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-   -   48" brick oven from Melbourne (http://www.fornobravo.com/forum/f21/48-brick-oven-melbourne-20573.html)

Dario 04-14-2014 05:45 PM

48" brick oven from Melbourne
 
G'day everyone,
I finally decide to build WFO from scratch. Never done one before and i don't know which way will go, but i hope with your critics, help and advice i may manage to finish the project that i have started.
The Dome internal size i was planing to make is W1200mmxH600mm.
This is what i have manage to come up to, then i start reading about insulating floor and i don't know if my floor it's good enough. After reading 40"build from Tasman Peninsula.


[IMG]http://i1203.photobucket.com/albums/...0/P1030458.jpg[/IMG]
[IMG]http://i1203.photobucket.com/albums/...0/P1030467.jpg[/IMG]
[IMG]http://i1203.photobucket.com/albums/...0/P1030473.jpg[/IMG]
[IMG]http://i1203.photobucket.com/albums/...0/IMG_1858.jpg[/IMG]

The Refractory Tile 300x300x50mm are laid on 1" compacted sand, this is where i got worried before i proceed to brick first row of dome?
Is this enough insulation under tile or should i make ticker to about 2"?

Thank you !

Blunt Tool 04-15-2014 10:06 PM

Re: 48" brick oven from Melbourne
 
Hi Dario,

What you've done so far looks good! I notice there is no lintel over the opening in the base - is this a deliberate thing? Is there any reinforcing rod through those bricks above the opening? There will potentially be quite a bit of weight bearing down on top of this and the inherent strength of the concrete may not be enough?

With regards to insulation, I agree it can be quite confusing and the bottom line is that it depends on what you intend to use the oven for. If it is just pizza, then maximum insulation is best and less thermal mass. If you want to cook bread and other things then (some) more thermal mass can be good. My concern with your slab is that, even if you intend to cook bread etc in large quantities, your slab is not isolated from the base stand. This has also been core filled, so represents a very large amount of thermal mass that will be draining all your heat away from the oven. The slab on my oven which you refer to (on the Tasman Peninsula) is at least a "floating" slab, separated from the mass of the base stand, and also has a thick layer of insulation underneath it.

My suggestion would be to add significantly more insulation under your hearth bricks. How to do this I can't say as I didn't go that way myself, but I'm sure others can help here too.

Hope that helps.

Andrew

GianniFocaccia 04-15-2014 10:50 PM

Re: 48" brick oven from Melbourne
 
It would be wise for you to review as many builds as you can prior to proceeding with your oven, as you will save many steps and headaches by not trying to figure things out as you go along. Read through the builds by local mates Colin

(http://www.fornobravo.com/forum/f51/...bee-18249.html)

and Sharkey

(http://www.fornobravo.com/forum/f21/...ace-14459.html)

With the skills you have exhibited so far, I'm sure you will end up with a nicely-performing oven.

Sand is not a viable form of insulation.:)

ATK406 04-15-2014 10:55 PM

Re: 48" brick oven from Melbourne
 
Sand is not an insulator.

Dario 04-16-2014 04:00 AM

Re: 48" brick oven from Melbourne
 
4 Attachment(s)
Thank you for the reply.
The WFO will be for pizzas mainly it will be for some slow cooking, some times bread to ...But it's all for family joy.
Today i have done some work to, i progress with build i'll post some pictures.
I'm taking family for a Easter brake and will be continuing next Tuesday once i return.
There is a lintel but from inside and it's not visible from outside.To late to change anything i've done a lot today.
May i Wish you all a Safe and Happy Easter..

Dario

oasiscdm 04-16-2014 04:20 AM

Re: 48" brick oven from Melbourne
 
Hi Dario

I know you have progressed to dome build but I would really reconsider your choice to use sand as an insulator our hearth before going any further.

I'm not sure of the threads but have read on this forum about performance of ovens that don't use good insulation [or any] of the base. these ovens just don't perform all that well. The idea is to insulate insulate insulate if you are not sure add more, the hearth and dome is meant to hold heat and the mass gets saturate it is also cheaper to run wood wise.

Personally I get around 4 days of cooking when completely fired saturated and sealed.

your decision but I would consider the comments made here and above before going further.

Better to pull something down now than to regret not doing it when it is finished especially with the amount of work involved in building it in the first place.

Greenman 04-17-2014 04:56 AM

Re: 48" brick oven from Melbourne
 
Hey Dario

I agree with Colin and believe that the best way to deal with an error is to backtrack that bit, put it right and proceed.

The alternative is to tolerate poor performance from your oven for as long as you use it.

You have a good start and some back tracking would not cost you as many blisters as you will get from the extra work on the axe splitting wood into the future.

Just my 2 bobs worth. Good luck with your build.

Acrigg 04-19-2014 04:24 PM

Re: 48" brick oven from Melbourne
 
Hey Dario,

How are you going, I'm doing a similar build to you. My cooking area is 1m in diameter.

I started a few weeks/weekends ago and today I'm going to insulate my dome.

How do you plan on building the dome? Are you using sand or are you building a frame to follow?

Ive looked and many forums and have come to the conclusion there must be 100 ways to build a WFO. Sounds like your use will be similar to me, occasional, and not to concerned about having a maximum cooking time.


In saying that I did insulate my cooking floor with perlite concrete. I wanted to to a good cooking surface as I'm using standard house bricks for the dome. ( a big no no according to most fourms) but for the amount I plan on using I don't think it'll be a problem.


I'll be interested to see your final outcome.

Dario 04-22-2014 05:12 AM

Re: 48" brick oven from Melbourne
 
Ok boys,
I've been thinking, any advice what i could use under oven floor ?
Hebel blocks from bunnings?
Thank you!

oasiscdm 04-22-2014 05:23 AM

Re: 48" brick oven from Melbourne
 
Dario

I have a Hebel hearth base and used calsil board hearth. About 300 all up. Cheaper than a concrete hearth base. It is all about insulation. And keeping the heat in.


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