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  #181  
Old 05-06-2013, 06:12 AM
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Default Re: K79 Oven Build

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Yes, many kilns are built with no mortar, but I think you should mortar the entry bricks well.
What do you mean by mortar them "well". 1/4" joints?
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  #182  
Old 05-06-2013, 07:51 AM
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Default Re: K79 Oven Build

No gaps on the hot side if possible. But some mortar to reduce the chance of. future dislodging by an oven tool.is what I think was being referenced here.

Chip
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  #183  
Old 05-06-2013, 09:14 AM
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Default Re: K79 Oven Build

Ok so I went home on my lunch break and cut 2 bricks which made 4. I just placed them, I'll square them off when I mortar them, but how do they look. There are going to be some mortar joints here and there on the inside of my dome. Is 1/8" to wide?

There's no issue with placing the cut face of the brick on the inside of my dome is there?

Also these are just off to the right of my entry (it's where I placed the first bricks I cut months ago so you won't see them... my cuts weren't so good back then... not that they're great now )


Last edited by K79; 05-06-2013 at 09:43 AM.
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  #184  
Old 05-06-2013, 10:24 AM
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Default Re: K79 Oven Build

I don't think 1/8 is too large of a gap. The thinking is (was) that it would accelerate spalling. I haven't seen any evidence of that in my oven but I don't use it 24/7 either. If you are not going to mortar every brick make sure that they are tapered so they don't "drift" out. The cut face is fine if it is on the inside, just about every on of mine are that way because it was a cleaner look.
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  #185  
Old 05-06-2013, 10:30 AM
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Default Re: K79 Oven Build

All the bricks fit pretty tight. Should I coat the entire outside of my dome with a little mortar when I'm done? Maybe mix in some vermiculite while I'm at it. I really can only add about a 1/2" to my dome when complete so my framing fits. Basically the issue would be me hitting the brick with a pizza peel or roasting pan right?
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  #186  
Old 05-06-2013, 11:38 AM
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Default Re: K79 Oven Build

If you hit a brick with your peel I don't think it is going anywhere because there is a lot of weight on it.

You do have plans for insulation, correct? You are going to need a lot more than 1/2 inch.
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  #187  
Old 05-06-2013, 11:40 AM
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Default Re: K79 Oven Build

3" fiber blanket and I'm going to burry it in vermiculite. I was wondering how the brick would would drift out?
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  #188  
Old 05-06-2013, 12:00 PM
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Default Re: K79 Oven Build

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I was wondering how the brick would would drift out?
Maybe I should have said drift in. These things expand and contract with the heat cycle. If you don't use mortar the only thing to keep it from moving (in) is the taper.
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  #189  
Old 05-06-2013, 12:05 PM
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Default Re: K79 Oven Build

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Maybe I should have said drift in. These things expand and contract with the heat cycle. If you don't use mortar the only thing to keep it from moving (in) is the taper.
Ok got ya. All of my bricks are tapered so I guess I can omit the 1/2" of mortar around the outside of the dome.

Thanks
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  #190  
Old 05-06-2013, 01:12 PM
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Default Re: K79 Oven Build

Are these dimensions ok for my keystone for my inner arch? Kind of small I think...

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