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-   -   Florida Igloo (http://www.fornobravo.com/forum/f21/florida-igloo-5702.html)

leemc 12-02-2008 06:40 PM

Florida Igloo
 
3 Attachment(s)
Well after a lot of planning, hand wringing and negotiating with my wife, I have started my oven (actually back in September). I plan to do a brick clad igloo with an offset center chimney. I really like the look of the WFO Jamie Oliver uses in his new series on the Food Channel - in fact, that along with this site, is what got me interested in building my own oven. I have attached a snapshot pulled from Google Sketchup that I want it to ultimately look like along with a couple of pictures of what the site looked like before I started.

I have three elements to my oven planned that I have not seen on many others. The first is the arched hearth bottom which I am just doing for looks. Another element is the center dome chimney. Again, I just like that look better than the over the arch chimney. The last thing is that I want to double the oven as an offset smoker. I will detail how I plan to do that in subsequent posts but - I think that it isnt something that is too hard or expensive and can be easily abandoned if it doesnt work out. I would love to get some feed-back on those last two issues especially.

I have a construction background so building the structural elements are not a problem with me. I am currently at the structural hearth point and getting ready to do the hearth insulation. I will post my progress history photos with comments on each stage in posts to follow.

Thanks

Lee

leemc 12-02-2008 06:52 PM

Re: Florida Igloo
 
3 Attachment(s)
Here is my base slab prep. Dont have to worry about getting below the frost line here but I did want to get some positive slope on the slab under the wood storage. Its pretty humid and rainy here, especially in the summer, so I want any water that gets in there to find its way out.

Just used a wheelbarrow and hoe to mix - a good workout for a 46 year old guy but not to bad. Sore for a couple of three days though.

Lee

Les 12-02-2008 07:14 PM

Re: Florida Igloo
 
Lee,

Looks like you are off to a great start. I don't see any issues with the arched hearth - will look great. The chimney may be a problem unless you can seal it tight to retain the heat. This is assumed that you will want to bake in the oven as well.

Good luck on the build!

Les...

leemc 12-02-2008 07:18 PM

Re: Florida Igloo
 
3 Attachment(s)
Dry stacked the concrete block and filled every other cell with concrete. I then attached the form ledgers - consisting of a plywood rip and a 2x4 - to the inside of each block wall with Tapcons. These will provide support for the hearth form deck at the edge of the wall on each side.

At this point I had a decision to make. I thought long and hard about whether I wanted to put brick inside the wood storage area or just go cheap since want to put some doors on it to cover the opening eventually. But I decided - why go cheap at this point? I did want to lay brick as many courses high as possible because its going to be a nightmare laying it under the hearth after I pour it.

Also I want to say that I am no brick mason but I think I am picking it up. I wanted a rustic look anyway!

leemc 12-02-2008 07:23 PM

Re: Florida Igloo
 
Les

I think I am going to struggle with the chimney but I have some ideas that might make it work. I will run them up the flagpole here and get some thoughts once I get to that stage. I will have a dome to build between now and then though.

Lee

leemc 12-02-2008 07:53 PM

Re: Florida Igloo
 
4 Attachment(s)
Starting my formwork now for the hearth. The arch will be a little tricky, but I my Idea is to attach a curved ripped plywood to a 2x4 every 18, then run 1x2 strips perpendicular on the curved plywood at 6 to 8 on center. A thin 1/8 sheet of Luan plywood could be wrapped onto this arch and still support the weight of the wet concrete. It may look a little like overkill, but Ive seen the disaster of a form failure before an I didnt want to see it here.

Lee

Les 12-02-2008 07:59 PM

Re: Florida Igloo
 
Some have put in dampers - don't know how effective they were in retaining heat. The real problem (just occured to me), is when you are generating the fires of hell, the heat will be escaping. The whole point of the design is to reflect the heat back down to charge the floor. At any rate, God speed!

Les...

leemc 12-02-2008 08:29 PM

Re: Florida Igloo
 
Les

I don't plan on having a center dome exit for the flue gas, but an arch flue with an off the arch chimney. I plan on running the flue gas between the inner and outer dome, up to the center and out of the chimney. Just an idea - it looks like it works for the Jamie Oliver oven. I just got to figure out the best way to make it work

Lee

Les 12-02-2008 08:57 PM

Re: Florida Igloo
 
OK - I undrstand now (never seen the Oliver build, will google). Outside the box and VERY COOL. This envelope gets pushed with every build - love it!

Les...

RTflorida 12-02-2008 10:05 PM

Re: Florida Igloo
 
Im WFO speak - you are doing an interpretation of a squirrel tail oven (where the flue pipe wraps back over the dome and up the center or back).
I believe I have read that it is not recommended (and does not meet national fire code) to have any single bend greater than 30 degrees...maybe dmun can step in and clarify, I'm thinking I read this in one (or more) of his posts.
In any case, good luck, it will be a sweet build when you pull it off.

RT


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