My UK build is out of the ground!

[brickie in oz]

Re: My UK build is out of the ground!

I think heat transfer would act very similar to water.
If there is continuous contact or it can flow unimpeded without a barrier then it will.

[vincentvega_uk]

Re: My UK build is out of the ground!

Yeah, I agree Al.
I am thinking of putting a split course of those insulated firebrick in to form the thermal break, then continue the herringbone to the front arch.

Will those insulated firebrick do the job?

Cheers

Allan

[vincentvega_uk]

Re: My UK build is out of the ground!

Ok, got my inner arch done.
Couldn't work out the transition cuts on the back of the arch perfectly, (maybe I struggled to grasp it as im using forms rather than a IT), my cuts on the arch seem steeper than some I have seen. But as far as I can see its working out well, im cutting the arch and cutting the dome in also, and I am getting a fairly tidy transition.
I have only got 2 more chains then im over the arch now.
I pulled the dome forms out as I couldn't get the brick that would sit directly on the form in the correct position. The form was preventing the brick from following the true curve of the dome, so the brick would lip quite a bit over the course below. They were a good template for my first few chains, but as the radius tightens I think it would have only got worse if they stayed in!

Any feedback always welcome.

Cheers

Allan

[brickie in oz]

Re: My UK build is out of the ground!

Yeah, I agree Al.
I am thinking of putting a split course of those insulated firebrick in to form the thermal break, then continue the herringbone to the front arch.

Will those insulated firebrick do the job?

Cheers

Allan

I used insulating fire bricks for my heat breaks and they work really gooder.

[Bookemdanno]

Re: My UK build is out of the ground!

You'll still get a fair amount of heat into the outer arch and area through the hot gasses flowing up the chimney and heating all the surrounding brickwork. Don't expect this area to be cool, or anything. You should however notice that when the fire dies, the chimney and arch should cool far quicker than the oven bricks.
Vermiculite bricks, like what are used in woodburners could do, but as with most insulating materials they are usually fragile. Another way is to stuff a gap with stove rope and use a heat proof mastic to seal.

[stonecutter]

Re: My UK build is out of the ground!

Not trying to be a pain, but your oven opening appears to be too high and wide. If you please, what are the dimensions?

[kbartman]

Re: My UK build is out of the ground!

If I would like to install a fire break in the firebrick floor at the entry to the inner arch, what would I use to make the firebreak itself?

Cheers

Allan

I also wanted to do something for a thermal break. Of course I am not sure if this has any effect at all, but here is what I did. I did basically the same thing between the inner arch and the entry. Just a few cuts with the saw to lessen the surface area of contact. I'm sure it will fill with ashes, but still should help.

Allen,
Your building is coming along nicely, beautiful arch

Below is a link to my thread about my heat break. Now that I fired the oven and taken so data to measure the performance. I think it is performing nicely my oven was still 120F after seven days with only a piece of cement covering the opening. There is definitely a big temperature change across the break. I'm glad I took the time to incorporate the heat break. Do yourself a favor and put one in.

Good luck with your build keep up the good work. I'm also seeing what stonecutter is, your arch does look a little high. Did you follow the golden rule max 63% of dome height?

My floor heat break is blend of the those whom trodden before. I'm not sure how well it will perform, but it's better then nothing. I should had used a wider piece of stainless. it would have allowed a thicker section of insulating brick beneath. I ended up with only a one inch sliver of insulating brick. I thought about beveling the two types of brick but didn't thing I would gain much. Most of all the angle cuts would have been a nightmare of difficulty. So it is what it is. I can always put a wider insulating and stainless barrier later if I don't like how it performs.

I incorporated a ceramic fiber band like Gulf did, this should slow some of the heat transfer to the stainless and beyond. We will see......... I allowed the stainless tubing to be slightly higher than the surrounding bricks. This should keep the edges of the bricks from chipping. The square tubing has a nicely rounded corners the and any tool or pans etc... should glide over it easily I hope.

[kbartman]

Re: My UK build is out of the ground!

PS,
A floor break would do little good without a arch heat break also.

[stonecutter]

Re: My UK build is out of the ground!

Allen,

Good luck with your build keep up the good work. I'm also seeing what stonecutter is, your arch does look a little high. Did you follow the golden rule max 63% of dome height?

As a point of reference, ideal range is 60%-64%

[kbartman]

Re: My UK build is out of the ground!

As a point of reference, ideal range is 60%-64%

Thanks for the clarification cause mine ended up slightly more then the 63% that make me feel better.

[Bookemdanno]

Re: My UK build is out of the ground!

either way...it'll still work.

[vincentvega_uk]

Re: My UK build is out of the ground!

The door is 63% of the overall height, but I know where the problem/issue is, and now hoping the oven will still be fine.
The issue is that I have begun my dome shape of the first ring of vertical half bricks, not the oven floor. So in essence my dome is half a brick taller then it is wide.

Dimensions are, 40" width, 24" high.
Opening is 14 3/4 high, 22" wide.
All measurements taken of firebrick floor.

I do realise now that that seems quite large compared to most on here, but it is still 63%, its that my dome is raised on the first course I guess.

Any thoughts?

Cheers

Allan

[vincentvega_uk]

Re: My UK build is out of the ground!

Thanks for the advice guys, always welcome!!

Allan

[vincentvega_uk]

Re: My UK build is out of the ground!

Todays efforts, closing of the dome.

Cheers

Allan

[mirassou]

Re: My UK build is out of the ground!

Beautiful!! Love the arch!