1" of Thermal Mass VS. 1" of Insulation

[Frances]

Re: 1" of Thermal Mass VS. 1" of Insulation

You can still do a thin coat to seal up the oven, and give it a little structural integrity. You can just put it on with a trowel -- no heavy lifting.
James

So the cladding IS structurally necessary (or advisable)?

[james]

Re: 1" of Thermal Mass VS. 1" of Insulation

I would put adding thin coating in the advisable category. Definitely nothing thick or heavy. It does not take a lot of time, or material -- and I can't think of a negative.

You will patch up any potential cracks, or spots that might leak a little hot air or smoke.

Would our experiened builders agree with that?

James

[asudavew]

Re: 1" of Thermal Mass VS. 1" of Insulation

Hey James,

Thanks for the info.

I will probably add a bit to the outside, but do I really need the lime in the mix?

I hate that stuff.

I made one small batch without it, and it seemed to work fine.
I actually couldn't tell the difference.

[james]

Re: 1" of Thermal Mass VS. 1" of Insulation

I hope our pro masons can help out, but my understanding is that lime is for workability, not heat resistance -- which comes from the fireclay.

Is that right?
James

[CanuckJim]

Re: 1" of Thermal Mass VS. 1" of Insulation

James,

My understanding has always been that lime is used for added workability and stickiness. That's why I often use Type N with Lime (says that on the bag) when working on outdoor vertical surfaces.

Jim

[RTflorida]

Re: 1" of Thermal Mass VS. 1" of Insulation

The type N is very sticky stuff, CJ recommended it when I was doing my weather seal coat before tiling. As Jim says - it is great stuff for vertical surfaces, stays in place with no sagging.