My Cast Refractory Oven Build Other Oven Types Discuss My Cast Refractory Oven Build in the Pizza Oven Design and Installation forums; Originally Posted by david s I would be making sure that the dome sat on top of the floor rather ...

[JoeyVelderrain]

Originally Posted by david s

I would be making sure that the dome sat on top of the floor rather than the floor inside the dome, otherwise your ratio will be out further. Some mortar between the dome and the floor will also help to get closer to the ideal ratio.

but my door opening will also change...

[DrakeRemoray]

I think a door that is too low/short is better than too high...
Drake

[JoeyVelderrain]

Originally Posted by DrakeRemoray

I think a door that is too low/short is better than too high...
Drake

but being an inch too low, will it prohibit good air exchange?

[david s]

Joey,
To further explain what I meant, take these three situations (let's say your floor is 3")

1. Dome on top of floor
9.75 div 17.25 = 56.5%

2. Floor inside dome
6.75 div 14.75 = 45.8%

3. Dome on top of floor with 1" mortar between them
10.75 div 18.25 = 58.9 %

[kombiman]

Originally Posted by david s

Joey,
To further explain what I meant, take these three situations (let's say your floor is 3")

1. Dome on top of floor
9.75 div 17.25 = 56.5%

2. Floor inside dome
6.75 div 14.75 = 45.8%

3. Dome on top of floor with 1" mortar between them
10.75 div 18.25 = 58.9 %

What %age is 'optimal'?

[david s]

My belief is that it is the golden ratio ie. 1:1.618
which is 61.8%, but history says the ancients used 63% which is practically the same.

[JoeyVelderrain]

Originally Posted by david s

Joey,
To further explain what I meant, take these three situations (let's say your floor is 3")

1. Dome on top of floor
9.75 div 17.25 = 56.5%

2. Floor inside dome
6.75 div 14.75 = 45.8%

3. Dome on top of floor with 1" mortar between them
10.75 div 18.25 = 58.9 %

cool, so just raising the entire thing 1" above the floor will get me alot closer. that is an easy fix!
thanks.

[JoeyVelderrain]

now, if i raise it 2" above the floor...
11.75 div by 19.25 = 61.08% which is almost perfect!

[david s]

You could assemble your mould again and cast a 2" high piece.

[JoeyVelderrain]

Molds were a one time use. How wide are fire bricks?