What Concrete for a cast flue?

[fxpose]

Re: What Concrete for a cast flue?

Use fire brick to make my transition then do the exterior decorative chimney, then use a sonotube liner or some kind of interior form and fill the void with the pearlite concrete mix

Instead of using a sonotube how about using a single-walled stove pipe as interior form? I did that. I formed perlcrete around single-walled stove pipes from the vent up.

[david s]

Re: What Concrete for a cast flue?

George, that would be the simplest solution, but I think Eric wants a variation in diameter and has some bends to cope with.

[EricU]

Re: What Concrete for a cast flue?

Instead of using a sonotube how about using a single-walled stove pipe as interior form?...

I was wondering if it would be OK to do that. Just pour around it and leave it in.

Can I use the cheap snap together stove pipe stuff - 6" diameter?

Any suggestions on where to get it?

Eric.