiberboard isn't going to hold up well over time being outside. Just the hot and cold and humidity will eventually break it down. So I'm thinking of just bedding it on a layer of crushed tile, which I think should hold the heat fairly well and since I will be standing the brick on its side I don't think too much heat will be going down through the 4" of brick.

I was in search of some hydrated lime and went to a local brick and block supplier that has been in business for many years and the guys there told me that they have never sold hydrated lime to mix in with the mortar. He said the Portland cement, fire clay and sand has never given them any problems, any thoughts?

I've got a little work into all ready, I'm building a retaining wall out of stone that I had laying around and will backfill with gravel and probably do a 6" layer of crushed tile to bed it on.