Corner Build in South East PA

[Chris inPA]

Question in placement of the inner arch:

I believe that the outermost edge of the inner arch should touch the edge of the line which indicates the circumference. Is that correct? Or is it the innermost edge that should touch?

[Chach]

You may want to experiment with the refractory mortar before you use it on the whole oven. It is an air set but a heat cure. Ovens typically may not get hot enough for a heat cure. You should run these products by the blog before you purchase.

I agree with Russell...it gets very exciting to start and when you see a deal I understand the feeling of wanting to jump on it, but you have to make sure the product your buying is going to be right for the application it was intended for. This forum is a great resource for these types of questions don't hold back. My experience with refractory mortars is this I used heat stop 50 on my outdoor fireplace and it worked good but expensive. I used the homebrew for the actual oven and I liked that much better and was very easy to work with. I would use it again if I built another.

Ricky

[UtahBeehiver]

You may want to experiment with the refractory mortar before you use it on the whole oven. It is an air set but a heat cure. Ovens typically may not get hot enough for a heat cure. You should run these products by the blog before you purchase.

[UtahBeehiver]

You are probably talking about the length of the bricks for a tapered inner arch. Attached is a detail of how each brick is cut from a full length brick. As I mentioned the top dead center brick is the longest length brick. I suggest you do a search for tapered inner arch, JR did a good job, there was an Aussie builder recently as well but forgot name.

[Chris inPA]

What the wall looks like pointed.

[Chris inPA]

I found some refractory cement in Marketplace. I got 6 of the 1/2 gallon tubs for $20.00.

[Chris inPA]

UtahBeehiver What I meant was in the pictures of your build, there's one picture in particular that looks like a 6" brick aside of the taper cut brick aside of your template. It's definitely not a 1/2 brick, but it doesn't look like a full 9" either.

[UtahBeehiver]

With a tapered inner arch you need to start with a full length brick (9") not 1/2 bricks as a basis. However, they are cut based on the IT for the inside and outside of the dome. The longest brick is the top dead center of the arch since the dome moves away the farthest from the inner arch. On tapered inner arches each brick is slightly different so you cannot cut them all the same. This is one of the most difficult concept for builders to mentally visualize but you get a "ah hah" moment as the arch takes shape. It is best to pre-lay the full arch out rather than cut as you go.

[Chris inPA]

UtahBeehiver , looking at the pictures of your build, it looks like the bricks comprising your inner arch aren't the full 9" in depth. They look to be 6" in length. Am I correct in that assumption?

Chach My original build thread.

[Chris inPA]

Waiting for my perlite to arrive. So, I started covering the blocks with a stone vernier. mongota Thank you again for that idea. I'll pour columns on the ends afterwards. Perhaps I should have poured the columns 1st.

[Chris inPA]

Angle grinder, diamond blade, sweat, and words I don't say in Church.

[Chris inPA]

I stripped off the forms from the hearth today.

I made a custom Keystone for the outer arch.

[Chris inPA]

Hearth poured today.

[Chris inPA]

Outside arch is 28"
Inner arch is 24".

Both are cut a quarter inch short with the intention of shimming to the proper height.

[Chris inPA]

Again.
Let's try this picture.